Question # 1

The remove the term involving xy, from 7x2 -6√3xy+ 13y2 -16 =0 the angel of rotation is

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θ = 30°

θ = 45°

θ = 60°

θ = 75°

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w¹⁵= ______

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0

1

w

w²

By expressing sin 125° in terms of trigonometrical ratios, answer will be

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sin 65° = 0.9128

sin 55° = 0.8192

sin 70° = 0.5384

sin 72° = 0.1982

The value of x, and y, when (x + iy)²= 5 + 4i

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X = 2, y = -1

X = -2, y=1

X = 2, y = -1

X = 2, y = 2

Choose an answer

The obtuse angle between lines = -2 and y = x +2 is

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120°

135°

150°

140°

w²⁸+ w³⁸= ______

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0

1

w

-1

If b₁, b₂, b₃, ... are in G.P. with first term unity and common ratio r, then the minimum value of b₁- b₃+ b₅is equal to

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3/4

1/4

1

None of these

Choose an answer

none of these

For which of the following ordered pairs (s, t) is s + t > 2 and s - t < -3?

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(3, 2)

(2, 3)

(1, 8)

(0, 3)

If 3x⁴+ 4x³+ x - 5 is divided by x + 1, then the reminder is

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0

7

-7

5

The solution set of the inequality ax + by < c is

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straight line

half plane

parabola

none of these

The set (Z, +) forms a group

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Forms a group w.r.t addition

Forms a group w.r.t multiplication

Non commutative group w.r.t multiplication

Doesn't form a group

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The sum of first twenty odd integers in A.P is

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400

397

404

408

If we have a statement "if p then q" then q is called

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Conclusion

Implication

Unknown

Hypothesis

Multiplicative inverse of 0 is

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0

1

±1

Does not exist

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If b²- 4ac is positive then the roots of the equation are

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Real

Imaginary

Positive

Negative

1,1/3,1/5,1/7,1/9..... is a

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geometric sequence

finite sequence

infinite sequence

arithmetic series

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1

0

-2

3

Choose an answer

2x + 2y

4 - x²

-x/y

x/y

Choose an answer

The fifth term of the sequence a_n= 2n + 3 is ______

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13

-13

8

3

120° degrees are equal to how many radians?

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-8

8

8i

32

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-cosec²x

-sec²x

- cosec x cot x

cosec x

A die is thrown, the probability that the dots on the top are prime numbers or odd numbers is

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1/2

2/3

1/3

2/5

Choose an answer

405 / 256

504 / 259

450 / 263

None

If A and B are two sets then any subset R of B x A is called

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relation on A

relation on B

relation from A to B

relation from B to A

If |a x b|2 + (a,b)2 = _____

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|a|2 + |b|2

|a|2- |b|2

|a|2|b|2

None

f(x) = sin x + cos²x is

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trigonometric function

algebraic function

exponential function

logarithmic function

The function discontinuous at x = 0 is (1) tan x (II) cot x (III) sec x (iv)cosec x)

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I & III

I & IV

II & IV

II & III

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Zero matrix

Diagonal matrix

Column matrix

Scalar matrix

A non-terminating, non-recurring decimal represent

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A natural number

A rational number

An irrational number

A prime number

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π/ 2

π/ 3

π/ 4

π

Choose an answer

Additive property in R

Multiplication property in R

Cancellation property in R

Distribution property in R

To each element of a group there corresponds ______ inverse element

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Two

One

No

Three

(x + 3) (x + 4) = x²+ 7x + 12 is ______

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Quadratic equation

Linear equation

Cubic equation

Identity

sin(π/2+θ) = _______;

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sinθ

cosθ

-sinθ

-cosθ

The line through the focus and perpendicular to the directrix is called ______ of the parabola

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axis

focal chord

tangent

latus rectum

(x3-1/x)12

Choose an answer

295

495

395

722

Geometrically, the modulus of a complex number represents its distance from the

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Point (1, 0)

Point (0, 1)

Point (1, 1)

Point (0, 0)

Which of the following statement is true?

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A set is a collection of non-empty object

A set is a collection of only numbers

a set is any collection of things

a set is well-defined collection of objects

Which of the following is a scalar

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weight

force

speed

momentum

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A circle which touches one side of a triangle externally and the other two sides produced is called ______

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In-circle

Circum cirle

Escribed circle

None of these

If Sin A = sin B, cos A = cos B, then the value of A in terms of B is

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The nth term of an A.P is (3n+5) Its 75th term is

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26

7

21

Cannot be determined

I is not

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Real number

Natural number

Prime Number

Whole Number

The equation of the normal to the circle x²+ y²= 25 at (4, 3) is

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3x - 4y =0

3x - 4y =5

4x + 3y = 5

4x + 3y = 25

If G is the centroid of the triangle, then GA +GB+GC=

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0

1

-1

3

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(x, y)

(kx, y)

(x, ky)

(kx, ky)

Choose an answer

are real no

both are not real

are imaginary no

both are imaginary

If f(x)= x³ then f(-2) is

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-2

-4

-8

8

Equation of parabola with focus F(-3,1) directrix x=3 is

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(y -1)2 =-12x

(y-1)2 =4x

(x+3)2 =4a(y-1)

y2 =-12(x-1)

Choose an answer

Imaginary

Rational

Irrational

Real numbers

Arithmetic mean between a and b is

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The number of permutations of n objects of which there are n₁like of one kind, n₂like of the second kind and n₃like objects of third kind are

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Which of the following is factor of x11+a11, where n is an odd integer

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x-a

x+a

2x-a

2x+a

The coordinates of the point that divides the join of A(-6,3) and B(5, -2) in the ratio 2:3 internally

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The 26th term of the A.P -2,-4,10,.............is

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136

-136

148

-148

Choose an answer

15/23

7/15

7/8

15/7

The point of concurrency of the medians of the ΔABC is called its

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Orthocenter

Centriod

Circumcentre

Incentre

Choose an answer

A rational number

A natural number

An irrational number

An integer

The mid point of the line segment joining the points (a,b) and (b,a) is

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When we expand (a + 2b)⁵then

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a⁵+ 10a⁴b + 40a³b²+ 80a²b³+ 80ab⁴+ 32b⁵

a⁵+ a⁴b + a³b²+ a²b³+ ab⁴+ b⁵

5a⁵+ 4a⁴b + 3a³b²+ 2a²b³+ 1 ab⁴+ b⁵

None

Three dice are thrown together. The probability of getting a total of at least 6 is

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103 / 108

10 / 216

93 / 108

None of these

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2 b

2 a

2 ab

a + b

The value of sin [ arc cos (-1/2)] is

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In (x +iy) y is called as

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Imaginary part

Complex number

Real part

None of above

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π/ 4

π/ 6

π/ 3

2π/ 3

The smallest positive root of the equation tan x - x = 0 lies on

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How many terms of the A.P 3,6,9,12,15...........must be taken to make the sum 108

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8

6

7

36

Choose an answer

5

25

3

Choose an answer

The seventh term of an A.P whose first term is P and common difference is q. is

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P-6q

P+6q

P-4q

P-nq

The sides of a right angled triangle are in A.P The ratio of sides is

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1:2:3

3:4:5

2:3:4

5:8:3

The number of non zero rows in echelon form of a matrix is called

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Order of matrix

Rank of matrix

Row operation

None of these

1st four terms of the expansion (1-x)^-2are

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1 + 2x + 3x²+ 4x³

3x²+ 2x + 1

1 + 3x + 4x²+ 5x³

None of these

The domain of the principle cos function is

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The key for opening a door is in a bunch of 10 keys. A man attempts to open the door by trying the keys at random discarding the wrong key. The probability that the door is opened in the 5th trial is

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1 / 10

2 / 10

3 / 10

4 / 10

The constant distance of all points of the circle from its centre is called the

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Radius of the circle

Secant of the circle

Chord of the circle

Diameter of the circle

Which is an explicit function

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y = x²+ 2x - 1

x²+ xy + y²= 2

x²+ y²= xy + 2

All are

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Every recurring decimal represents

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A natural number

A rational number

An irrational number

A whole number

Choose an answer

I quadrant

II quadrant

III quadrant

IV quadrant

Choose an answer

An empty set

Universal set

A singleton set

None of these

The ellipse and hyperbola are called

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Concentric conics

Central conics

Both a b

None

The set of points {(x,y)|y = f(x),∀x∈} is called

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Relation

Graph of f

Function

All are correct

The set {{a,b}} is

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Infinite set

Singleton set

Two points set

None

The multiplicative inverse of -1 in the set {1-,1} is

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1

-1

±1

0

Does not exist

Which of the following has unchanged valency?

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H

Na

Fe

Oxygen

Which of the following has ester linkage?

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Nylon

Bakelite

Terylene

PVC

Write the name of following compound

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5 - methyle - 2- hexene

2 - methyle hexene

4 - ethyle - 2 - methyle hexene

3 - ethyle - 3 - methyl hexene

Alkanes have functional group :

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----X

--OH

----COH

No functional group

The oxides of which of the following elements will be acidic in character

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Mg

Rb

Li

Cl

Which of the following form normal oxide

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K

Li

Na

None

Purification of an impure copper is made by electrolytic cell, in which impure copper is anode and pure copper is cathode, and the electrolyte used is

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H₂SO₄

CuSO₄

ZnSO₄

Na₂SO₄

The unit of rate of reaction is

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mole dm^-3

mole Kg^-1

moles dm^-3sec^-1

grams dm^-3

Nylon 6, 6 is prepared by the reaction of nexamethylene with

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Formic acid

Acetic acid

Adipic acid

None of these

During electrolysis, the reaction that takes place at cathode is :

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Reduction

Both (a) and (c)

Oxidation

No reaction occurs

Partial reduction of acetic acid happens with

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NH₃

LiAIH₄

P + HI

PCI₅

The energy absorbed when an electron is added to a gaseous atom to form a gaseous ion is called

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Electron affinity

Ionization energy

Both of these

None of these

Ethylene can be prepared in the laboratory by heating together ethyl alcohol and

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HCI

Phenol

HF

H₂SO₄

Product of concentration of ions raised to the power equal to the co-efficient of ions in balanced equation for saturated solution of a salt is called

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Ionic product

Equilibrium constant K_c

K_w

Solubility product (K_sp)

The trade name of polytetrafluoroethylene (PTFE) is

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Teflon

PVC

Terelene

Polyester

Nitrogen in NH₃is sp³hybridized but the bond angle in NH₃is 107° and not 109.5° due to

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sp³orbital planar

sp³orbital trigonal

Repulsion between lone pair and bonded pairs

None of them

Maximum hydrogen bonds in water are

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4

3

2

8

The hydrocarbons having double bonds normally end with suffix

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Ane

Ene

Yne

Oic

Which behaves as insulator for animals body?

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Carbohydrates

Proteins

Fats

Skin

Carbolic acid is the other name for

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Methanol

Ethanol

Propanol

Phenol

Vegetables oil are:

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Unsaturated fatty acids

Glycerides of saturated fatty acids

Essential oils obtained from plants

None of these

Zn + HCI are used in

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Clemenson reduction

Wof kishner reduction

Kolb's electrolysis

Wutruz reaction

Aldehydes and ketones are carbonyl compounds. Which of them react both with NaBH₄and with Tollen's reagent

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Both aldehydes and ketones

Aldehydes only

Ketones only

Neither aldehydes nor ketones

Ca, Mg, Be, Ba, belong to the same group, the order of their ionization energy values is

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Be > Mg> Ca > Ba

Ba > Ca > Mg > Be

Ca > Mg > Be > Ba

Ba > Mg > Ca > Be

Of the given alkali metals, the one with smallest size is

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Rb

Cs

K

Na

"Each different compound should have a different name" was published by IUPAC system of nomenclature in

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1892

1830

1947

1979

Which of the following compound is known as oil of winter green?

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Phenyl benzoate

Phenyl salicylate

Phenyl acetate

Methyl salicylate

The bibre which is composed of at least 85% by weight of acrylonitrile is known as

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Royan fibre

Azlon fibre

Saran binre

Acrylic fibre

Alkyle magnesium halides are known as

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Simon-smith reagent

Tollen's reagent

Grignard's reagent

Barford's reagent

A cell in which spontaneous redox reaction generates an electric current is called

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Electrolytic cell

Electrochemical cell

Voltaic or Galvanic cell

Biological cell

Phosphorus pentoxide finds use as

Choose an answer

An oxidizing agent

A reducing agent

A bleaching agent

A dehydrating agent

Ozone is not

Choose an answer

An allotrope

A powerful oxidizing agent

Paramagnetic

A bent molecule

Compounds X, Y and Z, all react with PCI₅to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z

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The shape of methanol, ammonia and water molecule can be explained by assuming

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Sp³hybridization

Sp²hybridization

Sp hybridization

All of these

In which of the following theories the hybridizationis considered

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Vsepr

Lewis

Molecule orbital

Valence bond

Which of the following has magnesium?

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Carbonic anhydrase

Haemocyanin

chlorophyll

Vitamin B₁₂

Propyne on hydrolysis in presence of H₂SO₄and HgSO₄gives

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Acetaldehyde

Acetone

Formaldehyde

None

Choose an answer

0.60

1.67

0.66

2.6

Dehydration of allcohol gives:

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Alkane

Alkene

Aldehyde

ketone

Which is not a bidentate ligand

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The substances which soften the polymer are called

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Stabilizers

Plasticizers

Retarders

Pigments

Choose an answer

High temperature and low pressure

Low temperature and high pressure

Low temperature and low pressure

High temperature and high pressure

Solution which distill without change in composition or temperature are called

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Amorphous

Azeotropic mixture

Ideal

Super saturated

Cu²⁺with d⁹electronic configuration appears

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Yellow

Pink

Blue

Green

Ketones are prepared by the oxidation of:

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Primary alcohol

Secondary alcohol

Tertiary alcohol

None of these

The nitrogen present in some fertilizers helps plants to:

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Fight against diseases

Produce fat

Undergo photosynthesis

Produce protein

A substance which increases the rate of a reaction without being consumed during the reaction is called

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An autocatalyst

A catalyst

A negative catalyst

All of these

Choose an answer

Cellulose does:

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Satisfy human appetite

Stimulates intestinal peristalsis

Gives fibre and bulk to the food

All of these

Which of the following has highest dipole moment?

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NH₃

PH₃

AsH₃

SbH₃

Which of the following compound is no formed according to octet rule:

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KrF₂

XeF₂

XeO₃

SF₆

Which of the following is a thermosetting plastic

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PVC

Polyethylene

Polystyrene

Melamines

B.O.D is connected with

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Organic matter

Microbes

Mircrobes and organic matter

None of the above

If carbon dioxide is bubbled through solution of Grignard's reagent in ether and the resultant product is reacted with hydrochloric acid, it gives

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An alkane

Al alcohol

A carboxylic acid

An aldehyde

Which of the following is a not typical transition element

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Cr

Mn

Zn

Fe

The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits

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Metamerism

Tautomerism

Enatiomerism

Geometrical isomerism

1.1 mol of A is mixed with 2.2 mol of B and the mixture is kept in on litre flask till the equilibrium is reached. At equilibrium, 0.2 mol of C is formed. If the equilibrium reaction is A+2B 2C+D, the value of equilibrium constant is

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0.002

0.004

0.001

0.003

The liquid obtained after passing the mixture through filter paper is termed as:

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Extract

Residue

Filtrate

Sample

The entropy of the universe

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Constant

Is equal to zero

Decreasing

Increasing

Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre

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Ch₃CHO

CH₃CH₂COCH₂CH₃

CH₃CO₂CH₃

HCHO

I a chemical reaction equilibrium is said to have been established when :

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Rate of opposing reactions are equal.

Rate constants of opposing reactions are equal.

Opposing reactions stop.

Concentration of reactants and products are equal

What is not a common use of methane

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As a fuel

For the preparation of haloaklanes

For the preparation of methyl alcohol

For the preparation of sulphuric acid

The human body can synthesize ______ amino acids

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1

10

20

19

The rate of reaction :

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Decreases as the reaction proceeds

Increases as the reaction proceeds

May decrease or increase reaction proceeds

Remains same as the reaction proceeds

Which one of the following properties is not correct for ozone?

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It oxidizes lead sulphides

It oxidizes potassium iodide

It oxidizes mercury

It cannot act as a bleaching agent

The isomers due to the unequal distribution of carbon atoms on either side of the functional group belonging to the same homologous series are called

Choose an answer

Functional isomers

Position isomers

Chain isomers

Metamers

Choose an answer

2-chlorobutanal

alfa-chlorobutanal

2-chlorobutyraldehyde

alfa- chlorobutyraldehyde

A transition metal complex can be recognized by various terms. Which is not the proper term

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Central metal ion

Coordination number

Ligand

Geometry of complex

Which of the following statement is correct for a chemical reaction to occur molecules of substances must

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Collide with each other

Collide with energy more than activation energy

Collide with energy less than activation energy

Collide with high frequency

The amino acids which human body can synthesize are called ______ amino acid

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Essential

Non essential

Acidic

Basic

H₂+ L₂----2Hl

In the above equilibrium system, if the concentration of reactants at 25°C is increased, the value K_C will :

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Remains Constant

Increases

Cecreases

Depends upon nature of reactans

Which formula represents the organic compound formed by the reaction of propanoic acid with methanol in the presence of concentrated sulphuric acid as a catalyst

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CH₃CH₂COCH₃

CH₃CH₂CO₂CH₃

CH₃CO₂CH₂CH₃

CH₃CH₂CH₂CO₂CH₃

The correct order of 2nd l.P. of C,N,O and F is

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O > F > N > C

O > N > F > C

C > N > O > F

F > O > N > C

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

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Aldol condensation

Reimer Tiemann reaction

Cannizaaor's reaction

Wolf-kishner reduction

The unit of the rate constant is the same as that of rate of reaction in :

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Third order reaction

Second order reaction

First order reaction

Zero order reaction

In the electronic configuration of Cr one electron from 4s sub-shell is transfered to 3d sub-shell because

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The 3rd orbital is of lower energy than 4s

The 4s orbital is of equal energy to 3d orbital

The half filled d-subshell is more stable than incomplete d-sub shell

6 unpaired electrons make Cr more paramagnetic

Easter are pleasant smelling compounds. Which ester posseses odour like pineapple

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Amylacetate

Amylbutyrate

Ethylbutyrate

Benzylacetate

The solubility of KCIO₃salt in water is decreased by adding

Choose an answer

NaCIO₃

NaCI

KCIO₄

KCI

Alpha rays consist of:

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Neutrons.

Helium nucleus.

Protons.

Hydrogen nucleus.

The solid remained on filter paper during the filtration is called the :

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Substance.

Residue.

Undue.

Filtrate.

The only alcohol that can be prepared by the indirect hydration of alkene is

Choose an answer

ethyl alcohol

propyl alcohol

isobutyl alcohol

methyl alcohol

Atoms and molecules can either gain or lose electrons, forming charge particles called:

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Positrons

Photons

Ions

Electrons

The number of electrons in the M shell of the element with atomic number 24 is

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24

12

13

8

CL₂, N₂ and O_{2 are:}

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Diatomic molecules

Hetero atomic molecules

Poly-atomic molecules

Mono-atomic molecules

The concentration of reactants is increased by x, then equilibrium constant K becomes

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ln K/x

K/x

K + x

K

Carboxylic acids on complete reduction in the presence of Hi and red phosphorus gives:

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Esters

Alcohols

Alkanes

Aldehydes

Choose an answer

8

4

9

3

Choose an answer

2, 3-dimethylbutane

2, 3-methylbutane

2-dimethylbutane

Dimethylbutane

If 18 g glucose (C₆H₁₂C₆) is present in 1000 g of an aqueous of glucose it is said to be

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1 molal

1.1 molal

0.5 molal

0.1 molal

Which three elements are needed for the healthy growth of plants

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N, S, P

N, Ca, P

N, P, K

N, K, C

When methane reacts with Cl₂in the presence of diffused light the products obtained are

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Chloroform only

Carbon tetrachloride only

Chloromethane and dichloromethane

Mixture of a, b, c

Although hydrogen resemble with the elements of group lA, IVA and Vll but it is usually placed in

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Group IA

Group IV A

Group VII

Group VIII

Solvent extraction is an equilibrium process and it is controlled by :

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law of mass action.

the amount of solvent used.

distribution law.

the amount of solute.

Phosphorus helps the growth of :

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Root

Leave

Stem

Seed

A special application of the Hess's law to binary ionic compounds of M⁺X^-type in calculation of their lattice energies is

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Enthalpy of reaction

Born-haber cycle

First law of thermodynamics

Enthalpy of combustion

When n-hexane is heated in the presence of Pt at 500°C, it cyclists to give

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Benzene

Cyclohexene

Benzene

Toluene

The chemical formula of Epson salt is

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MgSO₄

MgCl₂

MgSO₄. 7H₂O

MgCl₂. 7H₂O

Two vitamins absorbed from intestine along with fats are

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A, D

A, B

A, C

D, B

Angle 120° is observed in molecules :

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CH₄

CH_3-CH₃

CH -CH

CH_{2 =}CH₂

Carboxyl compounds have functional group:

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R-C-X

R-CH=O

RCOR

All

All covalent bonds formed between the two atoms are non-polar when

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Covalent bond between two non-metal atoms

Covalent bond between metal and non-metal

Covalent bond between two atoms of same element

Covalent bond between metal atoms

Distance covered by a freely falling body in 2 sec will be

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4.9 m

19.6 m

29.2 m

44.1 m

In a normal healthy person the value of diastolic pressure is

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75 - 80 torr

100 torr

120 torr

none of them

Physics deals with the study of

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Matter

Energy

Both of them

Human Body

The example of irreversible process is

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slowly liquification

slowly evaporation

an explosion

all of them

The acceleration of body executing SHM is directly proportional to

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Applied force

Amplitude

Displacement

Frictional force

Diameter of the nucleus s of the order of

Choose an answer

10^-10m

10^-12m

10^-15m

10^-18m

A labourer carrying a distance a load on his head moves from rest on a horizontal road to another point where he comes to rest. He has done:`

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Minimum work

Maximum work

Zero work

Negative work

On a cold morning a metal surface will fell colder to touch than a wooden surface, because

Choose an answer

Metal has high specific heat

Metal has high thermal conductivity

Metal has low specific heat

Metal has low thermal conductivity

When some compass needles are placed on a card board along a circle with the center at the wire, they will

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Point the direction of N-S

Set themselves tangential to the circle

Point in the direction of E-W

None of these

Point in direction of S-E

The critical temperature of aluminium is

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1.18 K

4.2 K

3.72 K

7.2 K

CRO deflects the beam of

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proton

a-particle

electron

neutron

The relationship between Boltzmann constant k with R and N_Ais given as:

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k = RN_A

k =R/N_A

k = NR/N_A

None of these

Triple point of water is

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273.16°F

372.16K

273.16°F

273.16

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

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+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

The first shell near the neucles is

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L-shell

X-shell

N-shell

M-shell

For the conversion of galvanometer into voltmeter, we connect a

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small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

The percentage of available heat energy converted into work by a petrol engine is roughly

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35 %

40 %

35 to 40 %

25 %

A sinusoidally alternating voltage or current can be graphically represented by a:

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Vector

Rotating vector

Clockwise vector

Anticlockwise voltage vector

None of these

Ethanol (alcohol) is a type of:

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Electric fuel

Bio fuel

Nuclear fuel

None of these

When a falling body hits ground, its KE changes to _____ energy.

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Potential

Chemical

Mechanical

sound and heat

The slopes of the tangent at any point on the curve gives the value of the

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average velocity at that point

instantaneous velocity at that point

average acceleration at that point

instantaneous acceleration at that point

Distance to nearest galaxy from earth is

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10¹⁰m

10¹⁵m

10⁴⁰m

10³⁰m

Potentiometer is more sensitive than voltmeter, because

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Voltmeter has a very high resistance

Voltmeter has a very low resistance

Potentiometer does not draw any current from a source of unknown potential difference

Potentiometer is sensitive

Three quarks make:

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An electron

A meson

A baryon

A photon

None of these

The example of reversible process is

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an explosion

changes occur suddenly

slow compression of a gas

all of them

Heat travels through vacuum by

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Conduction

Convection

Radiation

Both A and B

In a transistor, collector current is controlled by

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Collector voltage

Base current

Collector resistance

All of the above

If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be

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1/3 V

2/3 V

3/2 V

3V

Heating effect of current utilized in:

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Electric motor

Electric toaster

Electroplating

Electric kettle

Both (B) and (D)

10 c.c. each of oxygen and hydrogen are kept in separate flasks. Then which of the following relations is correct?

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Each have same number of molecules

Don't have same number of molecules

Can't be predicted

None

Tick the series which lie/s in. the infra-red region.

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Pfund series

Brackett series

Paschen series

All of these

None of these

During the steady flow, different streamlines

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cannot across each other

can across each other

either of them

neither of them

Alternating current can be transmitted:

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To long distance

At very high cost

At very low cost

Both (A) and (C)

Both (A) and (B)

Find the total displacement of a body in 8 seconds starting from rest with an acceleration of 20 cm/s²

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0.064 m

640 cm

64 cm

64 m

In the force applied is parallel to the direction of motion, then work done is:

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Maximum

Minimum

Zero

None of these

According to slok's law, drag force depends on

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Radius of the spherical body

Terminal velocity of body

Coefficient of viscosity

All of above

At high speed, fluid friction _____ and fuel consumption ___,:

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Increases, decreases

Increases, increases

Decreases, increases

None of these

If work is done at the rate of 2 k j per second, then total work done is half an hour will be:

Choose an answer

0.5 Kwn

2 Kwh

1 Kwh

None of these

A structure of polymeric solid is:

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An ordered structure

A disordered structure

Intermediate between order and disorder

Any of these

None of these

All the valence electrons present in a crystal of silicon are bound in their orbits by

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Ionic bond

covalent bond

Molecular bond

Both (A) and (B)

Both (B) and (C)

According to Rutherford atomic model, the positive charge in an atom

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is concentrated at its centre

is in the form of positive electron at same distance from its centre

is spread uniformly through its volume

none of these

The value of the input resistance of OP-AMP is of the order of

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few ohms

few hundred ohms

several kilo ohms

several maga ohms

If we draw a graph between d(along x-axis) and F (along y-axis) and get a straight line horizontal to x-axis then area under this straight line represents:

Choose an answer

Power

Work

Pressure

None of these

The current produced by moving a loop of a wire across a magnetic field is called:

Choose an answer

Direct current

Magnetic current

Alternating current

Induced current

None of these

Electromagnetic -radiation means:

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Photons

protons

Electrons

Mesons

None of these

If the absolute uncertainty of an instrument is 0.0a1 cm, then its least count will be :

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0.005 cm

0.01 cm

0.02 cm

0.001 cm

An inertial frame of reference is that frame of reference in which

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a = 0

a > 0

a < 0

all of them

The smallest three dimensional basic structure in a crystalline solid is called

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lattice point

crystal lattice

cubic crystal

unit cell

If d is the displacement of the body in time t, then its average velocity will be

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V_av= d x t

V_{av = t/d}

V_{av = d/t}

A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is

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2100 m/s²

1400 m/s²

700 m/s²

400 m/s²

Work is product of:

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Force and velocity

Heat and energy

Force and displacement

None of these

According to the Bernoulli's equation, where the speed of the fluid is high, the pressure will be

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low

zero

high

all of them

In velocity of a particle at an instant is 10 m/s and after 5s the velocity of the particle is 20 m/s. The velocity 3s before in m/s is

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8

4

6

7

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

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A - Z

A + Z

Z

A

The product of induced current and the resistance of the wire through which the current is passing is called:

Choose an answer

Electromagnetic induction

induced emf

Induced current

Self induced

None of these

The rate at which the free electrons pass through any section of a metallic wire from right to left is:

Choose an answer

Greater than the speed at which they pass from left to right

Less than the speed at which they pass from left to right

The same speed at which they pass from left to right

Any of above

None of them

Which of the following is not an example of adiabatic process

Choose an answer

the rapid escape of air from a burst type

the rapid expansion and compression of air through which a sound wave is passing

cloud formation in the atmosphere

none of them

The dot product of electric field intensity E and vector area A is called

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Electric potential

Electric flux

Electric field

Magnetic field

The product of cross-sectional area of the pipe and the fluid speed at any point along the pipe is called

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constant rate

volume rate

flow rate

steady rate

The current produced by moving a loop of wire across a magnetic field is called:

Choose an answer

Direct current

Magnetic current

Alternating current

Induced current

None of these

When a platinum wire is heated, it appears dull red at about

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500°C

900°C

1100°C

1300°C

One radian is:

Choose an answer

Greater than one degree

Less than one degree

Equal to one degree

None of them

A 10 F capacitor is charged to a potential difference of 50 V and is connected to another uncharged capacitor in parallel. Now the common potential difference becomes 20 volt.The capacitance of second capacitor is

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10μF

20μF

30μF

15μF

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

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positive temperature

negative temperature

absolute temperature

zero temperature

If force and displacement are in opposite direction, the work done is taken as

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Positive work

Negative work

Zero work

Infinite work

Which one is the least multiple

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Pico

Femto

Nano

Atto

The combined effect of resistance and reactance in a.c. circuit is called

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conductance

resistance

impedance

choke

Light waves are:

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Transverse wave

Longitudinal wave

Compressional wave

None of them

Which of the following is/are example/s if mechanical waves i.e. waves generated in _______:

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Rope

Coil of spring

Water

All of them

Magnetic lines of force:

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Cannot intersect at all

Intersect at infinity

Intersect within magnet

Intersect at Neutral Point

None of these

When the bob of simple pendulum is at extreme position, its K.E. will be

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maximum

minimum

zero

all of them

When a body is moving with uniform positive acceleration, the velocity- time graph is a straight line. Its slope is

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zero

negative

positive

non-existing

Amount of heat required to raise the temperature of a body through 1 K is called its

Choose an answer

Specific heat

Water equivalent

Thermal capacity

Entropy

The unit of flux density is also given by

Choose an answer

Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

The nature of radiations emitted by a hot body depends upon its:

Choose an answer

Metarial

Temperature

colour

Volume

Length

The body will move with terminal velocity when it acquires

Choose an answer

minimum speed

zero speed

maximum speed

none of them

Silicon can be obtained from

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Lead

Uranium

An isotope of oxygen

Sand

Newton published laws of motion in his famous book "principia" in

Choose an answer

1867

1667

1676

1687

Amplitude in SHM is equivalent to ______ in circular motion:

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Diameter

Radius

Circumference

None of these

Intensity of light determines the:

Choose an answer

Energy of each photon

Number of photons

Speed of photons

Size of photons

None of these

The intensity of emitted energy (with wavelength) radiated from a black body at different temperatures was initially measured by:

Choose an answer

Lummer

Planck

Pringsheim

Both (A ) and (B)

Both (A) and (C)

The rectangular components of a vector are equal in magnitude when the vector makes and angle _______with their x-component:

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0°

30°

45°

60°

The velocity given to a body to go out of the influence of earth's gravity is known as:

Choose an answer

Terminal velocity

Orbital velocity

Escape velocity

None of these

The value of relative permittivity of different dielectrics are:

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Equal

Different

Greater than one

Smaller than one

Both (B) and (C)

The alternative voltage of current is actually measured by:

Choose an answer

Its RMS value

Square root of its mean square value

Instantaneous value

Peak value

Both (A) and (B)

Position and momentum of a particle cannot both be measured simultaneously with perfect accuracy. This is the statement of

Choose an answer

photoelectric effect

pair production

Compton effect

uncertainty principle

The unit of conductance is

Choose an answer

ohm

meter

mho

ohm-meter

The third band of the colour code:

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Gives the number of zeroes

Is decimal multiplier

Gives the resistance tolerance

Gives the third digit

Both (A) and (B)

The short distance between two points direction from its initial point to final point is called:

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Velocity

Displacement

Speed

Distance

Particles have the mass smallest of following is

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Electron

Proton

Neutron

Quark

The law of conservation of mass gives us the

Choose an answer

equation of continuity

Bernoulli's theorem

both of them

none of them

The number of translation degress of freedom for a diatomic gas is

Choose an answer

2

3

5

6

The maximum possible error in the reading for a meter rod with least count 1 mm is:

Choose an answer

0.005 mm

0.05mm

0.5mm

5.0mm

Aerodynamics is a branch of:

Choose an answer

Hydrodynamics

Thermodynamics

Both of them

Statics

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Choose an answer

Increase

Decrease

Remain F

Become 10F/9

In order to make a voltmeter, high resistance is connected with galvanometer, in

Choose an answer

perpendicular

may be paralled or pendicular

series

none of these

A typical rocket consists of fuel

Choose an answer

more than 60% of launch mass

less than 60% of launch mass

less than 80% of launch mass

more than 80% of launch mass

X-rays produced in a tube operating at 10⁵V. The speed of X-rays produced is

Choose an answer

3 x 10⁸m/s

3.1 x 10⁸m/s

2.8 x 10⁸m/s

1.88 x 10⁸m/s

The expression of Hook's law is

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F=ma

F=kx

F= -kx

-kx=ma

Curie is a unit of

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reluctance

resistivity

binding energy

radioactivity

An important part of photocopier is:

Choose an answer

Toner cartridge

Deflection plates

Charging electrode

Print head

None of these