Question # 1

The mathematical formula of Boyle's law is:

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PV = k

PT = k

V = kT

T = Vk

Diamonds exists in ____________ form.

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Cubic

Linear

Circular

Nil

Which is used for industrial manufacture of NaCI?

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Daniel cell

Down's cell

Nelson's cell

None of these

A heterogeneous mixture of different substance are called:

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Solution

Suspension

Colloids

Nil

Salt & water is a _________ mixture.

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Homogeneous

Heterogeneous

It is not mixture

Nil

NaCl + H2O is ____________ solutions.

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Aqueous

Binary

H2O

Nil

The atomic number of potassium is:

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11

15

18

19

Atoms are arranged in ________________ structure in Bucky balls.

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Hollow

Cage

A & B

Nil

Potassium's atomic no. is :

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17

18

19

20

The core of the earth is ____________ than crust.

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LIghter

Heavier

Both

Nil

Ethyl butanoate smells like.

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Apple

Pine apple

Lemon

Melon

When copper pyrite (CuFeS2) is strongly heated in excess of airit converted into mixture of:

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Cu2S + Cu2O

Cu2O +FeS

Cu2S + FeS

FeO + SO2 + Cu2S

when a system is in equilibrium state or in dynamic equilibrium state.

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Reactants and product are equal

Forward reactions stops

Reverse reactions stops

Forward reaction rate and reverse reaction rate

Which one of the following statements is not correct about active mass?

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Rate of reaction is directly proportional to activ emass.

Active mass is taken in molar concentration

Active mass is represented by square brackets

Active mass means total mass of substances.

Which one of these is used as anaesthesia?

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carbon black

Mehtane

Ethane

Chloroform

The source of galactose.

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Fruits

Vegetables

Cereals

All of them

A disease is caused by excess of bile pigments in the blood is.

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Typhoid

Jaundice

Cholera

Dysentery

Dilute acid react with carbonates the produce product except _________

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Salt

Water

Carbon di oxide

Hydrogen gases

Which element do not causes toxicity in water?

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Lead

Arsenic

Sodium

Mercury

Which one of the following is Lewis base?

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NH₃

BF₃

H⁺

AlCl₃

What has a mass equal to that of one mole of water.

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22.4 dm3 of water

One mole of steam

One molecule of water

Two moles of hydrogen molecules and one mole of oxygen molecules.

The bond order of N2 molecule is.

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1

2

3

4

The volume occupied by 16 g of CH4 at S.T.P.

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224.14 dm3

22.4 dm3

1.12 dm3

2.24 dm3

The nature of positive rays depends on

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The nature of electrode.

The nature of discharge tube

The nature of residual gas

All of the above

pH of buffer is calculated by.

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Sorenson equation

Mosley equation

Henderson equation

De broglie equation

The number of moles of CO₂which contain 8.0 g of oxygen

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0.25

0.50

1.0

1.50

n+1 value of 6d orbital is.

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08

09

10

18

The paramagnetic behaviour of oxygen is well explaned on the basis of.

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M.O Theory

N.B Theory

VSEPR Theory

CF theory

Heat of solution of an ionic compound is equal to.

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Hydration energy

Lattice energy

Slum of both 'a' and 'b'

Difference of both a and b

Rate of a chemical reaction generally increase rapidly even for small increase in temperature because of rapid increase in the

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Collisions frequency

Activation energy

Average KE of molecules

Fraction of molecules with energies more than activation energy

Which of the following sulphates is not soluble in water.

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Sodium sulphate

Potassium sulphate

Zinc sulphate

Barium Sulphate

Chemical formula of stibnite on.

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BaSO4

Sb2S3

FeS2

ZnS

SN2 mechanism involves

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1st order kinetic

2nd order kinetic

3rd order kinetic

Zero order kinetic

Which compound is more soluble of water

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C2H5OH

C6H5OH

CH3OCH3

n- Hexanol

In group VA elements the most electronegative elements is.

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Sb

N

P

As

Which compound will have the maximum repulsion with water

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C₆H₆

C₂H₅OH

C₃H₇OH

CH₃OCH₃

The aqueous solution of which substances is green in colour

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K2CrO4

K2CrO7

KMnO4

K2MnO4

Third abundant element on earth crust is.

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Boron

Oxygen

Aluminium

Silicon

One of following is argillaceous material

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Marble

Clay

Lime

Marine Shell

Which one of the following sets has coinage metaals is it.

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Cu, Hg, Au

Cu, Ag, Au

Ag, Au, Hg

Cu, Fe, Au