Question # 1

Oxygen is ___________

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Metals

Non-metals

Gas

b & c

The property of being polar in nature is called:

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Polarity

Chemistry

Both

Nil

Solids are fixed ____________

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Shape

Velocity

Mass

Atoms

Concentration is ratio of:

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solvent to solute

solute to solution

solvent to solution

both a and b

The earth is made up of ____________ % of aluminum.

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6

7

8

9

Which one of the following pair has the same mass?

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1 mole of CO and 1 mole of N₂

1 mole of CO and 1 mole of CO₂

1 mole of O₂ and 1 mole of N₂

1 mole of O₂ and 1 mole of CO₂

N consist of ________________ sub shells.

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4

1

2

0

In volvox asexual cell produced:

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Daughter colonies

Sperm

Egg

All

Copper extracted from its ore is ____________ % pure.

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98%

99%

96%

Nil

"Atoms" means _________

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Divisible

Indivisible

Break

Nil

Atoms of elements combine chemically to form:

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Mixtures

compounds

solutions

ions

Binary compounds of oxygen such as CO2 and SO2 were names as acids by;

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Jabir Bin Hayan

Lavoisier

Al- Jahiz

Sir Humphrey Davy

A bound formed between two amino acids is:

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Peptide linkage

Covalent bound

Hydrogen bound

Glycosidic linkage

In the preparation of insoluble salts, which one of the facts is incorrect?

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Two soluble salts are mixed

Two in soluble salts are mixed .

One of the salt produced is insoluble

Both of the salts produced are insoluble

Pentahydroxy ketone is called as:

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Glucose

Fructose

Starch

Sucross

The green house effect is proportional to the amount of which gas in air.

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CO₂

O₂

N₂

All of them

Which acid is present in our stomach.

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Nitric acid

Hydrochloric acid

Sulphuric acid

All of these

Which gas is in involved in ozone depletion?

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Nitrogen

CFC's

Chlorine

All of them

The number of carbon atoms present in kerosene oil.

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8-12

9-12

10-12

11-12

Which of one the following is Lewis base?

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BF3

H+

NH3

Ag+

Which one of the following organic compound is found is gasoline?

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C₂H₄

C₃H₈

C₇H₁₀

C₁₂H₂₆

The color of Fe(OH)₂ ppt is.

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White

Brown

Muddy green

Blue

Which properties of liquid is measured by polarimeter

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Conductance

Refractive index

Optical activity

Change in volume

The atomis radius is of the order of

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10^-8cm

10⁸cm

10^-12cm

10^-10cm

When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded by H2O molecule, This process is known as.

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Hydrolysis

Hydration

Saturation

solvolysis

An atomic orbital has l =1 , m =+1, 0, -1, n = 3 than which one of the following atomic orbital has such values.

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2s

2p

3p

3d

Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0 ^oC

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546 ^oC

200 ^oC

546 K

273 K

The comparative rates at which the solutes move in paper chromatography, depends on

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The size of paper used

Their R_fvalues

Their partition coefficients

The polarity of solvent used

Electrolysis is used for

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Electroplating

Refining of copper

Manufacture of caustic soda

All of the above

The substance which decrease the activity of a catalyst is called.

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Promoter

Activator

Inhibitor

Positive catalyst

The ration of number of molecules of 2 g H2 g to number of molecules of 64 g gaseous oxygen is.

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1:1

1:2

1:32

1:4

Which one of the following salts dissolved in water to form a solution with a pH greater than 7

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NaCl

CuSO4

Na2CO3

NH4Cl

n+1 value of 6d orbital is.

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08

09

10

18

Catalyst used in thermal cracking

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Platinum

Nichel

Al2O3 and SiO2

Fe2O3 and CuO

Which one of the followings is woody raw material used for making pulp and paper

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Eucalyptus

Wheat straw

Bagasse

Cotton linter

Out of all the elements of Group V-A the highest ionization energy is possessed by

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N

P

Sb

Bi

The strength of binding energy of transition elements depends upon

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number of electron pairs

number of unpaired electron pairs

number of neutrons

number of protons

Which enzyme is not involved in fermentation of starch.

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Diastase

Zymase

Urease

Invertase

What is Glacial acetic acid

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Pure acetic acid

95% acetic acid

a mixture of acetic acid and glycerol

Vinegar

Gold dissolves in "Aqua Regia" due to formation of Halide. Point out correct halide

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AuF₃

AuCl₃

AuBr₃

AuI₃

Starch is polymer is

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Fructose

a -d Glucose

Sucrose

B-D-Glucose

Chlorobenzene on nitration with conc. HNO3 and Conc. H2SO4 gives.

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m -chloronitrobenzene

o and p chloronitrobenzene

o and m chloronitrobenzene

mixture of O2 m and p chloronitrobenzene

Thickness of the atmosphere is

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100 km

500 km

1000 km

1500 km

Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone.

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Primary alcohol

Secondary alcohol

Tertiary alcohol

Dehydrin alcohol