Question # 1

Gases deviate from ideal behaviour at high pressure. Which of the following is correct for non-ideal behaviour of gases

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At high pressure, the gas molecules move in one direction only

At high pressure, the collisions between the gas molecules are increased

At high pressure, the volume of the gas becomes insignificant

At high pressure, the intermolecular attraction becomes significant

Most of the reaction which give stable products are

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Exothermic

Endothermic

Isothermal

None of these

A chemical change always involve

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Absorption of heat

Evolution of heat

Either absorption or evolution of heat

The liberation of heat and light energy

NaCI and sand can be separated by one of the following without filtration

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Formation of solution and filtration

Formation of solution and evaporation without filtration

Sublimation

Chromatiograghy

The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as.

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Voltaic cell

Denial cell

dry Cell

Electrolytic cell

After 3 half life of a chemical reaction, amount of reactant un reactive will be.

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50%

25%

12.5%

6.25%

A solution will be unsaturated if

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Ionic product = Kap

Ionic product < Ksp

Ionic Product > Ksp

both 'a' and 'b' are correct

Which statement is correct about solubility product constant.

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It is applicable at highly soluble substances.

Value of Kap is independent of temperature

It is used for homogeneous aquarium system

It can be used to predict that precipitation will take place or not by combining two ions

Which statement is incorrect about activated complex

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Short lived

Maximum energy

Unstable combination of atoms

Less energy than Ea

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Fe is reduced

Fe is oxidized

CI₂is oxidized

None of these

I molar volume of a gas at S.T.P is occupied by

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1 g of gas

6 x 10²³g of gas

22.4 m³of gas

1 gram molecular mass of gas

A material or a collection of materials which is under study is called

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State function

Degree and joule

Degree and ergs

Calorie and joule

A single lead cell provides volts

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2

4

6

8

Azeotropic mixture can be separated into pure components by

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Distillation

Fractional distillation

Vacuum distillation

None

the substance which increase the rate of reaction but remains unchanged at the end of the reaction is called.

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Indicator

Promoter

Catalyst

Activated complex

Which is pseudo solid

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CaF2

Glass

NaCl

CaCl2

During chromatography strip should be dipped into solvent mixture to a depth of.

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3-4 mm

4-5 mm

5-6 mm

6-7 mm

the volume occupied by 1.4 of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

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