Question # 1

Compound which undergo sublimation is

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KMnO4

CaCO3

NH4Cl

Na2CO3

Cadmium has isotopes.

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3

4

5

9

Vapour pressure of a substance does not depend upon.

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Temperature

Intermolecular forces

Surface area

Physical state of water

Conduction of electricity through gases under reduced pressure is due to the transportation of.

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positive charge

Negative charge

Both types of charges

None of these

NH3 shows a maximum boiling point among the hydrides of V-A group elements due to.

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Very small size of nitrogen

Lone pair of electron present on nitrogen

enhanced electronegative character of nitrogen

Pyramidal structure of NH3

The power of which the concentration of a substance appears in the rate expression is known as

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order of reaction with respect to that substance

Rate of reaction

Order of reaction

Molecularity of reaction

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

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546 ^oC

200 ^oC

546 K

273 K

A pressure cooker reduces cooking time because.

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Heat is uniformly distributed

Boiling point of water rises

A large flame is used

Vapour pressure of liquid reduces

In order to mention the oiling point of water at 110 ^oC, the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

Relative lowering of vapour pressure is equal to.

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Mole fraction of solute

Mole fraction of solvent

Mole fraction of solute and solvent

Molality of solution

When a non-spontaneous redox reaction is carried out by using the electrical current, then the process is called

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Decomposition of the substances

Cracking

Hydrolysis

Electroiysis

In azeotropic mixture showing positive deviation from Raoult's law, the volume of the mixture is.

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slightly more than the total volume of the components

Slightly less than the total volume of the component

Equal to the total volume of the components

None of these

Which substance is nto a dehydrating agent.

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CaCl3

CdCl2

Silica gel

P2O5

the value of delta H and delta E for liquids and solids is almost same because.

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No change in temperature

Heat absorbed

No change in volume

Heat evolved

Which process is endothermic and spontaneous

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Neutralization of NaOH with HCl

Formation of NH3 from H2 and N2

Formation of H2O from H2 and O2

Evaporation of sea water

The deviation of a gas from ideal behavior is maximum at.

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-10 ^oC and 5.0 atm

-10^oC and 2 atm

0^oC and 2 atm

100^oC and 2 atm

Melting of ice can be forwarded by the use of.

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LiCl

BeCl2

NaCl

Ag Cl

In discharge tube, properties of X-rays depend upon the nature of.

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Residual gas

Cathode plate

Anode plate

All of these

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