Question # 1

The born Haber cycle is the best application of law.

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Boyle's

Dalton's

Hess's

Graham's

The real gas obeying Van der Waal's equation will resemble ideal gas is.

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both 'a' and 'b' are large

both 'a' and 'b' and small

'a' is small and 'b' is large

'a' is large and 'b' is small

The influence of temperature on reaction rate is predicated by

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Free energy change of reaction

Arrhenius equation

Van der weal's equation

Kinetic equation

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.

In triclinic unit cell

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All axial lengths are equal

All internals lengths and angles are equal

Both axial lengths and angles are equal

Both axial lengths and angles are unequal

In paper chromatograghy the point at which the solvent rises to maximum extent is called

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Event

Chromatogram

Solvent front

Base line

BF3 has zero while NH3 has 1.49 D dipole moment because.

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B is less electronegative than N

F is more electronegative than N

BF3 is pyramidal while NH3 is planar

NH3 is pyramidal while BF3 is trigonal planar

At equilibrium stage of chemical reaction

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The concentration of reaction is equal to concentration of products

The rate constant of forward reaction is equal to rate constant of backward reaction

The rate of forward reaction is equal rate of backward reaction

The energy of activation of forward step is equal to energy of activation of backward step

The distillation of a solution under reduced pressure is called

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Fractional distillation

Destructive distillation

Distillation

Vacuum distillation

Solvent extraction method is particularly useful technique for separation when the product to be separated is

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Non-volatile or thermally unstable

Volatile or thermally unstable

Non-volatile or thermally stable

Volatile or unstable

The number of electrons in one mole of hydrogen gas is.

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6.02 x 10²³

12.04 x 10²³

Only two

Indefinite

The change in heat energy of a chemical reaction at constant temperature and pressure is called.

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Enthalpy change

Bond energy

Heat of sublimation

Internal energy change

Standard hydrogen electrode has an arbitrarily fixed potential

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0.00 volts

1.00 volt

0.10 volt

None of these

the number of moles of CO2 which contain 8.0 g of oxygen.

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0.25

0.50

1.0

1.50

What amount of NaOH is required to prepare 500 g of 0.5 molal solution.

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10 g

20 g

30 g

40 g

If absolute temperature of the gas is doubled and the pressure is reduced to one half the volume the gas will.

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Remains uncharged

Increase four time

Reduce to 1/4

Be doubled

How many balloon of 0.25 dm3 capacity at 1 atmospheric pressure can be filled from a hydrogen gas cylinder of 5 dm3 capacity at 10 atmospheric pressure.

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50

90

180

200

Calorie is equivalent to

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0.4184 J

41.84 J

4.184 J

418.4 J

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