Stoichiometry MCQs

Question 1

Othmer chart is useful in estimating the heat of

Accepted Answer

Adsorption

Answer

Mixing

Answer

Wetting

Answer

None of these

Question 2

Osmotic pressure of a dilute solution of a non volatile solute in a solvent obeying Raoult's law is proportional to the

Accepted Answer

Temperature

Answer

Volume of solution

Answer

Moles of non-volatile solute

Answer

None of these

Question 3

$$\frac{{{{	ext{C}}_{	ext{p}}}}}{{{{	ext{C}}_{	ext{v}}}}}$$ for monoatomic gases is

Accepted Answer

1.66

Answer

1.44

Answer

1.99

Answer

1

Question 4

For a given mass of a gas at constant temperature, if the volume 'V' becomes three times, then the pressure 'P' will become

Accepted Answer

$$\frac{{	ext{P}}}{3}$$

Answer

3P

Answer

9P 2

Answer

9P

Question 5

Atoms of the same element, but of different masses are called

Accepted Answer

Isotopes

Answer

Isobars

Answer

Isotones

Answer

None of these

Question 6

Unrestrained expansion of an ideal gas does not result in its cooling due to the reason that the gas molecules

Accepted Answer

Do not exert attractive force on each other

Answer

Do not lose energy on collision

Answer

Are above the inversion temperature

Answer

Do work equal to loss in kinetic energy

Question 7

The vapor pressure of a substance, at its melting point, is __________ in the solid state as compared to that in the liquid state.

Accepted Answer

Same

Answer

Less

Answer

More

Answer

Either A or B; depends on the nature of the substance

Question 8

A gas at 0°C is cooled at constant pressure until its volume becomes half the original volume. The temperature of the gas at this state will be

Accepted Answer

-136.5°C

Answer

- 136.5°K

Answer

-273°C

Answer

0°K

Question 9

1 BTU/ft 3 is approximately equal to __________ kcal/m 3 .

Accepted Answer

9

Answer

1

Answer

4

Answer

252