Stoichiometry MCQs

Question 1

Pick out the wrong statement:

Accepted Answer

The temperature at which a vapor is saturated is termed as the boiling point

Answer

A vapor is termed as a saturated vapor, if its partial pressure equals its equilibrium vapor pressure

Answer

A vapor whose partial pressure is less than its equilibrium vapor pressure, is termed as a 'superheated vapor'

Answer

The difference between the existing temperature of a vapor and its saturation temperature (i.e. dew point) is called its 'degree of superheat'

Question 2

If the absolute temperature of an ideal gas is tripled and simultaneously the pressure is reduced to one third; then the volume of gas will

Accepted Answer

Increase nine fold

Answer

Remain unaltered

Answer

Increase three fold

Answer

Decrease three fold

Question 3

With increase in the solute concentration, the specific heat of aqueous solutions

Accepted Answer

Decreases

Answer

Increases

Answer

Remains unchanged

Answer

Either A or B; depends on the type of solution

Question 4

A saturated vapor on being compressed would

Accepted Answer

Both A & B

Answer

Condense

Answer

Form wet steam

Answer

Neither A nor B

Question 5

500 c.c. each of hydrogen at 700 mm Hg pressure and oxygen at 600 mm Hg pressure are put together in a vessel of 1 litre capacity. The final pressure of the gas mixture will be __________ mm Hg.

Accepted Answer

650

Answer

700

Answer

600

Answer

375

Question 6

Which of the following has the least (almost negligible) effect on the solubility of a solute in a solvent?

Accepted Answer

Pressure

Answer

Temperature

Answer

Nature of solute

Answer

Nature of solvent

Question 7

NaOH contains __________ percent oxygen.

Accepted Answer

40

Answer

1

Answer

10

Answer

16

Question 8

Increasing the temperature of an aqueous solution will cause decrease in its

Accepted Answer

Molarity

Answer

Molality

Answer

Mole fraction

Answer

Weight percent

Question 9

The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the

Accepted Answer

Kopp's rule

Answer

Trouton's rule

Answer

Antonie equation

Answer

Kistyakowsky equation