Stoichiometry MCQs

Question 1

The temperature at which the second Virial co-efficient of a real gas is zero is called the

Accepted Answer

Eutectic point

Answer

Boyle temperature

Answer

Boiling point

Answer

Critical temperature

Question 2

For the gaseous phase reaction, N 2 + O 2 ⇋ 2NO, ΔH = + 80 kJ/kg.mole; the decomposition of NO is favoured by

Accepted Answer

Decrease in temperature

Answer

Increasing the concentration of N 2

Answer

Increase in pressure

Answer

Decrease in pressure

Question 3

The pH value of a solution is 5.9. If the hydrogen ion concentration is decreased hundred times, the solution will be

Accepted Answer

Basic

Answer

More acidic

Answer

Neutral

Answer

Of the same acidity

Question 4

__________ kg of CaCO 3 on heating will give 56 kg of CaO.

Accepted Answer

100

Answer

56

Answer

144

Answer

1000

Question 5

The unit of dynamic viscosity is

Accepted Answer

Both B & C

Answer

Stoke

Answer

Poise

Answer

Gm/cm sec

Question 6

Pick out the wrong unit conversion of heat transfer co-efficient.

Accepted Answer

1 kcal/m 2 .hr.°K = 1.163 W/m 2 .°C

Answer

1 kcal/m 2 .hr.°C = 0.2048 BTU/ft 2 .hr.°F. = 1.163 W/m 2 .°K

Answer

1 W/m 2 .°C = 0.1761 BTU/ft 2 .hr.°F

Answer

1 BTU/ft 2 .hr.°F = 4.88 kcal/m 2 .hr.°C = 20.44 kJ/m 2 .hr°C = 5.678 W/m 2 .°C

Question 7

Simultaneous doubling of the absolute temperature of a gas and reduction of its pressure to half, will result in __________ in the volume of the gas.

Accepted Answer

Doubling

Answer

No change

Answer

$${\frac{{	ext{L}}}{4}^{{	ext{th}}}}$$ reduction

Answer

Four fold increase

Question 8

An azeotropic solution of two liquids has boiling point lower than either of them, when it

Accepted Answer

Shows positive deviation from Raoult's law

Answer

Is saturated

Answer

Is unsaturated

Answer

Shows negative deviation from Raoult's law

Question 9

In case of an unsaturated vapor-gas mixture, the humid volume increases with increase in the

Accepted Answer

Both A & B

Answer

Total pressure

Answer

Absolute humidity at a given temperature

Answer

Neither A nor B