Chemical Engineering Mcqs Practice Test

Question 1

If the partial pressure of the solvent in the vapor phase is equal to the vapor pressure of the solvent at that temperature, then the system is said to be at its___________________?

Accepted Answer

D. Both B. and C.

Question 2

Saturated solution of benzene in water is in equilibrium with a mixture of air and vapours of benzene and water at room temperature and pressure. Mole fraction of benzene in liquid is xB and the vapour pressures of benzene and water at these conditions are pv B and pv w respectively. The partial pressure of benzene in air-vapour mixture is_________________?

Accepted Answer

B. xB.PvB

Question 3

1 torr is equal to ______________ mm Hg column?

Accepted Answer

A. 1

Question 4

The quantity of heat required to evaporate 1 kg of a saturated liquid is called __________________?

Accepted Answer

D. Latent heat

Question 5

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

Accepted Answer

C. Do not exert attractive force on each other

Question 6

Which of the following is not a colligative property ?

Accepted Answer

D. None of these

Question 7

Total energy at a point comprises of _____________ energy?

Accepted Answer

D. All A., B. & C.

Question 8

The temperature of a gas in a closed container is 27° C. If the temperature of the gas is increased to 300° C, then the pressure exerted is___________________?

Accepted Answer

D. Unpredictable

Question 9

A gas mixture contains 6 moles of H2 and 2 moles of N2. If the total pressure of the gaseous mixture is 4 kgf/cm2; then the partial pressure of N2 in the mixture will be _____________ kgf/cm2 ?

Accepted Answer

A. 1

Question 10

Hess’s law of constant heat summation is based on conservation of mass. It deals with ___________________?

Accepted Answer

C. Changes in heat of reaction

Question 11

In a neutral solution _________________?

Accepted Answer

C. Both H+ and OH- ions are present in very small but equal concentration

Question 12

Number of gm moles of solute dissolved in one liter of a solution is called its____________________?

Accepted Answer

B. Molarity

Question 13

A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?

Accepted Answer

B. 0.33

Question 14

Vapor pressure of a solution is proportional to (where, Sv and St are mole fraction of solvent and solute respectively) ?

Accepted Answer

A. Sv

Question 15

The value of gas constant ‘R’ is ______________ kcal/kg.mole.°C?

Accepted Answer

D. None of these

Question 16

In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure?

Accepted Answer

D. All A., B. & C.

Question 17

Unit of mass velocity is___________________?

Accepted Answer

B. kg/m2.hr

Question 18

Elements in a periodic table are arranged in order of their__________________?

Accepted Answer

A. Atomic number

Question 19

The most convenient way of expressing solution concentration is in terms of___________________?

Accepted Answer

D. Molarity

Question 20

Disappearance of snow in subzero weather exemplifies the process of_________________?

Accepted Answer

B. Sublimation