Chemical Engineering Mcqs Practice Test

Question 1

Which of the following gravity scales is used exclusively for liquids heavier than water ?

Accepted Answer

B. Twaddell scale

Question 2

1m3 is approximately equal to_________________?

Accepted Answer

B. 35 ft3

Question 3

In case of a solution (not of a solid in a liquid), whose total volume is more than the sum of volumes of its components in their pure states, solubility is__________________?

Accepted Answer

C. Decreased with the increase in pressure

Question 4

The forces causing the vaporisation of liquid are derived from the Kinetic energy of translation of its molecules. The heat of vaporisation_________________?

Accepted Answer

D. Both B. & C.

Question 5

_____________ fuels require the maximum percentage of ‘excess air’ for complete combustion ?

Accepted Answer

A. Solid

Question 6

Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution) ?

Accepted Answer

A. log (1/H+)

Question 7

Heat of transition is the heat evolved or absorbed, when a substance is converted from_________________?

Accepted Answer

D. One allotropic form to another allotropic form

Question 8

The vapor pressure of water at 100°C is__________________?

Accepted Answer

B. 76 cms of Hg

Question 9

The OH- concentration in a solution having pH value 3 is____________________?

Accepted Answer

C. 10-11

Question 10

Kinetic theory of gases stipulates that, the____________________?

Accepted Answer

C. Absolute temperature is a measure of the kinetic energy of molecules

Question 11

pH value of H2SO4 (5% concentration) is__________________?

Accepted Answer

D. < 7

Question 12

Raoult’s law is not applicable to the___________________?

Accepted Answer

C. Both B. & C.

Question 13

Heat of neutralisation of a strong acid and strong base is always a constant value, i.e., 57 KJ/Kg mole. This is because_________________?

Accepted Answer

C. Only OH- and H+ ions react in every case

Question 14

Heat of neutralisation of HCl and NaOH is – 57.46 kJ/Kg mole. The heat of ionisation of water will be _____________ kJ/Kg mole?

Accepted Answer

A. 57.46

Question 15

Which of the following is followed by an ideal solution ?

Accepted Answer

C. Raoult’s law

Question 16

The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ΔH = – 394 kJ/kg .mole CO + ½ O2 = CO2, ΔH = – 284.5 kJ/kg. mole. The heat of formation of CO is _____________ kJ/kg. mole?

Accepted Answer

A. -109.5

Question 17

Which of the following is not correct for a reversible adiabatic process ?

Accepted Answer

D. None of these

Question 18

Equation which relates pressure, volume and temperature of a gas is called the__________________?

Accepted Answer

A. Equation of state

Question 19

At triple point (for one component system), vapour pressure of solid as compared to that of liquid will be________________?

Accepted Answer

C. Same

Question 20

Mollier diagram is a plot of___________________?

Accepted Answer

C. Entropy vs. enthalpy