Chemical Engineering Mcqs

“The total volume occupied by a gaseous mixture is equal to the sum of the pure component volumes”. This is the _____________ law?

• (A)  Dalton’s
• (B)  Amagat’s
• (C)  Gay-Lussac’s
• (D)  Avogadro’s

Answer

Submitted By :Ali Uppal

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

• (A)  Baume scale
• (B)  Twaddell scale
• (C)  API scale
• (D)  None of these

Answer

Submitted By :Ali Uppal

1m3 is approximately equal to_________________?

• (A)  28 litres
• (B)  35 ft3
• (C)  4.5 litres
• (D)  4.5 ft3

Answer

Submitted By :Ali Uppal

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__________________?

• (A)  Independent of the temperature
• (B)  Increased with the increase in pressure
• (C)  Decreased with the increase in pressure
• (D)  Unchanged by the pressure change

Answer

Submitted By :Ali Uppal

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

• (A)  Increases with pressure rise
• (B)  Decreases with increasing pressure
• (C)  Becomes zero at the critical point
• (D)  Both

Answer

Submitted By :Ali Uppal

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

• (A)  Solid
• (B)  Liquid
• (C)  Gaseous
• (D)  Nuclear

Answer

Submitted By :Ali Uppal

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

• (A)  log (1/H+)
• (B)  – log (1/H+)
• (C)  1/log H+
• (D)  None of these

Answer

Submitted By :Ali Uppal

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

• (A)  Vapor to liquid
• (B)  Vapor to solid
• (C)  Solid to liquid
• (D)  One allotropic form to another allotropic form

Answer

Submitted By :Ali Uppal

Gases diffuse faster compared to liquids because of the reason that the liquid molecules_________________?

• (A)  Are held together by stronger inter-molecular forces
• (B)  Move faster
• (C)  Have no definite shape
• (D)  Are heavier

Answer

Submitted By :Ali Uppal

If the pressure of a gas is reduced to half & its absolute temperature is doubled, then the volume of the gas will_________________?

• (A)  Be reduced to 1/4th
• (B)  Increase four times
• (C)  Increase two times
• (D)  None of these

Answer

Submitted By :Ali Uppal