Chemical Engineering Mcqs Practice Test

Question 1

1 kg of calcium carbide (CaC2) produces about 0.41 kg of acetylene gas on treatment with water. How many hours of service can be derived from 1 kg of calcium carbide in an acetylene lamp burning 35 litres of gas at NTP per hour ?

Accepted Answer

B. 10

Question 2

Addition of a non-volatile solute to a solvent produces a ______________ in its solvent?

Accepted Answer

C. Vapor pressure lowering

Question 3

With increase in the temperature of pure (distilled) water, its____________________?

Accepted Answer

B. pOH and pH both decreases

Question 4

6 gms of magnesium (atomic weight = 24), reacts with excess of an acid, the amount of H2 produced will be ______________ gm?

Accepted Answer

A. 0.5

Question 5

Boiling point of a solution as compared to that of the corresponding solvent is _________________?

Accepted Answer

B. More

Question 6

Number of gm moles of solute dissolved in 1 kg of solvent is called its___________________?

Accepted Answer

C. Molality

Question 7

Assuming that CO2 obeys perfect gas law, calculate the density of CO2 (in kg/m3) at 263°C and 2 atm ?

Accepted Answer

B. 2

Question 8

1 Pascal (unit of pressure) is equal to _______________ N/m2 ?

Accepted Answer

B. 1

Question 9

Pick out the wrong unit conversion of mass transfer co-efficient?

Accepted Answer

D. 1 kg/hr.m2 = 4.8823 lb/hr.ft2

Question 10

Heat of solution in a system in which both solute and solvent are liquids is termed as_________________?

Accepted Answer

D. Heat of mixing

Question 11

The vapor pressure of liquids of similar chemical nature at any particular temperature _______________ with increase in the molecular weight?

Accepted Answer

B. Decreases

Question 12

A chemical process is said to occur under unsteady state, if the_________________?

Accepted Answer

C. Flow rates & composition both are time dependent

Question 13

N.T.P. corresponds to__________________?

Accepted Answer

A. 1 atm absolute pressure & 0°C

Question 14

‘Giga’ stands for__________________?

Accepted Answer

A. 109

Question 15

Gases having same reduced temperatures and reduced pressures_________________?

Accepted Answer

C. Both A. and B.

Question 16

According to Raoult’s law, “The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component.” Raoult’s law is not applicable under the following assumption/condition?

Accepted Answer

C. In the formation of solution, chemical combination/molecular association between unlikemolecules takes place

Question 17

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

Accepted Answer

A. Basic

Question 18

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

Accepted Answer

C. Both A. and B.

Question 19

1 gm mole of methane (CH4) contains_________________?

Accepted Answer

B. 4 gm atoms of hydrogen

Question 20

If pH value of an acidic solution is decreased from 5 to 2, then the increase in its hydrogen ion concentration is _____________ times?

Accepted Answer

C. 1000