Chemical Process MCQs

Question 1

Which of the following is the second major component of cement?

Accepted Answer

SiO 2

Answer

Al 2 O 3

Answer

CaO

Answer

Fe 2 O 3

Question 2

Which is the main reducing agent during production of iron from iron ore in a blast furnace?

Accepted Answer

CO

Answer

C

Answer

CO 2

Answer

H 2

Question 3

In multistage equilibrium conversion of SO 2 to SO 3 (2SO 2 + O 2 ⇋ 2SO 3 ), the reverse reaction becomes appreciable at a temperature of 550°C. The percentage equilibrium conversion of SO 2 to SO 3 can be increased by

Accepted Answer

Removing some quantity of SO 3 during intermediate stage

Answer

Increasing the oxygen concentration

Answer

Putting more quantity of V 2 O 5 catalyst in the converter

Answer

Maintaining low temperature & pressure in the converter

Question 4

Na 2 CO 3 is called

Accepted Answer

Soda ash

Answer

Washing soda

Answer

Plaster of paris

Answer

Calcite

Question 5

Argon is the third largest constituent of air (followed by N 2 & O 2 ). Its percentage by volume in air is

Accepted Answer

0.94

Answer

0.14

Answer

0.34

Answer

1.4

Question 6

Main constituent of limestone is

Accepted Answer

CaCO 3

Answer

MgCO 3

Answer

Na 2 CO 3

Answer

CaSO 4

Question 7

CaSO 4 .$$\frac{1}{2}$$ H 2 O is known as

Accepted Answer

Plaster of Paris

Answer

Blue vitriol

Answer

Gypsum

Answer

Zeolite

Question 8

Cooking liquor in case of sulphite process is

Accepted Answer

Sodium sulphite and sodium bisulphite

Answer

Magnesium sulphite and free SO 2 in acid medium

Answer

Magnesium sulphate and magnessium bicarbonate

Answer

None of these

Question 9

Pick out the wrong statement pertaining to nitric acid.

Accepted Answer

Arc process of nitric acid manufacture is economical as compared to Ostwald

Answer

About 90% of nitric acid is manufactured by Ostwald

Answer

It is a strong mono basic acid which reacts with almost all the metals except noble metals

Answer

Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO 2 )