Industrial Salts I: Chlor-Alkali and Bleaching Powder

Section A: Chlor-Alkali Process and Sodium Hydroxide

Question 1mcq

The chlor-alkali process is electrolysis of aqueous:

A.

CaSO_4

B.

NaCl

C.

Na_2CO_3

D.

NaHCO_3

Question 2mcq

Which gas is formed at the cathode in the chlor-alkali process?

A.

CO_2

B.

H_2

C.

O_2

D.

Cl_2

Question 3mcq

Which gas is formed at the anode in the chlor-alkali process?

A.

H_2

B.

Cl_2

C.

O_2

D.

CO_2

Question 4mcq

The alkali formed in the chlor-alkali process is:

A.

HCl

B.

CaCO_3

C.

NaOH

D.

NaHCO_3

Question 5mcq

Why is it called chlor-alkali process?

A.It produces chlorine and an alkali

B.It produces only acid

C.It produces only salt

D.It removes all ions

Question 6mcq

A use of sodium hydroxide is:

A.Making soaps and detergents

B.Making plaster casts directly

C.As the main gas in balloons

D.As dry ice

Section B: Bleaching Powder

Question 7mcq

Bleaching powder is commonly represented as:

A.

NaHCO_3

B.

CaSO_4 \cdot rac{1}{2}H_2O

C.

CaOCl_2

D.

Na_2CO_3 \cdot 10H_2O

Question 8mcq

Bleaching powder is prepared by passing chlorine over:

A.Washing soda

B.Gypsum

C.Dry slaked lime

D.Baking soda

Question 9mcq

Preparation of bleaching powder is:

A.

NaCl + H_2O \rightarrow NaOH + HCl

B.

Ca(OH)_2 + Cl_2 \rightarrow CaOCl_2 + H_2O

C.

NaHCO_3 \rightarrow Na_2CO_3

D.

CaCO_3 \rightarrow CaO + CO_2

Question 10mcq

Bleaching powder is used for:

A.Making bread rise

B.Making plaster casts

C.Softening hard water only

D.Disinfecting drinking water

Question 11mcq

Bleaching powder bleaches because it releases:

A.Nitrogen

B.Hydrogen

C.Carbon dioxide only

D.Chlorine

Question 12mcq

Which use is correctly matched?

A.Bleaching powder — bone casts

B.Bleaching powder — antacid

C.Bleaching powder — baking cakes

D.Bleaching powder — bleaching cotton and linen