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51.

The principal raw material for the production of chlorine gas by mercury electrolytic cell is

A.	saturated NaCI solution only	B.	saturated NaCI solution with solid NaCI make-up
C.	solid NaCI only	D.	90-92% NaCI solution

52.

Acids are substances that yield H+ in acqueous solutions while bases yield OH?ions. In a neutral solution

A.	there are no H+	B.	there are no OH?
C.	H+ and OH- are present in very small but equal concentration	D.	[H+] + [OH-] = 1

53.

Graphite is

A.	an allotropic form of carbon	B.	used as moderator in nuclear reactors
C.	an electrical conductor	D.	all of the above

54.

In an oxidation process

A.	oxidation number decreases	B.	number of electrons decreases
C.	oxygen content decreases	D.	number of ions decreases

55.

In a reduction process

A.	oxidation number decreases	B.	number of electrons decreases
C.	oxygen content decreases	D.	number of ions decreases

56.

During the electrolysis of sodium chloride the anodic reaction is

A.	oxidation of sodium ions	B.	reduction of sodium ions
C.	oxidation of chloride ions	D.	reduction of chloride ions

57.

Soda ash is also called

A.	sodium carbonate	B.	sodium hydroxide
C.	sodium bicarbonate	D.	sodium oxide

58.

Washing soda is

A.	Na2CO3.10H2O	B.	Na2CO3
C.	Na2CO3.H2O	D.	Na2CO3.2H2O

59.

Potassium carbonate is not prepared by the Solvy process because

A.	potassium bicarbonate is unstable	B.	potassium bicarbonate is soluble is water
C.	potassium bicarbonate is soluble in ammonium chloride and potassium chloride solutions	D.	potassium bicarbonate does not decompose on heating

60.

Grignard reagent is

A.	ethyl magnesium chloride	B.	ethyl chloride
C.	sodium sulphate	D.	sodium cabonate