a.

Fractional crystallization in acid solution

b.

Dissolution in sodium hydroxide and filtration

c.

Extraction with concentrated ammonia and reprecipitation

d.

Electrolysis of molten mixture

a.

It is a covalent compound

b.

Strong cohesive forces make its ions immobile

c.

Strong cohesive forces make its molecules immobile

d.

Each of the potassium and chlorine ions has noble gas structure

a.

Hydrolysis

b.

Oxidizing

c.

Polymeriazation

d.

Reduction

a.

Sodium dioxonitrate(III) and ammonium chloride

b.

Sodium trioxinitrate(V) and ammonium chloride

c.

Sodium chloride and ammonium trioxonitrate(V)

d.

Sodium chloride and ammonium diozonitrate(III)