1. Ammonia gas can be prepared using sodium hydroxide and ammonium chloride.

(a)	True
(b)	False

2. Ammonia gas can be dried using __________________

(a)	Concentrated sulphuric acid
(b)	Calcium oxide
(c)	Anhydrous calcium oxide

3. Why is the filter funnel used when dissolving ammonia?

(a)	To provide large surface area for absorption of ammonia gas and prevent 'suck back'
(b)	To increase the temperature and make ammonia dissolve faster at high temperature.