Ammonia icse 10 quiz

Ammonia is prepared in the laboratory by heating:

• Ammonium chloride and sodium hydroxide

• Ammonium chloride and calcium hydroxide

• Ammonium sulphate and sodium hydroxide

• Ammonium nitrate and lime

In the laboratory preparation of ammonia, calcium hydroxide is preferred to sodium hydroxide because it is:

• Cheaper and less hygroscopic

• Stronger alkali

• More soluble in water

• Easily available as liquid

Which gas is dried by quicklime (CaO) during its preparation?

• Hydrogen chloride

• Carbon dioxide

• Ammonia

• Sulphur dioxide

Quicklime is used as a drying agent for ammonia because it:

• Absorbs moisture without reacting with ammonia

• Absorbs ammonia gas

• Reacts with ammonia to form calcium nitride

• Decomposes ammonia

Ammonia cannot be collected over water because:

• It is heavier than water

• It reacts with water

• It is highly soluble in water

• It is insoluble in water

The suitable method to collect ammonia gas is:

• Upward displacement of air

• Downward displacement of air

• Upward displacement of water

• None of these

Ammonia gas is lighter than air because:

• It contains less nitrogen

• Its molecular mass is lower than air’s average molar mass

• It is more soluble in water

• It is colourless

The ratio of ammonia molecules to nitrogen atoms in NH₃ is:

• 1:2

• 2:1

• 1:3

• 3:1

In the Haber's process, ammonia is obtained by combining:

• N₂ and H₂ in 1:2 volume ratio

• N₂ and H₂ in 1:3 volume ratio

• N₂ and H₂ in 2:1 volume ratio

• N₂ and H₂ in 3:1 volume ratio

The catalyst used in Haber’s process is:

• Vanadium pentoxide

• Finely divided iron with molybdenum as promoter

• Platinum gauze

• Manganese dioxide