What would you observe if excess of dilute NaOH solution is added and shaken with an aqueous solution of aluminium chloride?

1. A permanent white precipitate is formed immediately

2. No change at first but a white precipitate is formed on standing

3. A white precipitate is formed which later dissolves

4. A green precipitate which turns red on standing in air

Soda lime is:

1. Na₂CO₃ + CaO

2. NaOH + NaHCO₃

3. NaOH + CaO

4. NaH + Na₂CO₃

Among the following, which has minimum solubility in water?

1. KOH

2. CsOH

3. LiOH

4. RbOH

Caustic soda is:

1. Efflorescent

2. Deliquescent

3. Hygroscopic

4. Oxidant

Pearl ash and caustic potash are chemically:

1. K₂CO₃ and KOH

2. KOH and K₂CO₃

3. Na₂CO₃ and KOH

4. Na₂CO₃ and NaOH