Question

Name the gas evolved:
(i) Action of dilute sulphuric acid to potassium sulphite
(ii) Addition of calcium hydroxide to ammonium chloride salt
(iii) Powdered lead metal is treated with concentrated caustic potash
(iv) Boiling calcium hydrogen carbonate
(v) Reaction between lead oxide & ammonia

Answer 1

Answer:

i Hydrogen Sulphide

ii ammonia

iìi hydrogen

iv Carbon dioxide

v nitrogen

Answer 2

(i) Sulfur Dioxide

(ii) Ammonia

(iii) Hydrogen

(iv) Carbon dioxide

(v) Nitrogen

Explanation:

(i) Potassium sulphite react with sulphuric acid to produce potassium bisulfate, sulfur dioxide gas and water.  

(ii) Calcium hydroxide react with ammonium chloride to produce calcium chloride, ammonia gas and water.

(iii) Lead reacts with strong aqueous alkalis such as NaOH to produce flammable hydrogen gas and sodium trihydroxoplumbate(II).

(iv) The thermal decomposition of calcium hydrogen carbonate produces calcium carbonate, carbon dioxide gas and water.

(v) Lead(II) oxide reacts with ammonia as follows to release nitrogen gas.