Question

Write your observations for the following chemical reactions and name the products formed :

(a) When sugar is heated.

(b) When manganese dioxide is added to potassium chlorate and heated.

(c) When dilute acetic acid is poured on baking soda.

(d) When an aqueous solution of sodium chloride is mixed with an aqueous solution of silver nitrate.

(e) When ammonium chloride is heated with sodium hydroxide.

(f) When water is added to quick lime?

Answer 1

(a) ***** solid mass (charcoal) is formed along with water vapours.

(b) Manganese dioxide acts as a catalyst for the decomposition of potassium chlorate into potassium chloride and oxygen at a lower temperature.

(c) Sodium acetate, CO2 and water are formed.

(d) A white insoluble solid precipitate of silver chloride is formed along with Sodium nitrate.

(e) When solid ammonium chloride is heated with sodium hydroxide solution, a gas ammonia is evolved which is recognised by its strong pungent smell.

(f) When water is added to quick lime, a large amount of heat energy is evolved.