Question

4. A solution reacts with zinc granules to give a gas which burns with a pop sound. The solution contains this agent.
(a) Magnesium hydroxide
(b) Sodium carbonate
(c) Sodium chloride
(d) Sodium hydroxide​

Answer 1

Answer: Sodium hydroxide

Explanation: we know when a metal reacts with a acid or base than a gas is formed which burns with a pop up sound this gas is called hydrogen. It's formula is H2. You can do this practical at home but be careful while doing this so much heat is produced. You can add a little amount of water than sodium hydroxide and stir it well and add some pieces of aluminum foil and fit a balloon on it when reaction will settle down then balloon will fly because hydrogen is lighter from air.

Answer 2

4. A solution reacts with zinc granules to give a gas which burns with a pop sound. The solution contains this agent.

(a) Magnesium hydroxide

(b) Sodium carbonate

(c) Sodium chloride

(d) Sodium hydroxide✔