Hydrochloric acid reacts with a metal X to form a gas Y which burns with a 'pop' sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
(a) Name X and Y
(b) Write the chemical equation of the reaction of metal X with (i) Hydrochloric acid, and (ii) Sodium hydroxide solution.

Question

Hydrochloric acid reacts with a metal X to form a gas Y which burns with a 'pop' sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
(a)	Name X and Y
(b)	Write the chemical equation of the reaction of metal X with (i) Hydrochloric acid, and (ii) Sodium hydroxide solution.

MyClass24 · Accepted Answer

X is zinc metal and Y is hydrogen gas which makes a pop sound
(i) Zn(s) + 2HCl &rarr; ZnCl2 + H2

Zinc reacts with hydrochloric acid to give zinc chloride and hydrogen gas is liberated
(ii) 2NaOH(aq) + Zn &rarr; Na2ZnO2(aq) + H2
Zinc reacts with sodium hydroxide gives sodium zincate and hydrogen gas is evolved.