Question

A solution reacts with zinc granules to give a gas which burns with a 'pop' sound. The solution contains
(a) Mg(OH)2
(b) Na2CO3
(c) NaCl
(d) HCl

Answer 1

The answer is HCl or hydrochloric acid
Any acid when added to a metal results in the evolution of hydrogen gas
The test for hydrogen evolution is bringing a candle close to the test tube with hydrogen. It is extinguished with a pop sound. If it was a larger flame or if a lot hydrogen was evolved well ...... there would be a blast.

Answer 2

Answer:

HCL is your answer guys