6. Metals with acids and bases

Go through the following question and provide the answer:
 
A metal X is added to a strong acid Y. Bubbles of gas are evolved and a salt Z is formed. When a burning candle is brought near the gas, a “pop” sound is heard.

Identify X, Y, and Z.
 
i. X is
 
ii. Y is
 
iii. Z is
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