Correct Answer: Option C

Explanation

In contact with water, calcium carbide instantly decomposes hydrolytically, yielding acetylene gas and calcium hydroxide.

Calcium ethynide is also known as calcium carbide.

     CaC\(_2\)  +  2H\(_2\)O → Ca(OH)\(_2\) +  C\(_2\)H\(_2\)

There is an explanation video available below.

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