Correct Answer: Option D

Explanation

When ammonia (NH\(_3\)) gas reacts with hydrogen chloride (HCl) gas, they form solid ammonium chloride (NH\(_4\)Cl), observable as white fumes or clouds. 

The reaction is a neutralization reaction where ammonia, acting as a base, accepts a proton (H+) from the acid, hydrogen chloride. 

                                                NH\(_3\)(g) + HCl(g) → NH\(_4\)Cl(s) 

There is an explanation video available below.

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