JAMB - Chemistry (2005 - No. 37)
A dense white fume is formed when ammonia gas reacts with
O2(g)
H2(g)
Cl2(g)
HCl(g)
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)
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