JEE MAIN - Chemistry (2007 - No. 22)
Regular use of which of the following fertilizer increases the acidity of soil?
Potassium nitrate
Urea
Superphosphate of lime
Ammonium sulphate
Explication
$$\,{\left( {N{H_4}} \right)_2}S{O_4} + 2{H_2}O\buildrel \, \over
\longrightarrow 2{H_2}S{O_4} + N{H_4}OH$$
$${H_2}S{O_4}\,\,$$ is strong acid and increases the acidity of soil.
$${H_2}S{O_4}\,\,$$ is strong acid and increases the acidity of soil.