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JEE Main 2007
Exam
JEE Main
Year
2007
Subject
Chemistry
Chapter
Ionic Equilibrium

JEE Main 2007 · Chemistry · Ionic Equilibrium

Regular use of which of the following fertilizer increases the...

Regular use of which of the following fertilizer increases the acidity of soil?

Options

  1. APotassium nitrate
  2. BUrea
  3. CSuperphosphate of lime
  4. DAmmonium sulphate

Correct answer

D. Ammonium sulphate

Step-by-step solution

(NH4)2SO4\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 is a salt of strong acid and weak base, on hydrolysis it ill produce H+\mathrm{H}^{+}ion. This will increase the acidity of soil. (NH4)2SO4⟶2NH4++SO42−NH4++H2O⇌NH4OH+H+\begin{aligned} & \left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4 \longrightarrow 2 \mathrm{NH}_4^{+}+\mathrm{SO}_4^{2-} \\ & \mathrm{NH}_4^{+}+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{NH}_4 \mathrm{OH}+\mathrm{H}^{+} \end{aligned} Hence, (D) is correct answer.
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