Q19 / 125 · BITSAT 2012 · Chemistry

$\mathrm{CO}_{2}$ goes to air, causes green house effect and gets dissolved in water. What will be the effect on soil fertility and $\mathrm{pH}$ of the water?

  • A
    Increases
  • Correct answer
    B
    Decreases
  • C
    Remain same
  • D
    None of these

Solution

$\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O} \rightleftharpoons \mathrm{H}_{2} \mathrm{CO}_{3} \rightarrow \mathrm{H}^{+}+\mathrm{HCO}_{3}^{-}$ Here $\left[\mathrm{H}^{+}\right]$ increases hence, $\mathrm{pH}$ decreases due to which soil fertility will also decreases.

Hence, the correct answer is option: 'B'.

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