Q30 / 100 · BITSAT 2024 (Memory Based Paper 1) · Chemistry

Dinitrogen is a robust compound, but reacts at high altitude to form oxides. The oxide of nitrogen that can damage plant leaves and retard photosynthesis is :

  • A
    NO
  • B
    $\mathrm{NO}_3{ }^{-}$
  • Correct answer
    C
    $\mathrm{NO}_2$
  • D
    $\mathrm{NO}_2{ }^{-}$

Solution

$\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{NO}(\mathrm{g})$ $2 \mathrm{NO}(\mathrm{g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{NO}_2(\mathrm{~g})$ Higher concentration of $\mathrm{NO}_2$ damage the leaves and retard the rate of photosynthesis.

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

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