Q2 / 180 · KCET 2022 · Chemistry

In which of the following compounds, an element exhibits two different oxidation states?

  • Correct answer
    A
    $\mathrm{NH}_4 \mathrm{NO}_3$
  • B
    $\mathrm{N}_2 \mathrm{H}_4$
  • C
    $\mathrm{N}_3 \mathrm{H}$
  • D
    $\mathrm{NH}_2 \mathrm{CONH}_2$

Solution

In $\mathrm{NH}_4 \mathrm{NO}_3, \mathrm{~N}$ exhibits two different oxidation states. Actually $\mathrm{NH}_4 \mathrm{NO}_3$ exists as $\mathrm{NH}_4^{+}$ and $\mathrm{NO}_3^{-}$. Oxidation state of $\mathrm{N} \mathrm{in}_4^{+}$is -3 and in $\mathrm{NO}_3^{-}$is +5 .

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

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