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7. Redox reactions — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry7. Redox reactions1 Mark
MCQ
If $HN{O_3}$ changes into ${N_2}O$, the oxidation number is changed by
  • A
    $+2$
  • B
    $-1$
  • C
    $0$
  • ✓
    $+4$
✓

Answer

Correct option: D.
$+4$
(d) $HN{O_3}$      $ \rightleftharpoons $      $\mathop {{N_2}O}\limits^{ * \,\,\,\,\,\,} $
     $1 + x - 6 = 0$          $2x - 2 = 0$
     $x = + 5$                  $2x = 2$
                                      $x = \frac{2}{2} = + 1$

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