Q9 / 180 · KCET 2018 · Chemistry

When \( \mathrm{PbO}_{2} \) reacts with concentrated \( \mathrm{HNO}_{3} \), the gas evolved is

  • A
    \( \mathrm{NO}_{2} \)
  • Correct answer
    B
    \( O_{2} \)
  • C
    \( N_{2} \)
  • D
    \( N_{2} \mathrm{O} \)

Solution

\( 2 \mathrm{PbO}_{2}+4 \mathrm{HNO}_{3} \rightarrow 2 \mathrm{~Pb}\left(\mathrm{NO}_{3}\right)_{2}+2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2} \)

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

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