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p -Block elements - ll — Chemistry STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
When copper is heated with conc. $HNO_3$ it produces
  • A
    $Cu(NO_3)_2, NO$ and $NO_2$
  • B
    $Cu(NO_3)_2$ and $N_2O$
  • ✓
    $Cu(NO_3)_2$ and $NO_2$
  • D
    $Cu(NO_3)_2$ and $NO$
✓

Answer

Correct option: C.
$Cu(NO_3)_2$ and $NO_2$
c
When copper react with conc. $HNO_3$ reddish brown gas $NO$, evolved

$\mathrm{Cu}+4 \mathrm{HNO}_{3} \longrightarrow \mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}+2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{NO}_{2}$

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