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

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
On heating ammonium dichromate, the gas evolved is
  • A
    $O_2$
  • ✓
    $N_2$
  • C
    $N_2O$
  • D
    $NH_3$
✓

Answer

Correct option: B.
$N_2$
b
$\left( NH _4\right)_2 Cr _2 O _7( s ) \rightarrow N _2( g )+4 H _2 O ( g )+ Cr _2 O _3( s )$

Ammonium dichromate decomposes on heating to produce nitrogen gas water vapour (gaseous due to the temperature of the reaction), and solid chromium($III$) oxide.

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