MCQ
Heating of ammonium dichromate produces
- A$NH_3 ,Cr_2O_3$ and $H_2O$
- ✓$N_2 ,Cr_2O_3$ and $H_2O$
- C$NO, CrO_3$ and $H_2O$
- D$Na_2O, CrO_3$ and $H_2O$
$\left( NH _4\right)_2 Cr _2 O _7 \rightarrow N _2+ Cr _2 O _3+4 H _2 O$
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$O(g) + e^- \to O^-(g); \Delta H = - 142 \,kJ \,mol^{-1}$
$O^-(g) + e \to O^{2-} (g); \Delta H = 844\, kJ \,mol^{-1}$
This is because
