MCQ
When $AgNO_3$ is heated strongly, the products formed are
- A$NO$ and $NO_2$
- ✓$NO_2$ and $O_2$
- C$NO_2$ and $N_2O$
- D$NO$ and $O_2$
The reaction is as follows:
$2 AgNO _3( l ) \stackrel{\Delta}{\longrightarrow} 2 Ag ( s )+ O _2( g )+2 NO _2( g )$
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$4M + 8CN^-+ 2H_2O + O_2 \rightarrow 4[M(CN)_2]^-+ 4OH^-$
$2[M(CN)_2]^-+ Zn \rightarrow [Zn(CN)_4]^{2-} + 2M$
$O(g) + e^- = O^-(g)$ $\Delta {H_{eg}} = - 142\,kJ\,mo{l^{ - 1}}$
$O^-(g) + e^- = O^{2-}(g)$ $\Delta {H_{eg}} = +844\,kJ\,mo{l^{ - 1}}$
This is because