MCQ
Select correct about the following change
$NO_2^+ \to NO_2 \to NO_2^-$
- AIncrease of $N-O$ bond order
- ✓Decrease of $O-N-O$ bond angle
- CDecrease of $N-O$ bond length
- DAll of the above
$NO_2^+ \to NO_2 \to NO_2^-$
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$A \rightarrow B; \ \ \ K_1 = 10^{15}\ exp.\ \left( {\frac{{ - 2000}}{T}} \right)$
$C \rightarrow D;\ \ \ K_2 = 10^{14}\ exp. \ \left( {\frac{{ - 1000}}{T}} \right)$
The temperature at which $K_1 = K_2$ is ........... $K$ ($exp. = e$)

$M{g^{2 + }} + 2{e^ - } \to Mg(s);\,\,E = - 2.37\,V$
$C{u^{2 + }} + 2{e^ - } \to Cu(s);\,\,\,E = + 0.33\,V$