MCQ
The conversion of $Pb{O_2}$ to $Pb{(N{O_3})_2}$is
- AOxidation
- ✓Reduction
- CNeither oxidation nor reduction
- DBoth oxidation and reduction
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$aCr _2 O _7^{2-}+ bSO _3^{2-}( aq )+ cH ^{+}( aq ) \rightarrow 2 aCr ^{3+}( aq )+ bSO _4^{2-}( aq )+\frac{ c }{2} H _2 O ( l )$
the coefficients a, b and $c$ are found to be, respectively-
Given : $K_f (H_2O)$ = $2\ K\ kg\ mole^{-1}$, $K_{sp} (PbCl_2)$ = $4 × 10^{-6}$
(Assume molarity to be equal to molality) .....$^oC$
$N{H_3}(g) \rightleftharpoons \frac{1}{2}{N_2}\left( g \right) + \frac{3}{2}{H_2}(g);{K_p}$
The degree of dissociation $(\alpha )$ of $NH_3$ is related to total equilibrium pressure $(P^o)$ as
| Rate Constant | Activation energy | |
| Step $1$ | $k_1$ | $E_{a_1} = 180\ kJ/mol$ |
| Step $2$ | $k_2$ | $E_{a_2} = 80\ kJ/mol$ |
| Step $3$ | $k_3$ |
$E_{a_3} = 50\ kJ/mol$ |