The $K_p$ value at equilibrium of $\mathrm{SO}_3$ formation reaction from $\mathrm{SO}_2(g)$ and $\mathrm{O}_2(g)$ is $5 \mathrm{~atm}^{-1}$. What is the equilibrium partial pressure of $\mathrm{O}_2$ if the equilibrium pressure of $\mathrm{SO}_2$ and $\mathrm{SO}_3$ are equal?
$$ \text { Match the following } $$
| $$ \text { Metal sulphide } $$ |
$$ \text { Solubility product } $$ |
||
|---|---|---|---|
| (A) | $$ \mathrm{PbS} $$ |
(I) | $$ 4.0 \times 10^{-53} $$ |
| (B) | $$ \mathrm{HgS} $$ |
(II) | $$ 8.0 \times 10^{-28} $$ |
| (C) | $$ \mathrm{MnS} $$ |
(III) | $$ 1.6 \times 10^{-24} $$ |
| (D) | $$ \mathrm{ZnS} $$ |
(IV) | $$ 2.5 \times 10^{-13} $$ |
$$ \text { The correct match is } $$
The correct statements among the following are
(A) $\mathrm{BeH}_2$ and $\mathrm{MgH}_2$ are polymeric in nature.
(B) LiH is unreactive to oxygen, at moderate temperatures.
(C) $\mathrm{BeH}_2$ and $\mathrm{MgH}_2$ possesses significant covalent character.
(D) The stability of alkali hydrides follows the order $\mathrm{LiH}<\mathrm{NaH}< \mathrm{KH}<\mathrm{RbH}<\mathrm{CsH}$.
The correct order of melting points of the following salts is
$$ \begin{array}{lll} \text { LiCl } & \text { LiF } & \text { Lil } \\ \text { I } & \text { II } & \text { III } \end{array} $$
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