Catalysts in the following reactions are
(I) $\mathrm{CH}_3 \mathrm{COOCH}_3(l)+\mathrm{H}_2 \mathrm{O}(l)\longrightarrow \mathrm{CH}_3 \mathrm{COOH}(a q)+\mathrm{CH}_3 \mathrm{OH}(l)$
(II) $2 \mathrm{SO}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{SO}_3(\mathrm{~g})$
(III) $2 \mathrm{SO}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{SO}_3(\mathrm{~g})$
(IV) $\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \longrightarrow 2 \mathrm{NH}_3(\mathrm{~g})$
The total number of paramagnetic gaseous products formed in all the following reactions $[A+B+C]$ are
(A) $\mathrm{NH}_4 \mathrm{NO}_3 \xrightarrow{\Delta}$ Products
(B) $\mathrm{NaNO}_2+\mathrm{H}_2 \mathrm{SO}_4 \longrightarrow$ Products
(C) $\mathrm{Pb}\left(\mathrm{NO}_3\right)_2 \xrightarrow{673 \mathrm{~K}}$ Products
The main products $P$ and $Q$ of the following unbalanced disproportionation reaction $\mathrm{Se}_2 \mathrm{Cl}_2 \longrightarrow P+Q$ are
The correct order of acidity of $\mathrm{HClO}, \mathrm{HBrO}$ and HIO is
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