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1. (X) = Phosphorous acid , (Y) = Metaphosphoric acid
2. (X) = Pyrophosphoric acid , (Y) = Metaphosphoric acid
3. (X) = Metaphosphoric acid , (Y) = Pyrophosphoric acid
4. (X) = Metaphosphoric acid , (Y) = Phosphene gas

Ammonia can be dried by
1. Conc.${\mathrm{H}}_2{\mathrm{SO}}_4$
2. ${\mathrm{P}}_4{\mathrm{O}}_{10}$
3. CaO
4. anhydrous ${\mathrm{CaCI}}_2$

When ${\mathrm{I}}^{-}$ is oxidised by ${\mathrm{MnO}}_4^{-}$ in alkaline medium, ${\mathrm{I}}^{-}$ converts into ${}^{-}$
1. ${\mathrm{IO}}_3^{-}$
2. ${\mathrm{l}}_2$
3. ${\mathrm{IO}}_4^{-}$
4. ${\mathrm{lO}}^{-}$

Hydrogen peroxide can be generated by the hydrolysis of
1. ${\mathrm{HNO}}_3$
2. ${\mathrm{H}}_2{\mathrm{P}}_2\mathrm{O}$
3. ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_8$
4. ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_6$

$C{l}_{2}O$ is an anhydride of:
(1) $HCl{O}_4$
(2) HOCl
(3) $C{l}_2{O}_3$
(4) $HCl{O}_2$

Which of the following statement is false?

One gas bleaches the coloured matter by reduction temporary while the other one by oxidation
permanently. The gases are respectively:
(1) $S{O}_2 and C{l}_2$                             
(2) $O_3 and C{l}_2$
(3) $H_{2}S and C{O}_2$                             
(4) $C{l}_2 and S{O}_2$

Which of the following pair has bleaching property?
1. ${\mathrm{O}}_3 \mathrm{and} {\mathrm{NO}}_2$
2. ${\mathrm{O}}_2 \mathrm{and} {\mathrm{H}}_2\mathrm{S}$
3. ${\mathrm{SO}}_2 \mathrm{and} {\mathrm{CI}}_2$
4. ${\mathrm{CI}}_2 \mathrm{and} {\mathrm{NO}}_2$

Which does not give ammonia with water?
1. $M{g}_3{N}_2$
2. AlN
3. $CaC{N}_2$
4. $Ca{\left(CN\right)}_2$

Under ambient conditions, the total number of gases released as products in the final step of the reaction scheme shown below is/are:
$XeF_{6} \ \xrightarrow[]{\textbf{Complete hydrolysis}} \ P \ + \ other \ product$
$P \ \xrightarrow[]{OH^{-} / H_{2}O} \ Q \ \xrightarrow[]{\textbf{slow disproportionation in}\ OH^{-}/H_{2}O} \ Product$
1. 0
2. 1
3. 2
4. 3