Compound of sulphur that has $-\mathrm{O}-\mathrm{O}-$linkage among the following is:

1. ${\mathrm{H}}_2{\mathrm{SO}}_4,$ $\mathrm{sulphuric}$ $\mathrm{acid}$

2. ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_8,$ $\mathrm{peroxodisulphuric}$ $\mathrm{acid}$

3. ${\mathrm{H}}_2{\mathrm{S}}_2{\mathrm{O}}_7,$ $\mathrm{pyrosulphuric}$ $\mathrm{acid}$

4. ${\mathrm{H}}_2{\mathrm{SO}}_3,$ $\mathrm{sulphurous}$ $\mathrm{acid}$

A compound 'X' upon reaction with $H_{2}O$ produces a colorless gas 'Y' with rotton fish smell. Gas 'Y' is absorbed in a solution of $CuS{O}_4$ to give $C{u}_3{P}_2$ as one of the products. Predict the compound 'X'

1. $C{a}_3{P}_2$

2. $N{H}_{4}Cl$

3. $A{s}_2{O}_3$

4. $C{a}_3{(PO}_{}$₄)2

Which one of the following reactions does not come under hydrolysis type reaction?

1. \(\mathrm{S i C l_{4 \left(\right. l \left.\right)} + 2 H_{2} O_{\left(\right. l \left.\right)} \rightarrow S i O_{2 \left(\right. s \left.\right)} + 4 H C l_{\left(\right. a q \left.\right)}}\)

2. \(\mathrm{L i_{3} N_{\left(\right. s \left.\right)} + 2 H_{2} O_{\left(\right. l \left.\right)} \rightarrow N H_{3 \left(\right. g \left.\right)} + 3 L i O H_{\left(\right. a q \left.\right)}}\)

3. \(\mathrm{2 F_{2 \left(\right. g \left.\right)} + 2 H_{2} O_{\left(\right. l \left.\right)} \rightarrow 4 H F_{\left(\right. a q \left.\right)} + O_{2 \left(\right. g \left.\right)}}\)

4. \(\mathrm{P_{4} O_{10 \left(\right. s \left.\right)} + 6 H_{2} O_{\left(\right. l \left.\right)} \rightarrow 4 H_{3} P O_{4 \left(\right. a q \left.\right)}}\)

Identify the correct formula of 'oleum' from the following

1. H₂S₂O₇

2. H₂SO₃

3. H₂SO₄

4. H₂S₂O₈

Among  the following oxoacids of phosphorus, the strongest reducing property is for:

1. H₄P₂O₇

2. H₃PO₃

3. H₃PO₂

4. H₃PO₄

A compound "X", upon reaction with H₂O, produces a colourless gas "Y" with a rotten fish smell.  Gas 'Y' is absorbed in a solution of CuSO₄ to give Cu₃P₂ as one of the products. The compound 'X' will be:

1. Ca₃P₂

2. ${\mathrm{NH}}_4\mathrm{Cl}$

3. ${\mathrm{As}}_2{\mathrm{O}}_3$

4. Ca₃(PO₄)₂

The given sequence among the following arrangements that is not strictly according to the property indicated against it.  

Match List-I (substances) with List-II (processes) employed in the manufacture of the substances and select the correct option.

 Wrong statement among the following is:

1. Bond energy of F₂ > Cl₂

2. Electronegativity of F > Cl

3. F is more oxidizing than Cl

4. Electron affinity of Cl > F

From the given options, the compound that has a planar structure is:
1. XeF₄
2. XeOF₂
3. XeO₂F₂
4. XeO₄