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. $SiC{l}_{4\left(l\right)}+2H_2{O}_{\left(l\right)}\to Si{O}_{2\left(s\right)}+4HC{l}_{\left(aq\right)}$

2. $L{i}_3{N}_{\left(s\right)}+2H_2{O}_{\left(l\right)}\to N{H}_{3\left(g\right)}+3LiO{H}_{\left(aq\right)}$

3. $2F_{2\left(g\right)}+2H_2{O}_{\left(l\right)}\to 4H{F}_{\left(aq\right)}+O_{2\left(g\right)}$

4. $P_4{O}_{10\left(s\right)}+6H_2{O}_{\left(l\right)}\to 4H_{3}P{O}_{4\left(aq\right)}$

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

Choose the incorrect statement among the following regarding noble gases:

In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?

False statement regarding PCl₅ is:

Match the name of process given in column I with the name of compound given in
column II and mark the correct option.