False statement regarding PCl₅ is:

1.	PCl5 molecule is non-reactive.
2.	Three equatorial P-Cl bonds make an angle of 120° with each other.
3.	Two axial  P-Cl bonds make an angle of 180° with each other.
4.	Axial P-Cl bonds are longer than equatorial P-Cl bonds.

The correct structure of tribromo octoxide is:

1.
2.
3.
4.

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

Match the Xenon compounds in Column I with their structure in Column II and assign the correct code:

Code:

The correct thermal stability order for  \(\mathrm{H}_2 \mathrm{E , E}=\mathrm{O}, \mathrm{S}, \mathrm{Se}, \mathrm{Te} \text { and } \mathrm{Po}\) 
among the following is:

1. \(\mathrm{H}_2 \mathrm{Se}<\mathrm{H}_2 \mathrm{Te}<\mathrm{H}_2 \mathrm{Po}<\mathrm{H}_2 \mathrm{O}<\mathrm{H}_2 \mathrm{~S}\)
2. \(\mathrm{H}_2 \mathrm{~S}<\mathrm{H}_2 \mathrm{O}<\mathrm{H}_2 \mathrm{Se}<\mathrm{H}_2 \mathrm{Te}<\mathrm{H}_2 \mathrm{Po}\)
3. \(\mathrm{H}_2 \mathrm{O}<\mathrm{H}_2 \mathrm{~S}<\mathrm{H}_2 \mathrm{Se}<\mathrm{H}_2 \mathrm{Te}<\mathrm{H}_2 \mathrm{PO}\)
4. \(\mathrm{H}_2 \mathrm{Po}<\mathrm{H}_2 \mathrm{Te}<\mathrm{H}_2 \mathrm{Se}<\mathrm{H}_2 \mathrm{~S}<\mathrm{H}_2 \mathrm{O}\)

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

1. H₄P₂O₇

2. H₃PO₃

3. H₃PO₂

4. H₃PO₄

Identify the correct formula of 'oleum' from the following

1. H₂S₂O₇

2. H₂SO₃

3. H₂SO₄

4. H₂S₂O₈

Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option.

Column I     Column II
A. XeF₆        1. Distorted octahedral
B. XeO₃       2. Square planar
C. XeOF₄     3. Pyramidal
D. XeF₄       4. Square pyramidal

Codes
A B C D
(a) 1 2 4 3
(b) 4 3 1 2
(c) 4 1 2 3
(d) 1 3 4 2

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