The false statement regarding hydrides from the 15th group is:

1.	NH3 > PH3 > AsH3 > SbH3 > BiH3	Thermal stability
2.	N-H > P-H > As-H > Sb-H > Bi-H	E-H bond dissociation enthalpy
3.	NH3 > PH3 > AsH3 > SbH3 > BiH3	Reducing character
4.	NH3 > PH3 > AsH3 > SbH3 > BiH3	Basicity

Which of the following statements is false? 

The species among the following that does not exist is-

1. ${\left(\mathrm{Sn}{F}_6\right)}^{2-}$

2. ${\left({\mathrm{GeCl}}_6\right)}^{2-}$

3. ${\left({\mathrm{CCl}}_6\right)}^{2-}$

4. ${\left({\mathrm{SiF}}_6\right)}^{2-}$

Which of the following reactions does not exhibit the oxidising behaviour of H₂SO₄?

1. Cu + 2H₂SO₄ → CuSO₄ + SO₂ + 2H₂O

2. 3S + 2H₂SO₄ → 3SO₂ + 2H₂O

3. C + 2H₂SO₄ → CO₂ + 2SO₂ + 2H₂O

4. CaF₂ + H₂SO₄ → CaSO₄ + 2HF

Match the compounds given in Column-I with the  shape given in Column-II and mark the correct option. 

The strong reducing behaviour of H₃PO₂ is due to:

1. Presence of one -OH group and two P-H bonds.

2. High electron gain enthalpy of phosphorus.

3. High oxidation state of phosphorus.

4. Presence of two -OH groups and one P-H bond.

The basic structural unit of silicates is:

1. (SiO₄)^4–

2. (SiO₃)^2–

3. (SiO₄)^2–

4. (SiO)

False statement regarding PCl₅ is:

The correct structure of tribromo octoxide is:

1.
2.
3.
4.