p-Block Elements (Group 15–18)

The correct structure of tribromooctaoxide is :

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Which is the correct thermal stability order for H2E (E = O, S, Se, Te and Po)?

1. H2Po < H2Te < H2Se < H2S < H2O
2. H2Se < H2Te < H2Po < H2O < H2S
3. H2S < H2O < H2Se < H2Te < H2Po
4. H2O < H2S < H2Se < H2Te < H2Po

Match the following : Which of the following is the correct option?

1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
2. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
3. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
4. (a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

Identify the incorrect statement related to PCl5 from the following :

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

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

1. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)
2. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
3. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
4. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

Which of the following statements is not true for halogens?

1. All are oxidizing agents.
2. All form monobasic oxyacids.
3. All but fluorine show positive oxidation states.
4. Chlorine has the highest electron-gain enthalpy.

Match the interhalogen compounds of column-I with the geometry in column-II and assign the correct code.

1. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
2. (a)-(v), (b)-(iv), (c)-(iii), (d)-(ii)
3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
4. (a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

In which pair of ions both the species contain S-S bond?

1. S4O62-, S2O32-
2. S2O72-, S2O82-
3. S4O62-, S2O72-
4. S2O72-, S2O32-

Name the gas that can readily decolourise acidified KMnO4 solution.

1. SO2
2. NO2
3. P2O5
4. CO2

HgCl2 and I2 both when dissolved in water containing I- ions, the pair of species formed is

1. HgI2, I-
2. HgI42-, I3-
3. Hg2I2, I-
4. HgI2, I3-