p-Block Elements (Group 15–18)

How many bridging oxygen atoms are present in P4O10?

1. 6
2. 4
3. 2
4. 5

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

1. (A) (i); (B) (iv); (C) (ii); (D) (iii)
2. (A) (i); (B) (ii); (C) (iii); (D) (iv)
3. (A) (iv); (B) (iii); (C) (ii); (D) (i)
4. (A) (iv); (B) (ii); (C) (iii); (D) (i)

Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively

1. +3, +5, +4
2. +5, +3, +4
3. +5, +4, +3
4. +3, +4, +5

Among the following which is the strongest oxidising agent?

1. Br2
2. I2
3. Cl2
4. F2

Which of the following arrangements do not give the correct picture of the trends indicated against them?

1. F2 > Cl2 > Br2 > I2 : Bond dissociation energy
2. F2 > Cl2 > Br2 > I2 : Electronegativity
3. F2 > Cl2 > Br2 > I2 : Oxidizing power
4. F2 > Cl2 > Br2 > I2 : Electron gain enthalpy

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

1. HOClO < HOCl < HOClO3 < HOClO2
2. HOClO2 < HOClO3 < HOClO < HOCl
3. HOClO3 < HOClO2 < HOClO < HOCl
4. HOCl < HOClO < HOClO2 < HOClO3

Which one of the following orders is not in accordance with the property stated against it ?

1. F2 > Cl2 > Br2 > I2 : Bond dissociation energy
2. F2 > Cl2 > Br2 > I2 : Oxidising power
3. HI > HBr > HCl > HF : Acidic property in water
4. F2 > Cl2 > Br2 > I2 : Electronegativity

Which one of the following orders is not in accordance with the property stated against it?

1. F2 > Cl2 > Br2 > I2 : Bond dissociation energy
2. F2 > Cl2 > Br2 > I2 : Oxidising power
3. HI > HBr > HCl > HF : Acidic property in water
4. F2 > Cl2 > Br2 > I2 : Electronegativity.

Which one of the following oxides is expected to exhibit paramagnetic behaviour?

1. CO2
2. SiO2
3. SO2
4. ClO2

What is the correct relationship between the pH of isomolar solutions of sodium oxide, Na2O (pH1), sodium sulphide, Na2S (pH2), sodium selenide, Na2Se (pH3) and sodium telluride Na2Te (pH4)?

1. pH1 > pH2 > pH3 > pH4
2. pH1 > pH2 pH3 > pH4
3. pH1 < pH2 < pH3 < pH4
4. pH1 < pH2 < pH3 pH4