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p-Block Elements (Group 15–18)

JEE Main 2025 (Online) 24th January Morning ShiftMCQEasy📈 Topic in 13% papers+4−1
Ques. 1JEE Main 2025, 24 January (Morning Shift)

The large difference between the melting and boiling points of oxygen and sulphur may be explained on the basis of

  1. Atomicity
  2. Electron gain enthalpy
  3. Atomic size
  4. Electronegativity

Answer

(1) Atomicity

Solution

O2: small diatomic molecule (atomicity 2), weak London forces gas.

S8: large crown-shaped molecule (atomicity 8), strong London forces solid.

the difference is due to atomicity.

Answer: (1)

Keep practising — p-Block Elements (Group 15–18)

Ques. 2JEE Main 2025, 23 January (Morning Shift)

The incorrect statement among the following is

  1. PH3 shows lower proton affinity than NH3.
  2. SO2 can act as an oxidizing agent, but not as a reducing agent.
  3. NO2 can dimerise easily.
  4. PF3 exists but NF5 does not.
Ques. 3JEE Main 2025, 22 January (Evening Shift)

The maximum covalency of a non-metallic group 15 element ' E ' with weakest E-E bond is :

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

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