Question

Statement - I: N-N bond is weaker and longer than P-P bond. Statement - II: Member of group 15 in +3 oxidation state can easily under disproportionation reaction.

• A. Both statement I and statement II are true.
• B. statement I is true and statement II is false.
• C. statement I is false and statement II is true.
• D. Both statement I and statement II are false.

Answer 1

Answer: (C)

statement I is false and statement II is true.

Answer 2

1. Statement I: The claim “N–N bond is weaker and longer than P–P bond” is incorrect. Due to the small size and high electron density of nitrogen atoms (leading to strong 2p–2p repulsions), the N–N single bond is actually shorter but weaker compared to the P–P bond. So, Statement I is false.

2. Statement II: In Group 15, the elements in the +3 oxidation state (especially for the heavier elements due to the inert pair effect) are prone to undergo disproportionation reactions. This makes Statement II true.

Thus, Statement I is false and Statement II is true.