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Given below are two statements: Statement I: The N – N single bond is weaker and longer than that of P – P single bond. Statement II: Compounds of group 15 elements in +3 oxidation states readily undergo disproportionation reactions. In the light of the above statements, choose the correct answer from the options given below: (1) Statement I is false but Statement II is true (2) Statement I is true but Statement II is false (3) Both Statement I and Statement II are true (4) Both Statement I and Statement II are false

1. Statement I is false but Statement II is true
2. Statement I is true but Statement II is false
3. Both Statement I and Statement II are true
4. Both Statement I and Statement II are false

Correct answer: Both Statement I and Statement II are false

Solution

Statement I is false because the N-N bond is actually stronger and shorter than the P-P bond due to the smaller size and greater overlap of nitrogen's atomic orbitals. Statement II is also false as not all group 15 elements in the +3 oxidation state readily undergo disproportionation; this behavior is not universally applicable.

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