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Given below are two statements : Statement I : The halogen that makes longest bond with hydrogen in HX, has the smallest covalent radius in its group. Statement II : A group 15 elements hydride EH3 has the lowest boiling point among corresponding hydrides of other group 15 elements. The maximum covalency of that element E is 4. In the light of the above statements, choose the correct answer from the options given below.

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

Correct answer: Both Statement I and Statement II are false.

Solution

Statement I is incorrect because the halogen with the longest bond to hydrogen is typically the one with the largest atomic radius, not the smallest. Statement II is also false as the hydride of nitrogen (NH3) has a higher boiling point than those of other group 15 elements, and the maximum covalency of nitrogen is 4, but this does not apply to all group 15 elements.

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