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Given below are two statements: Statement (I) : The first ionisation enthalpy of group 14 elements is higher than the corresponding elements of group 13. Statement (II) : Melting points and boiling points of group 13 elements are in general much higher than those of corresponding elements of group 14. In the light of the above statements, choose the most appropriate Answer from the options given below:

1. Statement I and Statement II are incorrect
2. Statement I is incorrect but Statement II is correct
3. Statement I is correct but Statement II is incorrect
4. Both Statement I and Statement II are correct

Correct answer: Statement I is correct but Statement II is incorrect

Solution

The first ionisation enthalpy of group 14 elements is indeed higher than that of group 13 due to increased nuclear charge and effective shielding, making it harder to remove an electron. However, the melting and boiling points of group 14 elements are generally higher than those of group 13 due to stronger covalent bonding in group 14, making Statement II incorrect.

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