Question

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 the corresponding elements of group 14. Choose the most appropriate answer from the options given below:

• A. Statement I is correct but Statement II is incorrect
• B. Statement I is incorrect but Statement II is correct
• C. Both Statement I and Statement II are incorrect
• D. Both Statement I and Statement II are correct

Hint:

Ionisation enthalpy increases across a period as the nuclear charge increases, but the melting and boiling points of the elements generally follow the trends in atomic size and bonding strength.

Answer 1

The Correct Option is A

Statement I:
The first ionisation enthalpy of group 14 elements is indeed higher than that of group 13 elements, as the number of valence electrons increases from group 13 to 14, leading to a higher ionisation energy. 
Thus, Statement I is correct
Statement II: This statement is incorrect. 
The melting points and boiling points of group 13 elements are generally lower than those of group 14 elements due to the stronger metallic bonding in group 14 elements. 
Thus, Statement II is incorrect. 
Therefore, the correct answer is (1).