Question 38

Given below are two statements:
Statement I: Boron is extremely hard indicating its high lattice energy.
Statement II: Boron has highest melting and boiling point compared to its other group members.
In the light of the above statements, choose the most appropriate answer from the options given below

Solution

Statement I: Boron is extremely hard indicating high lattice energy — Incorrect. Boron's hardness is due to its covalent network structure, not ionic lattice energy. The term "lattice energy" applies to ionic compounds.

Statement II: Boron has the highest melting and boiling point among Group 13 elements — Correct. Boron (MP ≈ 2076°C) has the highest values due to its strong covalent network structure.

Statement I is incorrect but Statement II is correct.

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Given below are two statements:Statement I: Boron is extremely hard indicating its high lattice energy.Statement II: Boron has highest melting and boiling point compared to its other group members.In the light of the above statements, choose the most appropriate answer from the options given below

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