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. I

Question

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

(A) Both Statement I and Statement II are incorrect
(B) Statement I is correct but Statement II is incorrect
(C) Statement I is incorrect but Statement II is correct
(D) Both statement I and Statement II are correct | JEE(Main) 2023 | DATE : 12-04-2023 (SHIFT-1) | PAPER-1 | OFFICIAL | CHEMISTRY PAGE # 5

Prashant Kotian · Accepted Answer

Correct answer: D. Boron is non-metallic in nature. It is extremely hard and black coloured solid. Due to very strong crystalline lattice, boron has unusually high melting point. Rest of the member are soft metals with low melting point and high electrical conductivity. Melting point / K (B > Al > Ga < In < Tl) 933 430 Boiling point / K (B > Al > Ga > In > Tl) 2740 2353

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