Question

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): Melting point of Boron (2453 K) is unusually high in group 13 elements.
Reason (R): Solid Boron has a very strong crystalline lattice.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
• B. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• C. (A) is true but (R) is false
• D. (A) is false but (R) is true

Answer 1

Answer: (B)

Both (A) and (R) are correct and (R) is the correct explanation of (A)

Answer 2

Both Assertion (A) and Reason (R) are correct, and (R) explains (A). Boron has a strong crystalline structure due to covalent bonding and a unique lattice arrangement, which leads to its unusually high melting point within group 13 elements.