Chemistry-(general)
NEET Chemistry (general) Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 11
Assertion (A): Boron can form only BF₄⁻, whereas aluminium can form AlF₆³⁻. | Reason (R): The first member of each p-block group has a limited number of valence orbitals, restricting its maximum covalency.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
The first member of each p-block group, like boron, has limited valence orbitals (3s, 3p, 3d), allowing only a maximum covalency of 4, unlike heavier elements like aluminium that can expand their valence shell.
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