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NEET UG CHEMISTRY MCQ: 13 TH GROUP ELEMENTS (P-BLOCK)
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Assertion: Boron is a nonmetal, whereas the other group of 13 elements are metals.
Reason: Boron has a smaller atomic radius than the other group of 13 elements.
Reason: Boron has a smaller atomic radius than the other group of 13 elements.
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Correct option: A
Both Assertion and Reason are true and Reason is the correct explanation for Assertion
Option A (Both Assertion and Reason are true and Reason is the correct explanation for Assertion) is correct because boron's smaller size leads to higher electronegativity and nonmetallic character compared to other group 13 elements.
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