JEE Main Chemistry question

Boron differs from the other members of group 13 because it:

(A)Has much lesser (smaller) radiusCorrect
(B)Is a non-metal
(C)Is covalent in its compounds
(D)Has a maximum covalency of 4 (as in )

Answer: (A)

Solution

Boron's exceptionally small atomic/ionic size compared with the rest of Group 13 is the root cause of its anomalous behaviour: it leads to very high ionisation energy and charge density, giving boron essentially non-metallic, covalent chemistry, the absence of a

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Question ID VK-138630