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Question

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Chemistry diagram for: See image

Answer: C

💡 Solution & Explanation

Atomic radius Ga (135 pm), Al (143 pm). Oxidation state of Thallium in 3 T I is +1 Boron does not form 3 6 BF  ion due to non-availability of d-orbitals. 3 3 H BO is a monobasic acid.

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