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JEE CHEMISTRY MCQ: 14 TH GROUP ELEMENTS (P-BLOCK)

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Correct option: B
H3BO3β†’Ξ”HBO2\mathrm{H}_3 \mathrm{BO}_3 \stackrel{\Delta}{\rightarrow} \mathrm{HBO}_2
Option A (A={A}= Excess, B={B}= Excess) is incorrect. Option B (A={A}= Limited, B={B}= Excess) is correct because with limited Clβ‚‚, NH₃ is in excess, while with excess Clβ‚‚, NH₃ is limiting.

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