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JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

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Which of the following is not a monobasic acid?
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Correct option: C
H2Β S2O3\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_3
Option C (H2Β S2O3\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_3) is not a monobasic acid because it has two ionizable hydrogen atoms, making it a dibasic acid.

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