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21) A compound whose molecular formula is C4H8O2 has following IR spectrum. Which of the following(s) is/are correct for the following spectrum ? I- The

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21) A compound whose molecular formula is C4H8O2 has following IR spectrum. Which of the following(s) is/are correct for the following spectrum ? I- The double bond equivalent is 1 . II- The molecule may contain C=O (carbonyl) group. III- The molecule should be ketone. IV- The molecule may contain OCH3 (methoxy) group A) I and III B) II and III C) I, II and IV D) II, III and IV E) Only

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