Dung dịch X chứa 0,01 mol H₂N-CH₂COOCH₃; 0,02 mol ClH₃N-CH₂COONa và 0,03 mol HCOOC₆H₄OH. Để tác dụng hết với dung dịch X cần tối đa V ml dung dịch NaOH 0,5M đun nóng thu được dung dịch Y. Giá trị của V là:             

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• Mark the letter A, B, C or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions:   

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