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NEET levelSingle correct optionDifficulty 1 of 3nm088

The IUPAC name of $(CH X_{3} CO) X_{2} O$ is:

Aethanoic anhydride
Bethyl ethanoate
Cpropanoic anhydride
Dethanoic methanoic anhydride

Answer: A

A symmetrical anhydride is named by replacing the word acid of the parent acid by anhydride. The parent acid is ethanoic acid, so

(CH X_{3} CO) X_{2} O

is ethanoic anhydride (acetic anhydride).

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