Question

Which of the following method/(s) will give acetic anhydride?

• A. Anhydrous acetic acid is dehydrated in presence of $P_2{O}_5$
• B. Anhydrous acetic acid is dehydrated in presence of anhydrous $ZnC{l}_2$
• C. Both of the above
• D. None of the above

Answer 1

The correct option is C Both of the above

Anhydrous acetic acid is dehydrated in presence of dehydrating agent such as $P_2{O}_5$ or ahydrous $ZnC{l}_2$ to obtain acetic anhydride.
$2C{H}_{3}COOH\underset{P_2{O}_5}{\overset{heat}{\to }}(C{H}_{3}CO{)}_{2}O$