Which of the following catalysts is used for the preparation of acidic anhydrides?
Correct answer: B. P2O5
- A. K2Cr2O7
- B. P2O5
- C. H+/H2O
- D. H2SO4
Explanation
Phosphorous pentoxide is used to condense carboxylic acids to acid anhydrides.
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About Carboxylic Acids
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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