Question:
Dry distillation of calcium benzoate gives
Dry distillation of calcium benzoate gives
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The general reaction is: \((RCOO)_2Ca \xrightarrow{\Delta} R-CO-R + CaCO_3\). For calcium formate, it gives formaldehyde (HCHO).
Updated On: May 2, 2026
- benzaldehyde
- acetophenone
- benzoic acid
- benzophenone
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Dry distillation or heating of calcium salts of carboxylic acids yields ketones. This is a general method for ketone synthesis.
Step 2: Detailed Explanation:
Calcium benzoate is the calcium salt of benzoic acid \((C_6H_5COO)_2Ca\). Upon dry distillation, it undergoes decomposition to form a ketone. \[ (C_6H_5COO)_2Ca \xrightarrow{\Delta} (C_6H_5)_2CO + CaCO_3 \] The product is diphenylmethanone, commonly known as benzophenone.
Step 3: Final Answer:
Thus, the correct option is (D) benzophenone.
Dry distillation or heating of calcium salts of carboxylic acids yields ketones. This is a general method for ketone synthesis.
Step 2: Detailed Explanation:
Calcium benzoate is the calcium salt of benzoic acid \((C_6H_5COO)_2Ca\). Upon dry distillation, it undergoes decomposition to form a ketone. \[ (C_6H_5COO)_2Ca \xrightarrow{\Delta} (C_6H_5)_2CO + CaCO_3 \] The product is diphenylmethanone, commonly known as benzophenone.
Step 3: Final Answer:
Thus, the correct option is (D) benzophenone.
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