Which of the following compounds is a soap?

C H_{3} (C H_{2})_{16} C O N a

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C H_{3} (C H_{2})_{16} C O O N a

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C H_{3} (C H_{2})_{16} C O O H

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C H_{3} (C H_{2})_{16} C O O C H_{3}

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Solution

The correct option is B $C H_{3} (C H_{2})_{16} C O O N a$
$C H_{3} (C H_{2})_{16} C O O N a$ is a soap as soaps are the sodium salts of carboxylic acids and thus will have $- C O O N a$ in their structures.

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