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JEE Main levelSingle correct optionDifficulty 2 of 3co144

Which of the following gives a negative result with Fehling solution when warmed?

A $CH X_{3} CHO$
B $C X_{6} H X_{5} CHO$
C $CH X_{3} CH X_{2} CHO$
D $HCHO$

Answer: B

Fehling solution (alkaline

Cu X^{2 +}

tartrate) is a weak oxidant that oxidises aliphatic aldehydes but not aromatic aldehydes. Benzaldehyde does not respond.

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