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Q.
Which of the following is incorrect : -
AIPMTAIPMT 2001Aldehydes Ketones and Carboxylic Acids
Solution:
Tollen's reagent is ammoniacal silver nitrate solution and it is used for detection of aldehyde group not for unsaturation. Aldehydes reduces Tollen's reagent to give adds and silver powder is obtained which forms silver coloured mirror in the test tube.
$ R - CHO + [Ag (NH_3)_2 ]^{+} \rightarrow RCOO^{-} + \underset{\text{ Powder}}{ Ag }$