Question

question 13 (10 points) which compound will give a positive result in a tollens test? more than one of the compounds will give a positive tollens test result.

Explanation:

Tollens' test is used to detect aldehydes. Aldehydes are oxidized by Tollens' reagent (ammoniacal silver nitrate) to carboxylic acids, and silver ions are reduced to metallic silver (producing a silver - mirror). The first compound is an ester ($\ce{CH3 - C(O)-O - CH2 - CH3}$), the second is a ketone (cyclohexanone), the third is an aldehyde (benzaldehyde), and the fourth is an alkene with an ethyl - substituent. Only aldehydes give a positive Tollens' test.

Answer:

The third compound (the benzaldehyde derivative)