Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Aldehyde and ketone can be distinguished by: (1) Tollen's reagent (2) Fehling's reagent (3) 2,4-DNP (4) \[NaHC{{O}_{3}}\]A) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: B
Solution :
Aldehyde gives positive test with Tollen's reagent and Fehling's reagent while ketone's do not give these test. \[RCHO+\underset{\begin{smallmatrix} Tollen'\text{ }s \\ reagent \end{smallmatrix}}{\mathop{A{{g}_{2}}O}}\,\xrightarrow[{}]{{}}RCOOH+\underset{silver\text{ }mirror}{\mathop{2Ag}}\,\] \[RCHO+\underset{\begin{smallmatrix} Fehling's \\ reagent \end{smallmatrix}}{\mathop{2CuO}}\,\xrightarrow[{}]{\Delta }RCOOH+\underset{\begin{smallmatrix} red\text{ }ppt. \\ cuprous\text{ }oxide \end{smallmatrix}}{\mathop{C{{u}_{2}}O}}\,\]
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