A) Tollens reagent
B) Fehlings solution
C) Schiffs reagent
D) All of the above
Correct Answer: D
Solution :
Key Idea; The group to be detected by a reagent must give specific charge in colour or ppt. to show its presence. Aldehyde + Tollens reagent \[\to \] Silver mirror formed Aldehyde + Fehlings solution \[\to \] Red ppt. of \[C{{u}_{2}}O\]is formed Aldehyde + Schiffs reagent \[\to \] Pink colouration So, all the above reactions are used to detect presence of aldehyde group.
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