Question

Above compounds can be differentiated by using the reagent:

• A. $NaOH$, Tollen's reagent, $FeC{l}_3$
• B. $Cr{O}_3$, Tollen's reagent, $FeC{l}_3$
• C. Tollen's reagent, $Cr{O}_3$, $FeC{l}_3$
• D. $Na$, Tollen's reagent, $FeC{l}_3$

Answer 1

Answer: (B)

$Cr{O}_3$, Tollen's reagent, $FeC{l}_3$

The given compounds can be differentiated by using $Cr{O}_3$, Tollen's Reagent, $FeC{l}_3$

As only aldehyde can give Tollen's test, alcohol, ester do not give. Thus first we need to oxidise the group.

(Refer to Image)

$p-ethyl$ $benzaldehyde$