Question:
Which among the following compounds forms pink colouration on addition of Schiff's reagent?
Which among the following compounds forms pink colouration on addition of Schiff's reagent?
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Schiff's reagent gives a pink or magenta colour only with aldehydes.
Updated On: Nov 13, 2026
- Propanol
- Propanone
- Propanal
- Propanoic acid
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Schiff's reagent is a test for the aldehyde group, which restores the pink colour of decolourised fuchsin.
Step 2: Identify the Functional Groups
Propanol is an alcohol, propanone is a ketone, propanal is an aldehyde and propanoic acid is a carboxylic acid.
Step 3: Compare the options
Only propanal \( \text{CH}_3\text{CH}_2\text{CHO} \) is an aldehyde, so it gives the pink colour: option (C).
Final Answer:
Propanal gives the pink colour with Schiff's reagent. \[ \boxed{\text{(C) }\text{Propanal}} \]
Schiff's reagent is a test for the aldehyde group, which restores the pink colour of decolourised fuchsin.
Step 2: Identify the Functional Groups
Propanol is an alcohol, propanone is a ketone, propanal is an aldehyde and propanoic acid is a carboxylic acid.
Step 3: Compare the options
Only propanal \( \text{CH}_3\text{CH}_2\text{CHO} \) is an aldehyde, so it gives the pink colour: option (C).
Final Answer:
Propanal gives the pink colour with Schiff's reagent. \[ \boxed{\text{(C) }\text{Propanal}} \]
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