Which reagent is used for formation of aldehyde from alcohol? 

This question was previously asked in
DSSSB PGT Chemistry (Female) Official Paper (Held On: 06 Jul, 2018 Shift 1)
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  1. LiAlH4
  2. \(\rm \frac{Zn}{HCl}\)
  3. \(\rm \frac{PCC}{CH2Cl_2}\)
  4. Red P

Answer (Detailed Solution Below)

Option 3 : \(\rm \frac{PCC}{CH2Cl_2}\)
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Detailed Solution

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CONCEPT:

Formation of Aldehyde from Alcohol

  • The conversion of alcohol to aldehyde is an oxidation process.
  • Primary alcohols are oxidized to aldehydes using mild oxidizing agents.
  • Strong oxidizing agents may further oxidize aldehydes to carboxylic acids, so a selective reagent is required for controlled oxidation.

EXPLANATION:

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  • Among the options, PCC in CH2Cl2 (dichloromethane) is the correct reagent for the formation of aldehyde from alcohol.

Therefore, the correct answer is Option 3: PCC/CH2Cl2.

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