Question

Following are the identification tests of alcohols: (A) $1^{\circ}$ alcohol gives red, (B) $2^{\circ}$ alcohol gives blue, (C) $3^{\circ}$ alcohol gives green, (D) $1^{\circ}$ alcohol gives yellow in Victor Meyer Test.}

• A. A, B and C only
• B. A, B and D only
• C. A, C and D only
• D. A and B only

Hint:

Victor Meyer Mnemonic: RBC (Red, Blue, Colorless) for $1^{\circ}, 2^{\circ}, 3^{\circ}$.

Answer 1

The Correct Option is D

Step 1: Concept The Victor Meyer Test is used to distinguish between primary, secondary, and tertiary alcohols.

Step 2: Meaning The test involves conversion to iodide, then nitroalkane, followed by reaction with nitrous acid and alkali.

Step 3: Analysis $1^{\circ}$ alcohols form nitrolic acids which turn red with NaOH. $2^{\circ}$ alcohols form pseudonitroles which turn blue with NaOH. $3^{\circ}$ alcohols do not react with nitrous acid and remain colorless.

Step 4: Conclusion Statements A and B accurately describe the color results. C and D are incorrect. Final Answer: (D)