An organic compound A having molecular formula C₆H₆O gives a violet colour with neutral FeCl₃ ​ solution. A on treatment with CO₂​ and NaOH at 400 K under pressure gives B which on acidification gives a compound C. The compound C reacts with acetyl chloride to give D which is popular pain killer. Deduce the structure of A, B, C and D.

What are the colours given by primary, secondary and tertiary alcohols respectively in Victor-Meyer's test?

Red, Blue, Colourless

The correct answer is option 2. Red, Blue, Colourless.

In Victor Meyer’s method, alcohol is first treated with \(P\) and \(I_2\) to get iodoalkane , which is then treated with \(AgNO_2\) (silver nitrate) to get nitroalkane. The nitroalkane thus obtained is treated with nitrous acid (a mixture of \(NaNO_2\) and dil. \(HCl\)) and the resulting solution is finally made alkaline with \(KOH\) and the colour is observed. If the colour obtained is:

Red Colour = Primary alcohol

Blue Colour = Secondary alcohol

No colour = Tertiary alcohol.