Chemistry - ALCOHOL & ETHER Question with Solution | TestHub
Match the following
List - I | List - II |
|---|---|
(P) | (1) PCC (Pyridiumchloro chromate) |
(Q)
| (2) Cu/573K |
(R)
| (3) K2Cr2O7 + Dil H2SO4 /293K |
(S)
| (4)
|
| (5) |
Options:
Answer:
Solution:
Question Explanation:
Match primary, secondary, and tertiary alcohols with reagents for oxidation or dehydration products. Concept:
This question is based on oxidation and dehydration of alcohols.
Solution:
PCC (Pyridinium chlorochromate) is a mild oxidising agent.
It oxidises 1° alcohols → aldehydes and 2° alcohols → ketones, without further oxidation.
KMnO4 /H+ and K2Cr2O7 /H+ are strong oxidising agents.
They oxidise 1° alcohols → carboxylic acids and 2° alcohols → ketones.
On heating with Cu at 573 K:
1° alcohols → aldehydes,
2° alcohols → ketones,
3° alcohols → alkenes (via dehydration).
H3PO4 acts as a dehydrating agent and converts alcohols → alkenes by elimination of water.