Consider the following reactions: {({C7H14})}{{'A'}} {{ozonolysis}} {'B'} + {'C'}
Hydrocarbons · Class 11 · JEE Main Previous Year Question
Consider the following reactions:
- a
- b
- c
- d✓
A has molecular formula (MW = 98), which means DoU = 1 (one double bond). Ozonolysis gives B + C. The tests applied to B and C are:
- B gives iodoform test (positive) → B contains group (methyl ketone or acetaldehyde)
- C gives silver mirror test (positive) → C is an aldehyde
Step 2: Identify B and C From the reactions shown:
- B gives iodoform → B is a methyl ketone:
- C gives silver mirror → C is an aldehyde:
For with 1 double bond:
B + C must together have 7 carbons.
This is 3-methylhex-3-ene → molecular formula ✓
Answer: Option (d)
Key Points to Remember:
- Iodoform test: detects group (methyl ketones + ethanal)
- Silver mirror test: detects aldehydes ()
- Reconstruct alkene by replacing of both fragments with
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