MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Organic ChemistryHydrocarbonsIsomerism & Preparation of Alkynes

Identify the compounds A and B in the following reaction sequence.

A.A is ethylene, B is acetaldehyde

B.A is acetylene, B is propionaldehyde

C.A is ethane, B is ethanl

D.A is acetylene, B is acetaldehyde✓ Correct

Explanation

Calcium carbide forms acetylene 2 2 2 2 2 CaC 2H O Ca H H ( ) O C -> Acetylene on hydration reaction with 4 2 4 / HgSO H SO gives oxymercuration reaction with acetaldehyde as product. 2 3 | 2 4 4 dil.H SO Tautomerism HC CH HC CH CH CHO HgSO OH -> -> Physical & Chemical Properties of Alkynes

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