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Solution


Q.

The major product of the following reaction is :             [2025]

CH3CH2CH=O→refluxexcess HСНО alkali
1  
2  
3  
4 CH3-CH2-CH2-OH  

Ans.

(3)

2 mol of HCHO undergo cross aldol condensation with 1 mol of CH3CH2CHO. The product formed after that undergoes cross Cannizzaro reaction with HCHO.