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Solution


Q.

Identify the correct set of reagents or reaction conditions 'X' and 'Y' in the following set of transformation.                 [2024]
1 X = dil. aq. NaOH, 20°C, Y = Br2/CHCl3  
2 X = conc. alc. NaOH, 80°C, Y = HBr/acetic acid  
3 X = dil. aq. NaOH, 20°C, Y = HBr/acetic acid  
4 X = conc. alc. NaOH, 80°C, Y = Br2/CHCl3  

Ans.

(2)

aq. NaOH causes substitution and alc. NaOH causes elimination.