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Solution


Q.

The functional group that shows negative resonance effect is:                          [2024]
1 —OH  
2 —OR  
3 —COOH  
4 —NH2  

Ans.

(3)

Groups of the type –X=Y and –X≡Y act as –M groups. –COOH is –M group.

Groups which have lone pair containing first atom act as +M groups. –OH, –OR and –NH2 are +M groups.