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Solution


Q.

The correct increasing order of C–H (A), C–O (B), C=O (C) and C≡N (D) bonds in terms of covalent bond length is :      [2026]
1 D < C < A < B  
2 D < C < B < A  
3 A < B < C < D  
4 A < D < C < B  

Ans.

(4)

C-H (A)  107 pm

C≡N (D)  116 pm

C-O (B)  143 pm

C=O (C)  121 pm