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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: (1) A < B < C < D (2) A < D < C < B (3) D < C < B < A (4) D < C < A < B
- A < B < C < D
- A < D < C < B
- D < C < B < A
- D < C < A < B
Correct answer: A < D < C < B
Solution
The correct order reflects the bond lengths based on the bond types; single bonds (C–H) are the shortest, followed by triple bonds (C≡N), then double bonds (C=O), and finally, the longer single bond (C–O) due to its higher electronegativity and bond character.
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