JEE Main 2026 Jan 21 Shift 2, Chemistry Q14: Important Concepts Of Chemical Bonding

JEE Main2026Jan 21, Shift 2Chemistry

The correct increasing order of C – H(A), C – O(B), C = O(C) and C $\equiv$ N(D) bonds in terms of covalent bond length is:

Solution

Typical bond lengths: C–H $\approx 107$ pm, C $\equiv$ N $\approx 116$ pm, C=O $\approx 121$ pm, C–O $\approx 143$ pm.

Increasing order: A (C–H) < D (C $\equiv$ N) < C (C=O) < B (C–O).

Concept behind this question

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