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:

Chemistry · Chemical Bonding

JEE Main 2026 — 21 January, Evening Shift — Question 58

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

Option A:
A $<$ B $<$ C $<$ D
Option B:
A $<$ D $<$ C $<$ B
Correct
Option C:
D $<$ C $<$ B $<$ A
Option D:
D $<$ C $<$ A $<$ B

Answer: B

Step-by-step solution

$\mathrm{C}-\mathrm{H}(\mathrm{A}) 107 \mathrm{pm}$ $\mathrm{C} \equiv \mathrm{N}(\mathrm{D}) 116 \mathrm{pm}$ C-O(B) 143 pm $\mathrm{C}=\mathrm{O}(\mathrm{C}) 121 \mathrm{pm}$

Answer key and solution verified before publishing.

Practise Chemical Bonding

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Solve a similar one free

Exam: JEE Main 2026
Paper: 21 January, Evening Shift
Subject: Chemistry
Chapter: Chemical Bonding
Topic: Back Bonding, Bent's Rule, Analysis of Bond Parameters + Miscellaneous Cases

Given below are two statements : one is labelled as Statement I and the other is labelled as Statement II : Statement I: The correct order…

Answer: B

Step-by-step solution

Practise Chemical Bonding

More Chemical Bonding questions from this paper