Question:
\(N_2\) molecule does not show a pure vibrational (IR) spectrum because:
\(N_2\) molecule does not show a pure vibrational (IR) spectrum because:
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IR activity requires a change in dipole moment during vibration.
Updated On: Jul 3, 2026
- Triple bond in \(N_2\) is very strong
- The dipole moment in \(N_2\) is zero
- Both (A) and (B)
- None of the above
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The Correct Option is B
Solution and Explanation
Step 1: IR activity requires change in dipole moment during vibration.
Step 2: N2 is homonuclear, symmetric, zero dipole throughout stretching.
Step 3: Bond strength affects frequency (force constant), not IR activity.
\[\boxed{\text{Zero dipole moment makes } N_2 \text{ IR-inactive}}\]Was this answer helpful?
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