Asked in FBISE Chemistry 2023 — Paper 2 2023

The characteristic signal of carbonyl carbon if acetone in I.R spectrum will be detected at:

Correct answer: D. 1720cm-1

  • A. 3200cm-1
  • B. 1200cm-1
  • C. 800cm-1
  • D. 1720cm-1

Explanation

This is the correct answer. The characteristic signal of the carbonyl carbon in acetone (CH3COCH3) is typically found in the region around 1720 cm-1. This corresponds to the stretching vibration of the C=O bond in the carbonyl group.

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