QUESTION 4 4) Which of the following is a FALSE statement about NMR Spectroscopy

Question

QUESTION 4

4) Which of the following is a FALSE statement about NMR Spectroscopy?

A) The spectroscopic absorption region in NMR has LOWER ENERGY than UV-Vis.

B) NMR spectroscopy measures the energy difference between nuclear spin states.

C) The frequency of absorbed electromagnetic radiation in NMR is proportional to the applied external magnetic field.

D) If the 1H absorption frequency at a fixed external magnetic field is 100 MHz, then the 13C absorption frequency at the same external field strength is about 400 MHz.

A) The spectroscopic absorption region in NMR has LOWER ENERGY than UV-Vis.

B) NMR spectroscopy measures the energy difference between nuclear spin states.

C) The frequency of absorbed electromagnetic radiation in NMR is proportional to the applied external magnetic field.

D) If the 1H absorption frequency at a fixed external magnetic field is 100 MHz, then the 13C absorption frequency at the same external field strength is about 400 MHz.

Explanation / Answer

Wrong answer is (D) If the 1H absorption frequency at a fixed external magnetic field is 100 MHz, then the 13C absorption frequency at the same external field strength is about 400 MHz.

correct statement is  If the 1H absorption frequency at a fixed external magnetic field is 100 MHz, then the 13C absorption frequency at the same external field strength is about 25 MHz.

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