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The chemical shifts of CH₃ and CH₂ protons in a molecule are 1.15 and 3.35 ppm, respectively. When the magnetic field is 2T, the absolute difference b
Question



The chemical shifts of CH₃ and CH₂ protons in a molecule are 1.15 and 3.35 ppm, respectively. When the magnetic field is 2T, the absolute difference between the local magnetic fields (in T) for these two protons is

A.

B.

C.

D.

Correct option is C

The local magnetic field experienced by a proton in NMR depends on its chemical shift and the external magnetic field applied. The relationship between the local magnetic field (Blocal) and the chemical shift (δ) is:

Formula: Blocal = δ x Bo
Chemical Shift: The chemical shift is measured in parts per million (ppm), and it reflects the difference in the local magnetic field experienced by different protons in the molecule.
External Magnetic Field: The external magnetic field (Bo) is given in Tesla (T). In this case, Bo = 2T.
Local Magnetic Field: The local magnetic field experienced by each proton can be found by multiplying the chemical shift by the external magnetic field.
Absolute Difference: The absolute difference in local magnetic fields between two protons can be calculated by subtracting the local magnetic fields calculated for each proton.

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