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MCQ on NMR spectroscopy: Page-10

Which of the following produces magnetic anisotropy

(A) Hydrogen bonding

(B) Aromatic ring system

(C) Electronegativity

(D) pH

Boltzmann distribution is expressed by

(A) nH / nL=e*-ϒEI/KT

(B) nL/nH=e*-ϒE/KT

(C) nH / nL=e* -ϒE /BKT

(D) None of the above

The increase in the applied magnetic field strength results in

(A) Increase in chemical shift

(B) Decrease in chemical shift

(C) Increase in coupling constant

(D) Decrease in coupling constant

Nuclei with even number of protons and even number of neutrons will have spin quantum number as

(A) 0

(B) 1/2

(C) 3/2

(D) 1

A group producing deshielding effect causes

(A) Increase in chemical shift

(B) Decrease in chemical shift

(C) Splitting of the peaks

(D) Converging of peaks