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MCQ on NMR spectroscopy: Page-4

The approximate value of methyl proton in NMR is

(A) 1.3

(B) 1.5

(C) 0.9

(D) 2.5

Boltzmann distribution indicates

(A) The relative no. of protons present in the excited state and ground state

(B) Relative no. of neutrons present in the excited state and ground state

(C) Relative no. of nucleus present in the excited state and ground state

(D) All of the above

In NMR spectrum the nuclei in up field resonate at

(A) High frequency

(B) Low frequency

(C) It is constant throughout the spectrum

(D) It doesn’t depends on chemical shift

The nuclei that doesn’t give NMR signal is

(A) 15N

(B) 11B

(C) 19F

(D) 31P

Signal splitting in NMR arises from

(A) Shielding effect

(B) Spin-spin decoupling

(C) Spin-spin coupling

(D) Deshielding effect