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MCQ on NMR spectroscopy: Page-9

The signal of proton is interfered by adjacent 13C nucleus is known as

(A) Homonuclear spin coupling

(B) Heteronuclear spin coupling

(C) Homonuclear shielding

(D) Heterogeneous shielding

Equivalent protons in a molecules will have

(A) Same environment

(B) Same chemical shift

(C) Same shielding effect

(D) All of the above

Coupling constant of two nuclei is defined as

(A) Ratio of chemical shifts

(B) Distance between splitted peaks in Hz

(C) Difference of chemical shifts

(D) Ratio of absorption frequencies

How many number of peak splittings will be observed for secondary proton in the following compound?

(A) 3

(B) 4

(C) 6

(D) 12

Compared with vinylic protons, aromatic protons will have

(A) Low chemical shift

(B) High chemical shift

(C) No NMR signal

(D) High splitting