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MCQ on IR spectroscopy: Page-4

For McLafferty arrangement a fragment ion should possess all of the following EXCEPT

(A) γ-Hydrogen

(B) π-bond

(C) Leaving group

(D) Heteroatom

McLafferty arrangement involves the elimination of

(A) Ammonia

(B) Water

(C) Free radical

(D) Neutral alkene

The McLafferty rearrangement of even numbered fragment ion produces

(A) Even numbered ion

(B) Odd numbered ion

(C) Both

(D) It depends on the structure

When even numbered molecular ion produces even numbered fragment ion, it indicates

(A) Tropylium ion

(B) Loss of methylene

(C) McLafferty rearrangement

The peaks of saturated straight chain hydrocarbon differ by multiples of

(A) 10

(B) 12

(C) 14

(D) 18