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MCQ on IR spectroscopy: Page-8

The peak corresponding to 43 is due to

(A) Aldehyde

(B) Methyl ketones

(C) Alcohols

(D) All of the above

Aromatic ketones show peak at m/z=105 is due to

(A) Tropylium ion

(B) Phenonium ion

(C) McLafferty

(D) None

Aliphatic methyl esters at

(A) 28

(B) 74

(C) 31

(D) 60

The intense molecular ion peak is observed in

(A) Aldehydes

(B) Ketones

(C) Substituted pyridines

(D) Alkyl halides

: loss of halides

McLafferty rearrangement is observed in all of the following EXCEPT

(A) Aldehydes

(B) Amides

(C) Ketones

(D) Saturated alcohols