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MCQ on IR spectroscopy: Page-2

The analysis of drug molecules in urine sample are analyzed without separation in

(A) FAB MS

(B) EI MS

(C) Tandem MS

(D) ESI MS

Molecular ion may be absent in

(A) CI

(B) EI

(C) FAB

(D) ESI

Nitrogen rule is applied for compounds containing

(A) Nitrogen

(B) Oxygen

(C) Halogens

(D) All of the above

Even numbered molecular ion on fragmentation yields

Odd numbered ion

(B) Even numbered ion

(C) Both

(D) Cannot be predicted

Molecular ion peak is predominantly in

(A) Cyclic compounds

(B) Conjugated dienes

(C) Aromatic compounds

(D) Mercaptants

Aromatic > conjugated dienes > cyclic > Organic sulfides > Short normal alkanes > Mercaptants