MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils
When compound D is oxidised, the functional group of the first compound formed is:
Think it through first, then pick an option.
- a − OH
- b > C = C <
- c − CHO
- d − COOH
Answer and explanation
Correct answer: c − CHO
D is propanol (from aqueous NaOH); oxidation first gives propanal, with -CHO.
Why the other options are wrong
- a − OH: -OH is D's own group (propanol); oxidation first gives an aldehyde, -CHO.
- b > C = C <: >C=C< is the alkene group; oxidising an alcohol first gives -CHO.
- d − COOH: -COOH comes from the second oxidation; the first gives -CHO.
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