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NEET Chemistry Solved Question Paper 2010

Multiple Choice Questions

41.

Which one is most reactive towards electrophilic reagent?

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42.

Acetamide is treated with the following reagents separately. Which one of these would yield methylamine?

NaOH - Br₂
Sodalime
Hot conc. H₂SO₄
Hot conc. H₂SO₄

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43.

Which of the following statements about primary amines is false?

Alkyl amine are stronger bases than aryl amines
Alkyl amines reacts with nitrous acid to produce alcohols
Aryl amines react with nitrous acid to produce phenols
Alkyl amines are stronger base than ammonia

44.
Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

CH₃COOCH₃

CH₃CONH₂

CH₃COOCOCH₃

CH₃COOCOCH₃

CH₃COOCOCH₃

Lesser the electron density of acyl carbon atom, more will be the susceptibility of a nucleophile to attack it.
The Cl atom has strong - I effect and weakest +R effect because of the weak π-bond between the small sized C- atom and large sized Cl atom. Thus, in CH₃COCl, acyl carbon has least electron density and hence, more susceptible for nucleophilic attack.

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