The document contains 8 chemistry questions with multiple choice answers. The summary is: 1) The positively polarized carbon atom of a carbonyl group acts as a Lewis acid and electrophile. 2) Treating a nitrile with a Grignard reagent followed by hydrolysis produces a ketone. 3) Oxidizing a secondary alcohol with chromic acid forms a ketone.

1. ) The positively polarized carbon atom of a carbonyl group acts as A) an electrophile and a
Lewis base B) a nucleophile and a Lewis base C) an electrophile and a Lewis acid D) a
nucleophile and a Lewis acid E) both a Lewis acid and a Lewis base 2) Treatment of a nitrile
with a Grignard reagent followed by hydrolyis A) an ester B) a ketone C) an aldehyde D) an
ether E) an alcohol 3) Oxidation of a 2o alcohol with chromic acid results in the production of A)
an ester B) a ketone C) an aldehyde D) an ether E) none of the above 4) An ylide is a molecule
that can be described as a: A) carbanion bound to a negatively charged heteroatom. B)
carbocation bound to a positively charged heteroatom. C) carbocation bound to a carbon radical.
D) carbocation bound to a diazonium ion. E) carbanion bound to a positively charged
heteroatom. 5) Acetals will react with A) H30+ B) NaOCH3 C) PhLi D) CH3CH2MgBr E)
NaBH4 6) What product will result from the reaction shown? A) acetal B) hydrazine C) ester D)
ylide E) ketone 7) Which of the following is a tertiary amine? A) cyclohexylamine B) 3-
pentanamine C) methylamine D) N.N-dimethylaniline E) N-ethyl-1-propanamine 8) When
pentanal reacts with ethylamine under conditions of acid catalysis, the major organic product is
A) a ketone B) a nitrile
Solution
1) The positively polarized carbon atom of carbonyl group acts as
Electrophile and Lewis acid . Hence 1-C
2) Treatment of nitrile with grignard followed by hydorlysis gives ketone
2-B
3) Oxidation of 2 alcohol with chromic acid would result in ketone
3-B
4) An Ylide is carbonanion bounded to positively charged hetero atom
4-E
5) Acetals react with H3O+

2. Hence 5-A
6) Given aldehyde reacts with alchol under acidic medium gives acetal
6-A
7) Teriary amine is N,N dimethy aniline
7-D