Help with a few text questions please? 1.In which of the following are the compo

Question

Help with a few text questions please?

1.In which of the following are the compounds listed in order of decreasing acidity?

A.CH3CO2H > CH3CH2OH > C6H5OH > H2O

B.C6H5OH > CH3CO2H > H2O > CH3CH2OH

C. CH3CO2H > H2O > C6H5OH > CH3CH2OH

D. H2O > CH3CO2H > C6H5OH > CH3CH2OH

E. CH3CO2H > C6H5OH > H2O > CH3CH2OH

2. The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a ________ group.

A.carbamate
B.carbonate
C.urethane
D.carboxyl
E.carboxylate

3.The hydrolysis of esters, amides, and nitriles:

A.can be carried out under acidic or basic conditions.
B.must be acid-catalyzed.
C.must be base-catalyzed.
D.should be carried out at pH 7.0 for optimum efficiency.
E.is not pH dependent

4.) The relative reactivity of acyl compounds toward nucleophilic substitution is:

A. amide > ester > acid anhydride > acyl chloride
B.acyl chloride > ester > acid anhydride > amide
C.ester > acyl chloride > acid anhydride > amide
D.acyl chloride > acid anhydride > ester > amide
E.acid anhydride > acyl chloride > ester > amide

5) Predict the major organic product of the reaction between N-methylbenzamide and sodium propanoate.

A.N-propylbenzamide
B.propyl benzoate
C.phenyl propanoate
D.benzoic propanoic anhydride
E.no reaction

6.) Which of the following classes of organic compounds has the greatest strength as a base?

A.aromatic amines
B.aliphatic amines
C.alkoxides
D.carboxylates
E.phenoxides

Explanation / Answer

1) Of the following list of compounds, the decreasing acidity is seen with,

E) CH3CO2H > C6H5OH > H2O > CH3CH2OH

Carboxylic acid is more acidic than phenol which in turn is more acidic than water. the least acidic one would be ethanol.

2) The combination of a carbonyl group and a hydroxyl group on the same carbon atom is called a carboxylate group.

E.carboxylate

3)The hydrolysis of esters, amides, and nitriles:

A.can be carried out under acidic or basic conditions.

4) The relative reactivity of acyl compounds toward nucleophilic substitution is:

D.acyl chloride > acid anhydride > ester > amide

5) The major organic product of the reaction between N-methylbenzamide and sodium propanoate would be,

D.benzoic propanoic anhydride

6.) Of the following classes of organic compounds the greatest strength as a base would be of,

C.alkoxides

Alcohols being weakest acids generate the strongest conjugate bases.

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