Organic synthesis via enolates MCQ B.Sc. TY Semester V Organic Chemistry

B.Sc. Third year Undergraduate degree course Semester Fifth Organic chemistry 

Chapter - Organic Synthesis via Enolates.

Multiple Choice questions

1. Which of the following compound contain active methylene group…?
a)  CH₃CO CH₂COCH₃
b) CN-CH₂-COCH₃
c)  Both a and b
d) None of these

2. Which of the following does not have an active methylene group?
a)  CH₃CH₂NO₂
b) CH₃CO CH₂COCH₃
c)  CN-CH₂-COCH₃
d) CH₃CH₂NH₂

3. Which of the following is not an active methylene compound?
a)  Diethyl malonate
b) Acetoacetic ester
c) Cyanoacetic ester
d) Pentanoic acid

4. Name of the following reaction is...

a)  Schemidt condensation
b) Claisen condensation
c)  Aldol condensation
d) None of these

5.Which of the following is most acidic compound

a)

b)

c)

d)

6.Which are the most acidic α-hydrogens in the following compounds?

a)  I
b) II
c) III
d) IV

7. Which of the following α-hydrogen shows more acidity ..

a)  A
b) B
c)  C
d) D

8. Acetoacetic ester on reaction with urea gives..
a)  Diethyl malonate
b) Acetoacetic ester
c)  Cyanoacetic ester
d) 4-methyl uracil

9. Choose the correct compound which shows keto enol toutomerism
a)  CH3CH2OH
b) Acetone
c)  Benzene
d) Phenol

10.In the given example

a)  1 is enol form 2 is keto form
b) 2 is enol form 1 is keto form
c)  1 is enol form 2 is enol form 

 d) None of these

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