Pharm.D_POC_Alkyl halides_MCQ

Pharm.D_POC_Alkyl halides_MCQ

1.Which of the following is not a halogenoalkane?
A) Bromobutane   
B) chloropropane
C) ethoxyethane   
D) 3-iodopentane

2.Which one of the following is a tertiary alkylhalide?
A) 1-bromobutane 
B) 2-bromobutane
C) 1-bromo-2-methylpropane 
D) 2-bromo-2-methylpropane

3. Which carbon-halogen bond has the greatest polarity?

A) C-Br     

B) C-Cl

C) C-F     

D) C-I

4.Which carbon-halogen bond has the lowest bond enthalpy?

A) C-Br     

B) C-Cl

C) C-F     

D) C-I

5.Stereochemistry of SN2 reaction involves  

a) Inversion of configuration 

b) Retention of configuration 

c) Racemisation 

d) Epimerisation

6.Stereochemistry of SN1 reaction involves  

a) Inversion of configuration 

b) Retention of configuration 

c) Racemisation 

d) Epimerisation

7.Stereochemistry wise, what predominates in SN2 reaction  

a) Inversion of configuration 

b) Retention of configuration 

c) Enolisation 

d) Epimerisation

8.What is the relative order of reactivity of alkyl halides towards SN1

a) 3°>2°>1°   

b) 1°>2°>3°  

c) 2°>3°>1°  

d) 1°>3°>2°  

9.What is the relative order of reactivity of alkyl halides towards SN2

a) 3°>2°>1°   

b) 1°>2°>3°  

c) 2°>3°>1°  

d) 1°>3°>2°  

10.Which of the following intermediate undergos rearrangement 

a) Free radical 

b) Carbocation 

c) Carbanion

d)Carbene