Worksheets10.4 Electrophilic addition
Total questions: 14
Worksheet time: 16mins
Name
Class
Date
1.
Which statement is FALSE ?
a)
Electrophile is an electron deficient species
b)
donate a lone pair
c)
Positively charged species
d)
Attack an electron rich region
2.
Reaction mechanism shown below is
a)
Substitution reaction
b)
Nucleophilic substitution
c)
Addition reaction
d)
Bromination reaction
3.
Addition reaction happens for alkene because
a)
stable C=C double bonds
b)
unstable weak π bonds
c)
stable C-C bonds
d)
unstable sigma bond
4.
Diagram shows the formation of
a)
1° carbocation
b)
2° carbocation
c)
3° carbocation
d)
None of the above
5.
Diagram shows the formation of
a)
1° carbocation
b)
2° carbocation
c)
3° carbocation
d)
None of the above
6.
Which carbocation is most stable and why?
a)
1°carbocation because of strong inductive effect
b)
1°carbocation because of weak inductive effect
c)
3°carbocation because of weak inductive effect
d)
3°carbocation because of strong inductive effect
7.
Based on Markovnikov's rule which is the major product shown in diagram.
a)
A
b)
B
c)
Both
d)
None of the above
8.
Based on Markovnikov's rule, A is the major product because
a)
greater positive inductive effect due to 1° carbocation form
b)
greater positive inductive effect due to 2° carbocation form
c)
greater positive inductive effect due to 3° carbocation form
d)
None of the above
9.
Based on Markovnikov's rule, A is the major product because
a)
greater positive inductive effect due to 1° carbocation form
b)
greater positive inductive effect due to 2° carbocation form
c)
greater positive inductive effect due to 3° carbocation form
d)
None of the above
10.
Based on Markovnikov's rule, which is the major product
a)
A
b)
B
c)
Both
d)
None of the above
11.
Based on Markovnikov's rule, A is the major product because
a)
greater positive inductive effect due to 1° carbocation form
b)
greater positive inductive effect due to 2° carbocation form
c)
greater positive inductive effect due to 3° carbocation form
d)
None of the above
12.
Reaction between Benzene + Br2 is called
a)
Electrophilic addition
b)
Electrophilic substitution
c)
Nucleophilic addition
d)
Nucleophilic substitution
13.
Benzene undergo electrophilic substitution NOT addition because
a)
Stability of benzene ring
b)
Stability due to delocalization of π electron in benzene
c)
Delocalization of π electron in benzene
d)
Benzene is unreactive
14.
Benzene undergo nitration reaction. What are the reagents needed?
a)
Concentrated nitric acid
b)
Concentrated nitric and sulfuric acid at room temperature
c)
Concentrated nitric and sulfuric acid at 50C
d)
Concentrated nitric and sulfuric acid at high temperature
100 %
