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FREE RADICALS

Total questions: 15

Worksheet time: 8mins

Name
Class
Date
1.

Free radicals are electrically

a)

positively charged

b)

negatively charged

c)

neutral

d)

all of above

2.

A free radical has

a)

unpaired electrons

b)

paired electrons

c)

no electrons

d)

even number of electrons

3.

Which radical is most stable

a)
b)
c)
d)
4.

find the most stable free radical

a)
b)
c)
d)
5.

Which undergoes thermal decomposition readily?

a)
b)
c)
d)
6.

Upon heating hept-3-ene in the gas phase, which bond undergoes homolysis most readily?

a)

C1-C2

b)

C2-C3

c)

C3-C4

d)

C5-C6

7.

Which is the main product upon photo-chlorination of methylbutane with Cl2?

a)
b)
c)
d)
8.

Which is the most unlikely product of photo-chlorination of methylbutane with Cl2?

a)
b)
c)
d)
9.

Which is the most unlikely product of bromination of 1-methylcyclohexene with NBS and initiation by photolysis of a peroxide?

a)
b)
c)
d)
10.

Which radical is most stable?

a)
b)
c)
d)
11.

Which bond of 2-methylpentane most readily undergoes homolysis upon heating in the gas phase?

a)

C1-C2

b)

C2-C3

c)

C3-C4

d)

C4-C5

12.

Which is the most unlikely product of photo-chlorination of 2-methyl-3-phenylbutane with Cl2?

a)
b)
c)
d)
13.

Which of the following statements regarding free radicals is false

a)

Free radicals carry a single, unpaired electron

b)

Free radicals are produced as the result of homolytic cleavage of a covalent bond

c)

A free radical can interact with a molecule to generate a new free radical species

d)

Free radicals do not occur naturally in the body

14.
a)

II > I > III > IV

b)

III > II > I > IV

c)

I > II > III > IV

d)

IV > III > I > II

15.

Which is the most stable free radical

a)
b)
c)
d)