Free Radical Substitution Reaction

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| By Lohsj

Lohsj

Community Contributor

Quizzes Created: 4 | Total Attempts: 5,702

Questions: 10 | Attempts: 1,189 | Updated: Mar 22, 2023

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Free Radical Substitution Reaction - Quiz

Answer the questions after watching the video.

Please key in your name in the box below in the following format: Class Name
Eg. 4S1 Alex Lim

Questions and Answers

1.

Which of the following best represents the chemical specie responsible for the initiation reaction?
- A.
  
  (a)
- B.
  
  (b)
- C.
  
  (c)
- D.
  
  (d)
Correct Answer
B. (b)
2.

Which of the following is an essential condition for the free radical substitution reaction?
- A.
  
  Iron catalyst
- B.
  
  Nickel catalyst
- C.
  
  UV light
- D.
  
  Heating
Correct Answer
C. UV light

Explanation
UV light is an essential condition for the free radical substitution reaction because it provides the energy required to break the bond between the reactant molecules and create highly reactive free radicals. These free radicals then go on to react with other molecules, resulting in the substitution reaction. Without UV light, the reaction would not proceed as the necessary activation energy would not be met. The iron and nickel catalysts, as well as heating, are not necessary for this specific type of reaction.

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2
0
3.

What is the identity of the white fumes observed in the video?
- A.
  
  Ammonia gas (NH3)
- B.
  
  Ammonium chloride (NH4Cl)
- C.
  
  Hydrochloric acid (HCl)
- D.
  
  Hydrogen bromide (HBr)
Correct Answer
D. Hydrogen bromide (HBr)

Explanation
The white fumes observed in the video are identified as hydrogen bromide (HBr).

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4.

The following molecule is a product of the reaction.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The molecule mentioned in the question is a product of the reaction.

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1
0
5.

The following molecule is a product of the reaction.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The given statement is true. It implies that the molecule mentioned is indeed a product of the reaction.

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6.

The following molecule is a produce of the reaction.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The given molecule is indeed a product of the reaction.

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7.

The following molecule is a product of the reaction.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
FRS does not shorten the length of the original alkane.

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8.

The following molecule is a product of the reaction.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True
9.

The following molecule is a product of the reaction.
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
FRS does not arbitrarily lengthen the carbon chain of the original hydrocarbon (ie. hexane). It may lengthen in multiples of the number of carbons in the hydrocarbon.

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10.

The following molecule is a product of the reaction.
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
The given answer is true because the statement mentions that the molecule is a product of the reaction. Since the molecule is mentioned specifically as a product, it implies that it is indeed a result of the reaction.

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1
0