CAIE IGCSE Chemistry: Chlorination of Alkanes Question Bank

Practise alkane chlorination by using ultraviolet light, monosubstitution products and equations that include HCl.

Exam points

state that ultraviolet light provides activation energy for alkane chlorination
distinguish photochemical substitution from addition or catalytic reactions

[Maximum number: 3]

The table shows the structures of four hydrocarbons.

Table for Question 11.4.4—Substitution reaction of alkanes with question 1 — CAIE IGCSE Chemistry

(a)

Compound P undergoes a substitution reaction with chlorine.

[ 3 ]

(i)

State a condition required for this reaction to occur.

[ 1 ]

(ii)

Write a chemical equation for this reaction.

[ 2 ]

$\mathrm{C}_{2} \mathrm{H}_{6}+\mathrm{Cl}_{2} \rightarrow \mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}+\mathrm{HCl}$

1 mark for $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Cl}$

1 mark for the rest of the equation

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11.4.4—Substitution reaction of alkanes with question 1

Question (a)

Question (i)

Question (ii)