9701 MCQ Solution 78

Question 78: [Inorganic > Group 7]

Chloroethane can be formed from bromoethane in two steps.

Which statements about these steps are correct?
1 Step X involves a nucleophilic substitution. 2 Hot aqueous sodium hydroxide is the reagent in step X. 3 Hot aqueous sodium chloride is the reagent in step Y.

Reference: Past Exam Paper - June 2003 Paper 1 Q38

Solution 78:

Answer: B.

Statement 2 is true because a chiral centre is defined as a carbon with four different substituents and a chiral centre will always display optical isomerism therefore Statement 1 is also true.
Statement 3 could be true however no condition that will prove it happening every time so cannot be true.