1. Which one of the following is the percentage atom economy of the reaction that converts propene to propane?
A. 91%
B. 93%
C. 95%
D. 100%

Solution

2. The correct IUPAC name for CH₃CH₂CHClCHOHCH₃ is
A. 3-chloropentan-4-ol
B. 3-chloropentan-2-ol
C. 2,3-chloro-pentanol
D. 3,2-chloro-pentanol

Solution

3. Which one of the following chemical compounds contains a chiral carbon centre?
A. glycine
B. glycerol C.
butan-2-o1
D. 1,1-dichloropropane

Solution

4. Which one of the following reactions has the highest atom economy in the production of an organic molecule?
A. complete combustion of propyne, C₃H₄
B. reaction of iodine, I₂ , with propane, C₃H₈
C. reaction of bromine, Br₂, and propene, C₃H₆
D. formation of a dipeptide from alanine, C₃H₇NO₂

Solution

5. A reaction pathway to produce a primary alcohol is shown below.

a. C₄H₈ reacts with HCl(g) to form two unbranched isomers – Compound A and Compound B. Only Compound A can react to produce a primary alcohol. a. Identify the type of reaction that converts C₄H₈ into Compound A. 1 mark

b. Write the semi-structural formula for Compound B in the box provided. 1 mark

c. State the reagent(s) required to convert Compound A into a primary alcohol in the box provided. 1 mark

Solution

d. Propan-1-ol can react with methanoic acid to produce an organic molecule.

i. Identify the catalyst for this reaction. 1 mark

ii. Write a balanced chemical equation for the reaction. 2 marks

iii. Write the systematic IUPAC name for the organic molecule produced. 1 mark

Solution