Question 4(a)

i) Give specific example for geometrical isomer and optical isomer

ii) Give specific example for chiral molecules and achiral molecules

Question 4(b)

i) 2-amino-3-hydroxybutanoic acid has two asymmetric centres. Draw the structures of its stereoisomers using Fischer projection.

ii) 2-amino-3-hydroxybutanoic acid has two asymmetric centres. Determine the configuration (R,S) of each of chiral carbon