Older MCQs might not have the typical A, B, C,
D
choices. They
have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such
combinations to the answer.
A
1, 2 and 3 are correct
B
1 and 2 only are correct
C
2 and 3 only are correct
D
1 only is correct
explain what is meant by a chiral centre and that such a centre gives rise to two optical isomers (enantiomers)
understand and use systematic nomenclature of simple aliphatic organic molecules with functional groups detailed in the table on pages 29 and 30, up to six carbon atoms (six plus six for esters, straight chains only for esters and nitriles)
deduce the number of carbon atoms, n, in a compound using the \([M + 1]^+\) peak and the formula \(n = rac{100 imes ext{abundance of } [M + 1]^+ ext{ion}}{1.1 imes ext{abundance of } M^+ ext{ion}}\)
