Year 12 Chemistry Chapter 10

Which one of the following molecules contains a chiral carbon?

• CH₂CHCH₂CH₃

• CH₂FCH₂CH₂Cl

• CH₃CHOHCH₂CH₃

• CH₃CH₂CFClCH₂CH₃

A compound has the skeletal formula shown to the left.

The molar mass of the compound is

• 71 g mol⁻¹

• 74 g mol⁻¹

• 85 g mol⁻¹

• 86 g mol⁻¹

Aspartame has only

• one chiral centre.

• two stereoisomers.

• four optical isomers.

• three structural isomers.

What is the IUPAC name of the molecule shown to the left?

• 3-hydroxy-3-ethyl-propan-1-amine

• 3-amino-1-methylpropan-1-ol

• 3-hydroxypentan-1-amine

• 1-aminopentan-3-ol

How many structural isomers have the molecular formula C₃H₆BrCl?

• 4

• 5

• 6

• 7

Which one of the following statements about the compounds benzene and cyclohexane is incorrect?

• Each compound has a different empirical formula and a different molecular formula.

• Both compounds consist of a ring structure with six carbon atoms and single bonds.

• The compounds are hydrocarbons and have different structural formulas.

• Benzene has a higher percentage composition by mass of carbon than cyclohexane.

The structure of one isomer of a compound is shown to the left.

• optical isomerism only.

• geometric isomerism only.

• both optical and geometric isomerism.

• neither optical nor geometric isomerism.

How many of the carbon atoms in the amino acid threonine are chiral?

• 1

• 2

• 3

• 4

Which one of the following statements concerning the compound C₆H₆ is correct?

• The compound is known as cyclohexane and is not soluble in water.

• The compound is known as benzene and is soluble in water.

• The compound can undergo substitution reactions because there are no carbon–carbon double bonds

  in the molecule.

• The compound can undergo addition reactions because three carbon–carbon double bonds are present

  in the molecule.

Which of the following contains a chiral carbon?

• Name: 2-methylbut-1-ene

  Semi-structral Formula: CH₂C(CH₃)CH₂CH₃

• Name: 2-chlorobutane

  Semi-structral Formula: CH₃CHClCH₂CH₃

• Name: propanoic acid

  Semi-structral Formula: CH₃CH₂COOH

• Name: 1,2-dichloroethene

  Semi-structral Formula: ClCHCHCl