IB chemistry : Organic Chemistry

How many structural isomers exist with the formula C₃H₅Cl₃?

• 3

• 4

• 5

• 6

Which substance is not produced during the combustion of alkanes?

• CO₂

• CO

• C

• H₂

Propene is converted to propanone in a two stage process.

Propene → X → Propanone

What is the formula of compound X?

• CH₃CHBrCH₃

• CH₃CH₂CH₂Br

• CH₃CHOHCH₃

• CH₃CH₂CH₂OH

Which three compounds can be considered to be a homologous series?

• CH₃OH, CH₃CH₂OH, CH₃CH₂CH₂OH

• CH₃CH₂OH, CH₃CHO, CH₃COOH

• CH₃CH₂CH(OH)CH₃, CH₃CH₂CH₂CH₂OH, (CH₃)₃COH

• CH₃CH₂CH₂CH₂OH, CH₃CH₂OCH₂CH₃, (CH₃)₂CH₂CHO

What is the IUPAC name for CH₃CH₂CH(CH₃)CH₃?

• 1,1-dimethylpropane

• 2-ethylpropane

• 2-methylbutane

• 3-methylbutane

When bromine water is shaken with a liquid organic compound, it is rapidly decolourized. What can be determined from this test?

• The compound is an alcohol.

• The compound is an alkane.

• The compound is an alkene.

• The compound is an iodoalkane.

Which conditions are required to obtain a good yield of a carboxylic acid when ethanol is oxidized using potassium dichromate(VI), K₂Cr₂O₇(aq)?

I. Add sulfuric acid

II. Heat the reaction mixture under reflux

III. Distill the product as the oxidizing agent is added

• I and II only

• II and III only

• I and III only

• I, II and III

What is the product of the oxidation of butan-2-ol?

• But-2-ene

• Butanoic acid

• Butanal

• Butanone

Which is a tertiary halogenoalkane?

• CH₃CH₂CH₂Br

• CH₃CH₂CH(CH₃)Cl

• C(CH₃)₃Br

• CH₃CHClCH₂CH₃

Which equations represent the incomplete combustion of methane?

I. CH₄(g) + 2 O₂(g) → CO₂(g) + 2 H₂O(g)

II. CH₄(g) + 1 1/2 O₂(g) → CO(g) + 2 H₂O(g)

III. CH₄(g) + O₂(g) → C(s) + 2 H₂O(g)

• I and II only

• I and III only

• II and III only

• I, II and III