Latest updates

Nanotechnology questions 17 September 2019

1. (a) Explain what is meant by term ‘nanotechnology’.(b) Describe the basic structure of a nanotube in terms of graphene and buckminsterfullerene.(c) Discuss reasons why the rise in the use of nanoparticles... more

Understanding the activity series10 September 2019

There can be considerable confusion for standard level students over the position of certain metals in the activity series given in Section 25 the IB data booklet. One of the understandings in the IB... more

Polymers questions 2 September 2019

1. (a) Explain why the atom economy for most addition polymers is close to 100%.(b) Nylon 6,6 can be made by reacting 1,6-diaminohexane, H2N-(CH2)6-NH2, with hexanedioyl dichloride, ClCO-(CH2)4-COCl.... more

Liquid crystals questions 23 August 2019

1. One compound in use in liquid crystal displays is 4-pentyl-4’-cyanobiphenyl.Explain the importance of the following features, which help to give the compound good liquid crystal properties: more

Catalysts questions 19 August 2019

1. Catalytic converters used in automobiles typically contain platinum, palladium and/or rhodium metal coated onto a honeycomb ceramic surface. They convert oxides of nitrogen, NOx, carbon monoxide and... more

The danger of prolonged use of proton pump inhibitors 5 July 2019

Students studying the medicinal chemistry option need to be able to explain the three main ways in which excess stomach acid can be controlled (D.4 pH regulation of the stomach). The first way is straightforward... more

HL Questions on the options5 July 2019

A.1 Materials science introduction questions A.2 Metals & ICP spectroscopy questionsA.3 Catalysts questions A.4 Liquid crystals questions A.5 Polymers questions A.6 Nanotechnology questions more

SL Questions on the options5 July 2019

A.1 Materials science introduction questions A.2 Metals & ICP spectroscopy questionsA.3 Catalysts questions A.4 Liquid crystals questions A.5 Polymers questions A.6 Nanotechnology questions more

HL Paper 3 Section A questions5 July 2019

Section A on Paper 3 is worth 15 marks and will contain a data response question and one or more short answer questions on experimental techniques. Since there are only fifteen marks it seems likely that... more

SL Paper 3 Section A questions5 July 2019

Section A on Paper 3 is worth 15 marks and will contain a data response question and one or more short answer questions on experimental techniques. Since there are only fifteen marks it seems likely that... more