IGCSE Coordinated Chemistry Workout 4

Which row in the table shows the relative charge of an electron and of a neutron?

• A

• B

• C

• D

An element is in Group VI of the Periodic Table. What information does this give about the element?

• the number of protons in the nucleus

• the number of outer electrons

• the reactivity of the element

• the relative atomic mass of the element

Which process would show that crude oil is a mixture?

• Combustion

• Cracking

• Fractional distillation

• Neutralisation

Crude oil, salt and wood are important raw materials used in industry. Which of these raw materials is used to make alkali, paper and plastics?

• A

• B

• C

• D

Which diagrams show a giant molecular structure?

• 1 only

• 2 only

• 3 only

• 1, 2 and 3

The diagram shows apparatus used for electrolysis. Which row shows the correct labelling for the apparatus? Answers appear in the order X, Y, Z.

• anode, cathode, electrolyte

• electrolyte, cathode, anode

• cathode, anode, electrolyte

• electrolyte, anode, cathode

The diagram shows acid being added to an alkali until it is neutralised. What happens in the flask?

• temperature decreases and the type of reaction is endothermic

• temperature decreases and the type of reaction is exothermic

• temperature increases and the type of reaction is endothermic

• temperature increases and the type of reaction is exothermic

The diagram shows how limestone can be converted into useful products for industry. What are process P and product Q? Answers appear in the order P; Q.

• combustion; an acid

• combustion; an alkali

• decomposition; an acid

• decomposition; an alkali

A small amount of ammonia is present in a sample of hydrogen. What would be the results of tests on the mixture?

• A

• B

• C

• D

Substance R has a high melting point and reacts with an acid to produce hydrogen. What does this show about substance R?

• A

• B

• C

• D