CAMBRIDGE IGCSE EXAM QUESTIONS from Paper 2

Alkanes are saturated hydrocarbons. What do you understand by (i)saturated (ii)hydrocarbons?

Choose from the list of compounds to answer the question?

calcium carbonate                           carbon dioxide
methane      sodium hydroxide        iron(III) oxide
 

Name the compound which is a transition metal compound.

Choose from the list of compounds to answer the question?

calcium carbonate                     carbon dioxide

lead(II) bromide     methane      sodium hydroxide

Name the compound which produces brown fumes at the anode when electrolysed.

Choose from the list of compounds to answer the question?

calcium carbonate                     carbon dioxide

lead(II) bromide     methane      sodium hydroxide

Name the compound which is used to manufacture lime.

Choose from the list of compounds to answer the question?

calcium carbonate                     carbon dioxide

lead(II) bromide     methane      sodium hydroxide

Name the compound which forms an alkaline solution in water.

Choose from the list of compounds to answer the question?

calcium carbonate                     carbon dioxide

lead(II) bromide     methane      sodium hydroxide

Name the compound which is the main constituent of natural gas.

At a high-temperature iron(III) oxide is reduced by carbon:

${\mathrm{Fe}}_2{\mathrm{O}}_3+3\mathrm{C}\to 2\mathrm{Fe}+3\mathrm{CO}$

Explain how the equation shows that iron(III) oxide is reduced by carbon.

Copy and complete these sentences about the extraction of iron using words from the list.
bauxite     blast             converter      hematite
lime          limestone     sand             slag
Iron is extracted from ........ by mixing the ore with coke and ........ in a ........ furnace. The iron ore is reduced to iron. Impurities in the ore react with calcium oxide to form ........