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WorksheetsIGCSE Coordinated Chemistry Workout 25
Total questions: 10
Worksheet time: 10mins
What is limestone?
calcium carbonate
calcium chloride
calcium hydroxide
calcium oxide
Four molecules are shown.
Which structure represents ethanol?
A
B
C
D
The diagram represents the structure of a lithium atom.
Which particles are found in the centre of the atom?
proton and electron
proton and neutron
proton and nucleus
electron and neutron
Three minerals containing iron are listed.
What is the total number of different elements contained in all three minerals?
3
4
5
16
The diagram shows the electrolysis of a compound. When the switch is closed, the solution around electrode P turns orange because a halogen is formed. The positive electrode P is called the ……1……, and the halogen is ……2…… .
Which words complete gaps 1 and 2?
1 = anode; 2 = bromine
1 = anode; 2 = chlorine
1 = cathode; 2 = bromine
1 = cathode; 2 = chlorine
Which statement about chemical reactions is correct?
Endothermic reactions result in a temperature decrease.
Endothermic reactions result in a temperature increase.
Exothermic reactions always produce a large temperature rise.
Exothermic reactions always produce a small temperature rise.
In a manned spacecraft, carbon dioxide is removed from the air by reacting with potassium hydroxide.
Which type of reaction occurs?
decomposition
neutralisation
precipitation
redox
Which test and result show that a fertiliser contains nitrate ions?
A
B
C
D
The diagram shows part of the Periodic Table.
Which letter shows the position of a metal with a low melting point?
A
B
C
D
A green halogen gas is bubbled through a potassium halide solution. The potassium halide solution turns brown–black.
What is the halogen and what is the potassium halide solution?
A
B
C
D
