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WorksheetsIGCSE Coordinated Chemistry Workout 29
Total questions: 10
Worksheet time: 10mins
Which dot-and-cross diagrams represent the outer-shell electrons in molecules of nitrogen and of ethene?
A
B
C
D
The diagram represents a molecule of butane. What is the formula of butane?
C2H5
C4H8
C4H10
C10H4
The equation for the reaction between zinc and dilute hydrochloric acid is
Zn + 2HCl → ZnCl2 + H2
What is the volume of hydrogen gas produced by 3.25 g of zinc?
1.2 dm3
2.4 dm3
4.8 dm3
24.0 dm3
Which statement about electroplating iron with chromium is correct?
A catalyst is used.
The anode is chromium.
The electrolyte contains aqueous iron ions.
The electrolyte contains solid chromium ions.
Which row describes an endothermic reaction?
A
B
C
D
Calcium carbonate reacts with dilute hydrochloric acid. Equal masses of different-sized pieces of calcium carbonate are placed in four test-tubes, as shown.
Equal volumes of the same concentration of dilute hydrochloric acid are added to each test-tube. Which test-tube shows the lowest rate of reaction?
1
2
3
4
Some properties of the Group VII elements are shown. Which statement about halogens at room temperature and pressure is correct?
Astatine is a colourless solid.
Bromine is an orange-red solid.
Fluorine is a pale yellow gas.
Iodine is a brown liquid.
Which metal can only be extracted by electrolysis of a molten compound?
copper
iron
sodium
zinc
Petroleum is separated into fractions by fractional distillation. Which statement about the fractions is correct?
The fraction at the bottom contains the molecules with the lowest boiling points.
The fraction at the bottom contains the smallest molecules.
The fraction at the top contains the molecules used for cracking.
The fraction at the top contains the molecules with the weakest intermolecular attractive forces.
Which row describes the melting point and boiling point of salt water?
A
B
C
D
