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WorksheetsExtraction of zinc and copper
Total questions: 13
Worksheet time: 9mins
What acid is sulfur dioxide used to make?
Ethanoic acid
Hydrochloric acid
Citric acid
Sulfuric acid
Zinc is used in alloys such as
(a)
The balanced equation for the reaction of zinc oxide and coke is
Zn + CO —> Zn + C
2Zno + C —> Zn + CO
zinc oxide + carbon —> Zinc + Carbon monoxide
Zn + C —> Zn + CO
Zinc blende is another name for zinc sulfide
True
False
Zinc is not used in galvanizing iron
False
True
Carbon reduces Zinc oxide because zinc is higher than carbon in the reactivity series
True
False
The method used in the extraction of copper is
The refining of copper by electrolysis
The refining of copper by Galvanizing
graphite electrodes are used in the process of refining copper by electrolysis
True
False
The cathodes (a) mass as copper deposits on it
the anode loses mass as copper dissolves from it
True
False
The color of copper || sulfate solution ________.
Remains the same
Changes to blue
fades from dark blue to light blue
turns black
the impure copper is placed at the cathode
False
True
The anode sludge usually contains:
gold
Platinum
Iron
tin
