Properties and Chemistry of Lime
This is a multiple-choice quiz. Some questions have more than one answer.
1. Lime is an:
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Acid
Alkali
2. The chemical formula for making lime is:
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CaCO3 + heat = CaO + CO2
CuCO3 + heat = CuO + CO2
CaCO3 + heat = CaO + H2O
3. The chemical formula for making slaked lime is:
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CaO + H2O = Ca(OH)2
CaO + CO2 = CaCO3
CaCO3 + H2O = Ca(OH)2
4. Lime and lime products are used for:
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Making
Making
Making
Making
Mortar
iron and steel
bronze
drinking water safe
5. Lime is used in sugar manufacture to:
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Extract dissolved impurities from the raw juice
Make the raw juice more acidic
Colour the sugar
6. Precipitated calcium carbonate (made from lime) is used in toothpaste because
it is:
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Acidic
Abrasive
Absorbent
7. Lime is used for protecting the environment because it:
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Reacts with water
Neutralises acidic liquids and gases
Dissolves pollutants