1
Q
Limestone is mainly:
A
Calcium Carbonate (CaCO₃)
2
Q
Limestone is quarried from the ground and used mainly for:
A
Building Materials
3
Q
Cement is made by heating _________ with ________ in _________.
A
- Powdered limestone
- Clay
- Rotary Klin
4
Q
In blast furnace, limestone is used to __________ found in the iron ore turning it as slag (calcium silicate).
A
Remove impurities
5
Q
Lime/Quicklime/Calcium Oxide is produced by ________. This is called ___________.
A
- Roasting limestone
- Thermal decomposition
Calcium Carbonate (heat)→ Calcium Oxide + Carbon Dioxide CaCO₃ (heat)→ CaO + CO₂
6
Q
Lime is used to ____________.
A
Neutralise acid soils
7
Q
_______ is used with ________ and ______ to make glass by heating.
A
- Lime
- Sodium carbonate
- Sand
8
Q
Uses of limestone:
A
- Neutralise acidic soil
- Concrete (building material)
- Cement (building material)
- Used in glass industry
9
Q
Disadvantages of limestone:
A
It will react with acid rain and will wear away over time.
10
Q
Disadvantages of (chemical) industry?
A
- Air pollution
- Water pollution
- Land pollution
11
Q
Reduce the negative impact of (chemical) industry?
A
- Reuse
* Reduce Recycle
Chemistry
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