Limestone & Environment Flashcards

1
Q

Limestone is mainly:

A

Calcium Carbonate (CaCO₃)

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2
Q

Limestone is quarried from the ground and used mainly for:

A

Building Materials

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3
Q

Cement is made by heating _________ with ________ in _________.

A
  • Powdered limestone
  • Clay
  • Rotary Klin
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4
Q

In blast furnace, limestone is used to __________ found in the iron ore turning it as slag (calcium silicate).

A

Remove impurities

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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
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6
Q

Lime is used to ____________.

A

Neutralise acid soils

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7
Q

_______ is used with ________ and ______ to make glass by heating.

A
  • Lime
  • Sodium carbonate
  • Sand
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8
Q

Uses of limestone:

A
  • Neutralise acidic soil
  • Concrete (building material)
  • Cement (building material)
  • Used in glass industry
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9
Q

Disadvantages of limestone:

A

It will react with acid rain and will wear away over time.

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10
Q

Disadvantages of (chemical) industry?

A
  • Air pollution
  • Water pollution
  • Land pollution
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11
Q

Reduce the negative impact of (chemical) industry?

A
  • Reuse

* Reduce Recycle

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