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SS3: CHEMISTRY - 2ND TERM

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  1. Quality of Petrol (Octane Number)| Week 1
    1 Topic
    |
    1 Quiz
  2. Natural Gas | Week 2
    3 Topics
    |
    1 Quiz
  3. Introduction to Metals | Week 3
    3 Topics
    |
    1 Quiz
  4. The Alkali Metals | Week 4
    4 Topics
    |
    1 Quiz
  5. Alkaline Earth Metals | Week 5
    4 Topics
    |
    1 Quiz
  6. Aluminium & Tin | Week 6
    3 Topics
    |
    1 Quiz
  7. Transition Metals of the First Series | Week 7
    4 Topics
    |
    1 Quiz
  8. Ethical, Legal & Social Issues | Week 8
    3 Topics
    |
    1 Quiz
  9. Fats & Oils - Soaps & Detergents | Week 9
    4 Topics
  10. Giant Molecules | Week 10
    6 Topics




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SS3: CHEMISTRY – 2ND TERM Natural Gas | Week 2 Economic Importance of Petroleum
Lesson 2, Topic 3
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Economic Importance of Petroleum

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1. Source of revenue.
2. Creation of jobs.
3. By-products of fractional distillation of petroleum are used in the surfacing of roads, construction of bridges, etc.

Evaluation Questions:

1. What do you understand about natural gas and liquefied natural gas?
2(a). Mention 3 uses of liquefied natural gas.
(b). What are the economic importance of natural gas?
3. What is the problem associated with the use of Pb(C2H5)4, as an additive in petrol?

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Evaluation Questions

1. What do you understand about natural gas and liquefied natural gas?

Answer: Natural gas is a mixture of low molecular mass alkanes and other gases while liquefied natural gas (LNG) is natural gas liquefied under pressure

 

2 (a). Mention 3 uses of liquefied natural gas.

Answer:

– It is used as domestic and industrial fuel
– It is a source of hydrogen and carbon
– It is used in the production of synthetic gas

(b). What are the economic importance of natural gas?

Answer:

– It is used as a source of revenue
– It can be used as a mode of job creation
– The by-product of fractional distillation of petroleum is used in surfacing of roads, construction of bridges etc.

 

3. What is the problem associated with the use of Pb(C2H5)4, as an additive in petrol?

Answer:

It causes severe environmental pollution on combustion with petrol.

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