Saturday, August 11, 2012

8th Science Ch.5.Coal and Petroleum Assignments for Edugainer

CLASS VIII   SCIENCE CHAPTER – 5 Coal and Petroleum  Assignment
Q.1 Fill in the blanks:-
(i) On heating in air, coal mainly produces ________ gas.
(ii) ________ is an almost pure form of carbon.
(iii) Coal tar is a mixture of about ________ substance..
(iv) Now a days ________, a petroleum product is used in place of ________ for metalling the roads.
(v) ________ is obtained during the processing of wood to get coke.
Q.2 What are natural resources?
Q.3 Give three examples of natural and man-made material?
Q.4 What are the two kinds of natural resources? Explain giving examples?
Q.5 What are fossil fuels? Give three examples?
Q.6 Write three uses of coal?
Q.7 What is meant by carbonization?
Q.8 Write two uses of coke?
Q.9 Name four substances which are manufactured using products obtained from coal tar?
Q.10 How is petroleum formed?
Q.11 name three places in India where petroleum oil is found.
Q.12 What is petroleum refining?
Q.13 Write two uses of petrol, kerosene, diesel, paraffin wax and bitumen?
Q.14 Why is CNG being used as a fuel for vehicles?
Q.15 Explain why should we use fossil fuels only when absolutely necessary.
Q.16 What is the full form of LPG and CNG?
Q.17 What are the tips given by PCRA to save petrol and diesel?
Q.18 Why is petroleum called black gold?
Q.19 Give two advantages of natural gas as a fuel.
Q.20 Explain why coal, petrol and diesel oil will be exhausted one day.

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