Subject: Science, asked on 3/2/18

Subject: Science, asked on 31/10/17

Pls answer all questions

Q6. What is coke ? How is it obtained ?
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Q7. Differentiate between exhaustible and inexhaustible natural resources.
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Q8. What is natural gas?
        Why is it called a clean fuel ?
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Q9. Anthracite is considered the best variety of coal. Explain.
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Q10. Why are coal and petroleum called fossil fuels ?
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Shot - Answer Questions (Type II) : Answer in about 30- 40 words.
1. What is meant by " Energy Crisis" ? 
    How can it be prevented ?
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