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Coal

Why is coal s...

Question

Why is coal said to be black diamond?

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Solution

Coal is said to be a black diamond because it is used for a variety of purposes. It is used as fuel in the kitchen and as a raw material in industries. Coal is also used in the generation of electricity.

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Q. Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable source of energy whereas wood is a renewable source of energy?

Coal reserves are said to be enough to last for another hundred years. Do
you think we need to worry in such case? Why or why not?

Q. Statements: All coals are diamonds.
All diamonds are graphite.
No graphite is carbon.
Conclusions: I. No coal is carbon.
II. No diamond is carbon.

Q. Question 34
Coal reserves are said to be enough to last for another hundred years. Do you think we need to worry in such case? Why or why not?

How can 3 completely different looking substances be carbon,that is, Diamond, graphite and Coal?

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