Question

choose the option
4. The main constituent of coal is (a) carbon (c) nitrogen 5. Among other things, a good fuel should have a (a) high calorific value (c) high temperature (b) hydrogen (d) oxygen (b) low calorific value (d) low temperature​

Answer 1

Answer:

4.b

5 d

Explanation:

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Answer 2

Answer:

4,carbon,5.high calorific value