NCERT Solutions for Chapter: Coal and Petroleum, Exercise 4: LONG ANSWER QUESTIONS
NCERT Science Solutions for Exercise - NCERT Solutions for Chapter: Coal and Petroleum, Exercise 4: LONG ANSWER QUESTIONS
Attempt the practice questions on Chapter 5: Coal and Petroleum, Exercise 4: LONG ANSWER QUESTIONS with hints and solutions to strengthen your understanding. NCERT Exemplar Science - Class 8 solutions are prepared by Experienced Embibe Experts.
Questions from NCERT Solutions for Chapter: Coal and Petroleum, Exercise 4: LONG ANSWER QUESTIONS with Hints & Solutions
We read in newspapers that burning of fuels is a major cause of global warming. Explain why.
While driving what are the tips we must follow to save petrol/diesel/natural gas?
Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible.? If yes, why?, If not, why not?
Why petrol is exhaustible natural resource, whereas sunlight is not? Explain.
Write some important uses of the various constituents of petroleum.
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?
What steps would you suggest for the judicious use of fossil fuels?
Complete the crossword Fig. 5.2 with the help of the clues:
Across
1. Fuels obtained from dead remains of living organisms. (6,5)
2. A process by which the various constituents of petroleum are separated. (8)
3. A porous black substance obtained from coal. (4)
4. Another name for motor fuel. (6)
Down
5. The substance obtained by carbonisation. (4)
6. Fuel for heavy motor vehicles. (6)
7. A petroleum product used for road surfacing. (7)
8. Dead remains of sea animals got converted into it. (9)
