NCERT Solutions for Class 8 Science Chapter 5 Materials Coal .
WEBOct 4, 2019 · This slow process of conversion of wood into coal is called carbonisation. Question 4. Fill in the blanks. (a) Fossils fuels are ____, ____ and ____ ... Petroleum gas is obtained during fractional distillation of petroleum. Question 5. Draw diagram to show petroleum and natural gas deposit. Answer: Question 6.