i. Impurities of sand and soil in ore are called ………….. . ii. Coal mainly contains ………….. .

Question

Fill in the blanks:

i. Impurities of sand and soil in ore are called ………….. .

ii. Coal mainly contains ………….. .

iii. Petroleum is formed from ………….. .

iv. Separation of various fractions of petroleum is called ………….. .

v. We can obtain minerals from rocks by ………….. .

Answer 1

i. Gangue

ii. carbon

iii. organisms in sea

iv. Refining

v. mining