Q140
Coal is formed from
A.
Crude oil
B.
Deposit of animal waste
C.
Coke
D.
Compressed and hardened biomass
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulphur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years.