67. Which of the following is not a natural source of hydrocarbon? A.Natural Gas B.Coal C.Petroleum D.Mica
Answer: Option D Solution: There are three main natural sources of hydrocarbons: natural gas, petroleum and coal. Mica is a natural occurring mineral that is based on a collection of silicate minerals and composed of varying amounts of potassium, iron, aluminum, magnesium and water. It is widely used in the electrical industry.
