Question : Which of the following is an organic rock ?
Option 1: Marble
Option 2: Coal
Option 3: Granite
Option 4: Slate
Correct Answer: Coal
Solution : The correct answer is Coal.
Coal is formed by the process of carbonation in which organic material i.e. dead plants and trees are burnt deep inside the earth under high pressure and temperature for million of years. It can be considered as an organic rock. Because dead plants and trees are layered by sediments over a long period of time i.e. why coal deposits are usually found in sedimentary rocks. Slate, marble and granite are metamorphic rocks which are formed by the rearrangement of molecules and they are inorganic rocks.
Related Questions
Know More about
Staff Selection Commission Combined Grad ...
Result | Eligibility | Application | Selection Process | Preparation Tips | Admit Card | Answer Key
Get Updates Brochure
Your Staff Selection Commission Combined Graduate Level Exam brochure has been successfully mailed to your registered email id “”.
