Question : Which of the following is an organic rock ?
Option 1: Marble
Option 2: Coal
Option 3: Granite
Option 4: Slate
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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.
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Question : Which one of the following is igneous rock ?
Option 1: limestone
Option 2: granite
Option 3: marble
Option 4: slate
Question : Which of the following statements is incorrect about granite?
Option 1: Granite is the most abundant rock in the continental crust
Option 2: It is the most common sedimentary rock
Option 3: These are igneous rocks that form when hot, molten rock crystallizes and solidifies
Option 4: Granite is composed mainly of quartz and feldspar with minor amounts of mica
Question : Which one of the following is a Sedimentary Rock ?
Option 1: Granite
Option 2: Charnockite
Option 3: Basalt
Option 4: Arkose
Question : When Granite rocks get metamorphosed, they form
Option 1:
Option 2:
Option 3:
Option 4:
Question : Which of the following rocks is formed by the cooling and crystallisation of magma?
Option 2: Chalk
Option 3: Coal
Option 4: Shell
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