Static Quiz 07 June 2022
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Static Quiz 07 June 2022 for UPSC Prelims
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- Question 1 of 5
1. Question
Consider the following statements regarding sedimentary rocks
1.In many sedimentary rocks, the layers of deposits retain their characteristics even after lithification.
2. Lithification is the process by which deposits through compaction turn into rocks.
Choose correct statements from the following codesCorrectAns;- c) Both 1 and 2
Explanation;-
• In many sedimentary rocks, the layers of deposits retain their characteristics even after lithification.
• Hence, we see a number of layers of varying thickness in sedimentary rocks like sandstone, shale etc.IncorrectAns;- c) Both 1 and 2
Explanation;-
• In many sedimentary rocks, the layers of deposits retain their characteristics even after lithification.
• Hence, we see a number of layers of varying thickness in sedimentary rocks like sandstone, shale etc. - Question 2 of 5
2. Question
Which of the following is the most common type of chemical sedimentary rock.
CorrectAns;- a) Limestone
Explanation;-
• The most common chemical sedimentary rock, by far, is limestone.
• Others include chert, banded iron formation, and a variety of rocks that form when bodies of water evaporate.
• The Biological processes are important in the formation of some chemical sedimentary rocks, especially limestone and chert.
IncorrectAns;- a) Limestone
Explanation;-
• The most common chemical sedimentary rock, by far, is limestone.
• Others include chert, banded iron formation, and a variety of rocks that form when bodies of water evaporate.
• The Biological processes are important in the formation of some chemical sedimentary rocks, especially limestone and chert.
- Question 3 of 5
3. Question
With reference to metamorphism, which of the following is/are correct?
1. Metamorphism occurs when rocks are forced down to lower levels by tectonic processes
2. When molten magma rising through the crust comes in contact with the crustal rocks
3. When the underlying rocks are subjected to great amounts of pressure by overlying rocks.
Choose correct statements from the following codesCorrectAns;- d) All of the above
Explanation;-
• The Metamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganization of materials within original rocks.IncorrectAns;- d) All of the above
Explanation;-
• The Metamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganization of materials within original rocks. - Question 4 of 5
4. Question
What is the major change that occurs during metamorphism of limestone to marble?
CorrectAns;- a) Calcite grains recrystallize to larger and interlocked grains
Explanation;-
• The Marble is a metamorphic rock formed by the alteration of limestone by heat and pressure.
• The calcite in the limestone changes and fossils and layering in the original limestone disappear as interlocking grains grow.
• If the limestone is pure, a white marble is formed.
IncorrectAns;- a) Calcite grains recrystallize to larger and interlocked grains
Explanation;-
• The Marble is a metamorphic rock formed by the alteration of limestone by heat and pressure.
• The calcite in the limestone changes and fossils and layering in the original limestone disappear as interlocking grains grow.
• If the limestone is pure, a white marble is formed.
- Question 5 of 5
5. Question
Consider the following statements and identify the incorrect statement
CorrectAns;- b) The Metamorphic rocks are not stratified.
Explanation:-
• The Sometimes minerals or materials of different groups are arranged into alternating thin to thick layers appearing in light and dark shades.
• Such a structure in metamorphic rocks is called banding and rocks displaying banding are called banded rocks.IncorrectAns;- b) The Metamorphic rocks are not stratified.
Explanation:-
• The Sometimes minerals or materials of different groups are arranged into alternating thin to thick layers appearing in light and dark shades.
• Such a structure in metamorphic rocks is called banding and rocks displaying banding are called banded rocks.