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Minerals and Rocks Class 11 MCQs Questions with Answers
I. Choose the correct answer
Question 1.
What is the percentage of oxygen in the earth’s crust by weight?
(a) 46.60%
(b) 27.72%
(c) 8.13%
(d) 5.00%
Answer
Answer: (a) 46.60%.
Question 2.
What is the basic source of all minerals in the earth’s crust?
(a) upper surface
(b) magma
(c) crust
(d) none of them
Answer
Answer: (b) magma.
Question 3.
Which one is the most important component of Quartz?
(a) sand
(b) granite
(c) both of them
(d) none of them
Answer
Answer: (c) both of them.
Question 4.
Which one is not the component of pyroxenes?
(a) calcium
(b) magnesium
(c) iron
(d) granite
Answer
Answer: (d) granite.
Question 5.
Which are the major elements of Olivine?
(a) iron
(b) silica
(c) magnesium
(d) all of them
Answer
Answer: (d) all of them.
Question 6.
Which one is the metallic mineral?
(a) silica
(b) carbon
(c) oxygen
(d) gold
Answer
Answer: (d) gold.
Question 7.
Out of these which do not contain the metal content?
(a) sulphur
(b) nitrates
(c) phosphates
(d) all of them
Answer
Answer: (d) all of them.
Question 8.
The science of rocks is known as
(a) Geology
(b) Zoology
(c) Petrology
(d) none of them
Answer
Answer: (c) Petrology.
Question 9.
The rocks which are formed from solidified magma and lava are known as
(a) Sedimentary
(b) Igneous
(c) Sand rocks
(d) Metamorphic
Answer
Answer: (b) Igneous.
Question 10.
What kind of rocks are formed by the deposition/cementation of the fragments?
(a) Sedimentary
(b) Igneous
(c) Pegmatitic
(d) Metamorphic
Answer
Answer: (a) Sedimentary.
Question 11.
Which are the hoarse grained rocks with wide range of composition?
(a) Pegmatitic granite
(b) Pegmatitic diorite
(c) both of them
(d) none of them
Answer
Answer: (c) both of them.
Question 12.
Granite is a type of rock:
(a) Granetoid
(b) Pegmatitic
(c) Glassy
(d) Aphantic
Answer
Answer: (a) Granetoid.
Question 13.
Which one is the type of extrusive rock?
(a) Granetoid
(b) Glassy
(c) Fragmental
(d) Aphantic
Answer
Answer: (c) Fragmental
Question 14.
Deposition cementation of the fragments by external agencies is known as
(a) Sedimentation
(b) Metamorphism
(c) Lithification
(d) none of these
Answer
Answer: (a) Sedimentation.
Question 15.
Which kind of rocks are formed by the active participation of animals and plant secretions?
(a) Siliceous rocks
(b) Sand rocks
(c) Fragmental rocks
(d) Glassy rocks
Answer
Answer: (a) Siliceous rocks.
Question 16.
Which kind of rocks are formed by the compressed and altered vegetable matters containing large amount of carbon?
(a) Peat
(b) Sand rocks
(c) Fragment
(d) Glassy
Answer
Answer: (a) Peat.
Question 17.
What is formed by the deposition from concentrated solution of brines?
(a) Salts
(b) Peat
(c) Limestone
(d) Sand
Answer
Answer: (a) Salts.
Question 18.
Name the type of rocks in which original grains get rearranged into more or less perfect bands or layers.
(a) Salts
(b) Foliated
(c) Calcareous
(d) Granite
Answer
Answer: (b) Foliated.
Question 19.
Which one is the example of salt rock?
(a) Halite
(b) Gypsum
(c) Potash
(d) all of them
Answer
Answer: (d) all of them.
Question 20.
When rocks are forced down to lower levels by tectonic processes, the process is known as
(a) Sedimentation
(b) Metamorphism
(c) none of them
(d) both of them
Answer
Answer: (b) Metamorphism.
Question 21.
Metamorphic rocks are classified in…………. major groups.
(a) two
(b) three
(c) five
(d) six
Answer
Answer: (a) two.
Question 22.
Which group belongs to metamorphic rocks?
(fl) Foliated
(b) Non-foliated
(c) both of them
(d) none of them
Answer
Answer: (c) both of them.
Question 23.
Salts and phyllites are……………. rocks.
(a) Foliated
(b) Non-foliated
(c) none of them
(d) both of them
Answer
Answer: (a) Foliated.
Question 24.
Which one is the example of Non-foliated rocks?
(a) Marble
(b) Schists
(c) Salts
(d) Phyllites
Answer
Answer: (a) Marble.
Question 25.
Serpentine is a type of rocks.
(a) Foliated
(b) Non-foliated
(c) Salts
(d) Aphantic
Answer
Answer: (b) Non-foliated.
Question 26.
The process through which the rocks are transformed into new ones is known as?
(a) Rock cycle
(b) Metamorphism
(c) Sedimentation
(d) none of them
Answer
Answer: (a) Rock cycle.
II. Fill up the blanks with suitable words
Question 1.
India is the first among the world countries which produce …………….
Answer
Answer: mica
Question 2.
Main poducers of mica are …………, …………….. and Rajasthan.
Answer
Answer: Bihar, Andhra Pradesh
Question 3.
…………… is used in fertiliser, cement and sulphuric acid industries.
Answer
Answer: Gypsum
Question 4.
The basic source of all minerals is the ……………. in the interior of the earth.
Answer
Answer: hot magma
Question 5.
Aluminium, calcium, silica, iron, magnesium are the major elements of ……………..
Answer
Answer: amphiboles
Question 6.
………….., ……………. and …………….. are examples of non metals.
Answer
Answer: Sulphur, phosphates, nitrates
Question 7.
………….. solidified from magma and lava.
Answer
Answer: Igneous rocks
Question 8.
Granetoid or phaneretic rocks are ……………. in origin.
Answer
Answer: plutonic
Question 9.
Fragmental are mainly ……………. rocks.
Answer
Answer: extrusive
Question 10.
………….. is basically composed of remains of micro-organisms of …………….
Answer
Answer: Chalk, foraminera
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