Geology Online Free MCQ Paper
Geology Model Test Paper
Q.1: Which one is a pure natural glass of granitic composition:
(a) Rhyolite.
(b) Pitchstone.
(c) Obsidian.
(d) None of these.
Answer. (c)
Q.2: Match the following:
I ll
1. a - Quartz i) Above 1470° C temp.
2.
3. Trydimite iii) Between 573°C temp.
4. Cristobalite iv) Below 573°C temp.
a) 1-ii, 2-iv, 3-i, 4-iii.
b) 1-i, 2-ii, 3-iii, 4-iv.
c) 1-iv, 2-iii, 3-ii, 4-i.
d) 1-iii, 2-i, 3-iv, 4-ii.
Answer. (c)
Q.3: Match the following:
I II
1. Amethyst i) Pale yellow
2. Citrin ii) Black quartz
3. Morion iii) Voilet
4. Cat’s eye iv) Fibrous variety of quartz.
a) 1-iv, 2-ii, 3-iii, 4-i.
b) 1-iii, 2-i, 3-ii, 4-iv.
C) 1-i, 2-ii, 3-iii, 4-iv.
d) 1-ii, 2- iv, 3-i, 4-iii.
Answer. (b)
Q.4: Trondhjemite is a:
(a) Quartz diorite.
(b) Quartz dumite.
(c) Plagioclase granite.
(d) Felspar diorite.
Answer. (a)
Q.5: Melting point of Quartz is about:
a) 870°C
b) 573°C
c) 1 728°C
d) 1470°C
Answer. (c)
Q.6: Plutonic lgneous rocks are formed under:
(a) Deep seated and moderate temp-pressure conditions.
(b) Near the earth’s surface and high temperature pressure conditions.
(c) Deep seated high temperature pressure and fast cooling conditions.
(d) Deep seated, high temperature pressure and slow cooling conditions.
Answer. (d)
Q.7 :The Inversion temperature between crystobalite and tridymite is:
a) 1380°C
b) 1490°C
c) 1470°C
d) 1540°c
Answer. (c)
Q.8: The loss of volatile substances from lava causes:
(a) A rapid increase in viscosity.
(b) A rapid decrease in viscosity.
(c) No change in viscosity.
(d) None of these.
Answer. (a)
Q.9: Amphiboles are:
a) Hydrous ferro - magnesian silicates
b) Ferro – magnesian siIicates
c) Potassium - aluminium silicates
d) Hydrated alumio silicates
Answer. (a)
Q.10: Which one is not a discordant igneous body:
(a) Dyke.
(b) Sill.
(c) Batholith.
(d) Phuton
Answer. (b)
Q.11: Match the following:
I II
1. Batholith. i. Funnel-shaped circular outcrop.
2. Ethmolith. ii. Largest intrusive body
3. Harpolith. iii. Any irregular intrusive body.
4. Chonolith iv. Sickle-shaped basic body.
(a) 1-iii, 2-ii, 3-i, 4-iv.
(b) 1-ii, 2-i, 3-iv, 4-iii.
(c) 1-ii, 2-i, 3-iii, 4-iv.
(d) 1-i, 2-ii, 3-iii, 4- iv.
Answer. (b)
Q12: Match the following:
I II
1) Amosite i) Fibrous serpentine
2) Actinolite ii) Asbestos
3) Crocidolite iii) Fibrous antho phyllite
4) Chrysolite iv) Fibrous riebeckite
a) 1-iii, 2-ii, 3-iv, 4-i.
b) 1-ii, 2-iii, 3-i, 4-iv.
c) 1-iv, 2-ii, 3-i, 4-iii.
d) 1-i, 2-ii, 3-iii, 4-iv.
Answer. (a)
Q.13: Pahoehoe structure is related to:
a) Block lava.
b) Ropy lava.
c) Pillow structure.
d) Lava-drain tunnel. .
Answer. (b)
Q.14: Chromium bearing mica is known as:
a) Sericite
b) Fuschsite
c) Damourite
d) Lepidomelane
Answer. (b)
Q.15: Basaltic lavas can flow to greater distances because of:
a) High viscosity.
b) Low viscosity.
c) High temperature.
d) Low temperature.
Answer. (b)
Q.16: Myrmekite structure is produced by intergrowth of:
a) Quartz and plagioclase.
b) Quartz and orthoclase.
c) Plagioclase and Angite.
d) Albite and oligoclase.
Answer. (a)
Q.17. Cations from soil moisture are attracted to the surface of clay minerals to:
a) Balance the unsatisfied valence bonds.
b) Balance the negative electrical charge
c) Form diffuse - double layer
d) Replace the low valence bonds
Answer. (b)
Q.18. Cations from soil moisture are attracted to the surface of clay minerals to:
a) Balance the unsatisfied valence bonds.
b) Balance the negative electrical charge
c) Form diffuse - double layer
d) Replace the low valence bonds
Answer. (b)
Q.19: Batholiths are generally associated with:
(a) Island arcs.
(b) Folded structures.
(C) Orogenic belts.
(d). Earthquake zones.
Answer. (c)
Q.20: The process of conversion of glassy material to crystallised material is known as:
(a) Crystallisation.
(b) Devitrification.
(c) Eutectic process.
(d) Assimilation.
Answer. (b)
Q.21: Among the following clay minerals, which mineral expands much more in presence of
Water:
a) Kaolinite
b) Iolite
c) Montmorillonite
d) Halloysite.
Answer. (c)
Q.22: What is the evidence of devitrification:
(a) Corona structure.
(b) Orbicular structure.
(c) Perlitic.
(d) Percussion figure.
Answer. (c)
Q.23: Sagenitic texture is shown by:
(a) Rutile.
(b) llmemite.
(C) Ijolite.
(d) Microcline.
Answer. (a)
Q.24: Bentonite is believed to result from the:
a) Weathering of granites.
b) Decomposition of syenite
c) Decomposition of volcanic ash.
d) Decomposition of Fe-bearing rocks.
Answer. (c)
Q.25: Dravite is:
a) Ca - pyroxene
b) Mg - Tourmaline
c) Fe - Tourmaline .
d) Mg – Angite
Answer. (b)
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