Geology Objective Sample Paper
Solved Test Paper Geology
(a) Higher viscosity.
(b) Lower viscosity.
(c) More ion concentration.
(d) None of these.
Answer. (b)
Q.2: In felspars the cleavage planes are parallel to:
a) (100) face and (010) face.
b) (001) face and (010) face.
c) (010) face and (010) face.
d) Cleavage is absent.
Answer. (b)
Q.3: Calc-alkaline plutonic rocks are chiefly composed of:
(a) Felspars and pyroxenes.
(b) Felspars and micas.
(c) Quartz and pyroxenes.
(d) Felspar and Quartz.
Answer. (d)
Q.4: Amazon stone is a:
a) Bright green microcline
b) Gem variety or albite
c) Pink albite
d) Twinned orthoclare.
Answer. (a)
Q.5: When the groundmass is glassy in a porphyritic texture, it is called:
(a) Poikilitic texture.
(b) Orthophyric texture.
(c) Vitrophyric texture.
(d) Felsophyric texture.
Answer. (c)
Q.6: Jungel metavolcanic suite (central India) predominantly known for:
(a) Acidic basalt.
(b) Alkali basalt.
(c) Platean basalt.
(d) Tholiitic basalt
Answer. (b)
Q.7: Quartz mineral belongs to:
a) Sorosilicates.
b) InosiIicates.
c) Cyclosilicates.
d) Tektosilicates.
Answer. (d)
Q.8: Alteration of volcanic rocks come about more or less automatically, the
alteration is called:
(a) Propylitic alteration.
(b) Hydrothermal alteration.
(c) Deuteric alteration.
(d) None of the above.
Answer. (c)
Q.9: Match the columns:
I
1. Panidiomorphic.
2. Hypidiomorphic.
3. Allotriomorphic. .
4. Glassy
II
i.Crystals subhedral. _
ii. Crystals are anhedral.
iii. Crystals are euhedral.
iv. No crystallisation at all.
(a) 1-ii, 2-iii, 3-i, 4-iv.
(b) 1-i, 2-ii, 3-iii, 4-iv.
(c) 1-iv, 2-iii, 3-ii, 4-i.
(d) 1-iii, 2-i, 3-ii, 4- iv.
Answer. (d)
Q10: Which is not the non-Crystalline variety of silica:
a) Cristobalite
b) Lecha telierite
c) Opal
d) Chalcedony
Answer. (a)
Q11: A common decomposition in basaltic rocks involve:
(a) Oxidation of Mg.
(b) Oxidation of Fe.
(c) Hydration of Fe.
(d) Hydration of K.
Answer. (b)
Q.12: Aplite is a:
a) Fine-grained, unequigranular rock.
b) Fine-grained, equigranular, paniodiomorphic form of a plutonic rocks.
c) Fine-grained, equigranular, allotriomorphic form of a plutonic rock.
d) Volcanic rock.
Answer. (c)
Q.13: Diatomite is a variety of:
a) Agate
b) Opal
c) Flint
d) Chert
Answer. (b)
Q14: Most of the mountain ranges of past geological times, show cores of:
(a) Granitic types.
(b) Granodioritic types.
(c) Dioritic types.
(d) Basaltic types.
Answer. (b)
Q.15: Anorthosite dominantly composed of:
(a) Oligoclase felspar.
(b) Anorthoclase felspar.
(C) Labrodorite felspar.
(d) Orthoclase felspar.
Answer. (c)
Q.16: "Alexandrite" is:
a) Magnesium Oxide
b) Beryllium aluminium Oxide
c) Mercury chloride
d) Titanium dioxide.
Answer. (b)
Q.17: Lamprophyres generally occur as:
(a) Batholiths.
(b) Dykes and sills.
(c) Plutons.
(d) Laccolith.
Answer. (b)
Q.18: Leucite differs in compositon from orthoclase in having a:
a) Lower ratio of silica to alumina
b) Higher ratio of silica to alumina.
c) Both silica and alumina are equal.
d) None of the above.
Answer. (a)
Q.19: What coarse-grained (plutonic) rock consists of abundant calcic plagioclase
pyroxene and ollvine:
(a) Syenit.
(b) Lamprophyre
(c) Peridotite.
(d) Gabbro.
Answer. (d)
Q.20: Rock containing enstatite and hypersthene along with plagioclases is called:
(a) Anorthosite.
(b) Monzonite.
(c) Norite
(d) Lamprophyre.
Answer. (c)
Q.21: Which polymorph of silica is found in deep interior of the Earth:
a) Citrin
b) Morain
c) Cairugorm.
d) Stishovite
Answer. (d)
Q.22: Syenite with alkali feldspar and plagioclase in almost equal amount is called:
(a) Norite.
(b) Kimberlite.
(c) Peridotite.
(d) Monozonite.
Answer. (d)
Q.23: Choose the odd one out:
a) Leucite
b) Nepheline
c) Scapolite
d) Nosean
Answer. (c)
Q.24: Name the coarse-grained (plutonic) rock consisting primarilly of sodic plagioclase and
hornblende:
(a) Syenite.
(b) Diorite.
(c) Gabbro.
(d) Granite.
Answer. (b)
Q.25: Dark - coloured variety of Nepheline is known as:
a) Eleolite
b) Cancrinite
C) Hauyne
d) Lazurite
Answer. (a)
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