IAS Civil servcies Geology (Earth Science) Sample Paper
MCQ Paper for IAS UPSC Geology examination
Q.1: Choose the odd one out:
a) Leucite
b) Nepheline
c) Scapolite
d) Nosean
Answer. (c)
Q.2: Which is cubic Zeolite:
a) Natrolite
b) Analcite
c) Stilbite
d) Phillipsite
Answer. (b)
Q.3: Sapphire is a blue transparent variety of:
a) Diamond
b) Quartz
c) Topaz
d) Corundum
Answer. (d)
Q.4: Rutile is characterized by:
a) Its brow - red colour
b) Its acicular form
c) Its geniculate twinning
d) Its hardness.
Answer. (c)
Q. 5: Millerite is sulphide of:
a) Copper
b) Silver
c) Cobalt
d) Nickel
Answer. (d)
Q.6: The minerals marialite and meionite belong to:
a) Zeolite family
b) Scapolite family
c) Feldsphathoid family
d) Melilite family
Answer. (b)
Q.7: Mark the correct statement regarding Electrum:
a) lt is a electrical process
b) lt is a process of electrons separation
c) lt is a mineral containing copper and silver
d) It is gold containing more than 20% silver
Answer. (d)
Q.8: Which metal can be obtained from Anatase and Brookite:
a) Aluminium
b) lron
c) Titanium
d) Strontium
Answer. (c)
Q.9: Sphalerite has…parallel to the faces of rhombic dodecahedron
a) 2 sets of cleavage.
b) 3 sets of cleavage.
c) 4 sets of cleavage.
d) 6 sets of cleavage.
Answer. (d)
Q.10: Which of the following minerals belongs to the aluminium silicated group:
(a) Andradite
(b) Sillimanite
(c) Pigeonite
(d) Wollastonite
Answer. (b)
Q.11: Orthoclase is distinguished from Quartz in thin section by:
(a) Low refractive index.
(b) Type of twinning.
(c) Negative sign.
(d) All the above.
Answer. (d)
Q.12: A crescent-shaped dune with two tapering arms is known as:
(a) Moraine.
(b) Barchans
(c) Parabolic dunes.
(d) Drumlins.
Answer. (b)
Q.13: The space between the dunes is known as:
(a) Oasis.
(b) Gasses.
(c) Col.
(d) Wadies.
Answer. (b)
Q.14: Orthoclase shows:
(a) Low birefringence.
(b) Optically negative.
(C) High refractive index.
(d) Both (a) and (b)
Answer. (d)
Q.15: The Michael-Levy method is used to determine the extinction angle of:
(a) Hornblende.
(b) Quartz.
(C) Plagioclare.
(d) Hypersthene.
Answer. (c)
Q.16: Mark the correct statement regarding olivine:
(a) High refractive index.
(b) Strong birefringence.
(c) Straight extinction.
(d) All the above.
Answer. (d)
Q.17: The Orthopyroxenes show interference colour of:
(a)1st order.
(b) 2nd order.
(c) 3rd order.
(d) 2nd and 3rd orders.
Answer. (a)
Q.18: Nepheline is distinguished from Quartz by it’s:
(a) Positive sign only.
(b) Negative sign and lower birefringence.
(C) Negative sign and higher birefringence.
(d) Higher birefringence only.
Answer. (b)
Q.19: Which type of extinction is often shown by Quartz mineral?
(a) Straight.
(B)Oblique.
(c) Symmetrical.
(d) Wavy.
Answer. (d)
Q.20: The Zeolite are characterised in thin section by:
(a) A refractive index lower than Canada balsam and the high birefringence.
(B) A refractive index higher than Canada balsam and the low birefringence.
(c) A refractive index lower than Canada balsam and low birefringence.
(d) A refractive index higher than Canada balsam and high birefringence.
Answer. (c)
Q.21: X-ray methods of the study of minerals are based on.... of the x-rays:
(a) Emission-spectral analysis.
(b) Thermal analysis.
(c) Diffraction analysis.
(d) None of these.
Answer: (c)
Q.22: Which plate is generally used to determine the optical sign of Plagioclare?
(a) Quartz plate.
(b) Syenite plate.
(C) Mica plate.
(d) Bedeck compensator.
Answer. (b)
Q.23: ln Hypersthene, a well-marked Pleochroism which shows:
(a) X-pink, Y-green and Z-yellow.
(b) X-pink, Y-yellow and Z- green.
(c) X-yellow, Y-pink and Z-green.
(d) X-green, Y- yellow and Z-pink.
Answer. (b)
Q.24: Enstatite is distinguished from Hypersthene ln thin section by :
(a) Extinction angle.
(b) Lack of Pleochroism.
(c) Presence of Pleochroism.
(d) High refractive index.
Answer. (b)
Q.25: The birefringence in Quartz is:
(a) 0.08
(b) 0.09
(c) 0.009.
(d) 0.01.
Answer. (c)
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