Geology Short Questions & Answers for Public Service Commission Examination

46 ____________ can be used in the preparation of artificial polarizer.

1 Quinine calcium sulphate

2 Lead sulphate

3 Mixture of lead and iodine

4 Quinine iodine sulphate

View Answer

Answer: Quinine iodine sulphate

47 The chemical composition of sillimanite is

1 Al2O3 Si02

2 AL203 Si02-2H20

3 A1203 2H20

4 A1203 -4H20

View Answer

Answer: Al2O3 Si02

Article and Schedule Quiz	Start Test!

DOWNLOAD CURRENT AFFAIRS PDF FROM APP

48 A biaxial mineral is positive if

1 X is acute bisectrix

2 Z is acute bisectrix

3 Y is acute bisectrix

4 Z is obtuse bisectrix

View Answer

Answer: Z is acute bisectrix

49 The highest interference colour is produced in a thin section which is

1 parallel to the optic axis

2 perpendicular to the optic axis

3 at an angle of 15° from the cleavage direction

4 at an angle of 45° from the vibration direction

View Answer

Answer: at an angle of 45° from the vibration direction

50 Which one of the following is a non-pleochroic mineral?

1 Biotite

2 Muscovite

3 Hypersthene

4 Garnet

View Answer

Answer: Muscovite

51 is mineralogically equivalent to granite.

1 Aplite

2 Gabbro

3 Dolerite

4 Syenite

View Answer

Answer: Aplite

52 is the volcanic equivalent of granodiorite.

1 Rhyolite

2 Dacite

3 Trachyte

4 Phonolite

View Answer

Answer: Dacite

53 Graphic texture is a product of crystallization at

1 tripple point

2 incongruent point

3 eutectic point

4 quadrotectic point

View Answer

Answer: eutectic point

54 Which of the following may not be of metamorphic origin?

1 Granite

2 Basalt

3 Trachyte

4 Gabbro

View Answer

Answer: Granite

55 Ophitic texture is commonly exhibited by

1 lamprophyre

2 dolerite

3 harzburgite

4 trachyte

View Answer

Answer: dolerite

56 Batholiths are always associated with

1 earthquake zones

2 orogenic belt

3 island arc

4 fold and faults

View Answer

Answer: orogenic belt

57 texture is absent in plutonic igneous rocks.

1 Holohyaline

2 Holocrystalline

3 Porphyritic

4 Granitic

View Answer

Answer: Holohyaline

58 Conglomerate with compositionally one type of pebble is called

1 polymictic conglomerate

2 oligomictic conglomerate

3 intraformational conglomerate

4 interformational conglomerate

View Answer

Answer: oligomictic conglomerate

59 Pudding stone is a synonymous term for

1 breccia

2 grit

3 khondalite

4 conglomerate

View Answer

Answer: conglomerate

60 is a light-coloured sandstone with at least 25% feldspar.

1 Orthoquartite

2 Arkose

3 Greywacke

4 Grit

View Answer

Answer: Arkose

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test	Start Test!
SSC MTS Mock Test	Start Test
IBPS CLERK MOCK TEST	Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH)	Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi)	Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH)	Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH)	Start Test!
IB Security Assistant Mock test 1 (english)	Start Test!
UP POLICE CONSTABLE MOCK TEST 1	Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI)	Start Test!