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(a) Sumatra
(b) Sulawesi
(c) Java
(d) Kalimantan
ANSWER : (c) Java is part of the Sunda Island Arc, which includes Sumatra to the Northwest and Bali to the east. Rest three given places are touched by equator.
2. Which one of the following sedimentary rocks is organically formed? [NDA 2019-II]
(a) Shale
(b) Chert
(c) Halite
(d) Chalk
ANSWER : (d) Chalk is a variety of limestone composed mainly of calcium carbonate derived from the shells of tiny marine animals known as foraminifera and from the calcareous remains of marine algae known as coccoliths. Chalk forms from a fine-grained marine sediment known as ooze which are organic debris.
3. In which one of the following folds is the axial plane found to be virtually horizontal? [NDA 2019-II]
(a) Isoclinal
(b) Anticlinal
(c) Recumbent
(d) Monoclinal
ANSWER : (c) A recumbent fold is one in which the axial plane is essentially horizontal, with the limit of variation of axial planar dip, and the resulting limit of plunge, being 10°. It is a sideways-closing neutral structure that is neither a synformal nor an antiformal fold.
4. The normal lapse rate of temperature of Earth’s atmosphere drops to 0°C at the [NDA 2019-II]
(a) upper part of ionosphere.
(b) upper boundary of the tropopause.
(c) lower part of mesosphere.
(d) upper boundary of stratopause.
ANSWER : (d) The lapse rate is the rate at which an atmospheric variable, normally temperature in Earth’s atmosphere, changes with altitude. Lapse rate arises from the word lapse, in the sense of a gradual change. It corresponds to the vertical component of the spatial gradient of temperature.
5. Stalactite, stalagmite and pillars are the depositional landforms of [NDA 2019-II]
(a) running water.
(b) wind.
(c) glacier.
(d) underground water.
ANSWER : (d) Stalactite and a stalagmite grown together. It is rather common that stalactites and stalagmites meet and join. But as they grow very slowly it takes hundred thousands of years. After they met they are called a pillar. Stalactites, Stalagmites and Pillars are the most spectacular underground features, found in the limestone caves.
6. A deep valley characterized by steep step-like slope is known as [NDA 2019-II]
(a) U-shaped valley.
(b) Blind valley.
(c) Gorge.
(d) Canyon.
ANSWER : (a) A deep valley characterised by steep step-like side slopes is known as U-shaped valley.
7. Which one of the following is a major plate? [NDA 2019-II]
(a) Pacific plate
(b) Cocos plate
(c) Arabian plate
(d) Philippine plate
ANSWER : (a) Pacific major plate is the largest which underlies the Pacific Ocean. Specifically, it stretches all the way along the west coast of North America to the east coast of Japan and Indonesia.
8. The rivers of North-West Europe are good examples of [NDA 2019-II]
(a) parallel pattern of drainage.
(b) radial pattern of drainage.
(c) barbed pattern of drainage.
(d) trellis pattern of drainage.
ANSWER : (c) The rivers of North-western Europe show barbed pattern of drainage.
9. Which one of the following ocean currents is a cold current? [NDA 2019-II]
(a) South Atlantic Drift
(b) Mozambique Current
(c) East Australian Current
(d) Caribbean Current.
ANSWER : (a) South Atlantic drift is a cold water current and is formed from the eastward continuation of the Brazil Current.
10. Which one of the following hypothesis/theory explains the origin of the universe? [NDA 2019-II]
(a) Nebular hypothesis
(b) Binary theory
(c) Big Band theory
(d) Planetesimal hypothesis
ANSWER : (c) Big bang theory explains the origin of universe.
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