Most Probable Questions For CSE Prelims 2019 | Geography | 12, February 2019 |
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1 Minute Challenge www.viharastudyhall.com
CIG IAS Academy
(Institute For Geography)
1 Minute Challenge www.viharastudyhall.com
Which one of the following Islands is of volcanic origin?
Reunion Island
Andaman & Nicobar Islands
Lakshadweep Islands
Maldives
With reference to ‘Ozone layer’, which of the following statements is/are not correct? 1. It is continuously being created and destroyed naturally. 2. It is formed in the atmosphere through photochemical reaction. 3. Controlling and phasing out ozone depleting substances is associated with Nagoya protocol. Which of the above statements are correct?
1 only
2 and 3 only
3 only
1, 2 and 3
Stalactites and stalagmites are features of
glacial topography
volcanic topography
karst topography
fluvial topography
Which one of the following can be used to predict the epicenter of earthquakes?
Large scale fluctuations of oil flow in oil wells
Increase in emission of radon gas
Seismic gap
None of the above
‘Polar Vortex’, sometimes seen in news, is
a threatened species in polar regions due to rapidly increasing global warming
largescale melting of polar ice caps
a gyre formed by cold oceanic currents in polar seas
an upper level low-pressure area lying near the Earth's pole
You got {number correct}/{number of questions} correct answers
1.Answer (a)
ExplanationThe Reunion Island is above a hotspot in the Earth's crust. The Piton de la Fournaise, a shield volcano on theeastern end of Réunion Island, rises more than 2,631 metres (8,632 ft) above sea level and is sometimes called asister to Hawaiian volcanoes because of the similarity of climate and volcanic nature. It has erupted more than 100times since 1640, most recently erupting on September 2016.The collision of Indo-Australian Plate with Eurasia lifted the Himalayas and most of the Indonesian islands, andcreated a long arc of highlands and islands, which includes the Arakan Yoma range of Burma, the Andaman andThe Nicobar Islands, and the islands off the west coast of Sumatra.Lakshadweep is an archipelago of twelve atolls (made of corals), three reefs and five submerged banks, with atotal of about thirty-nine islands and islets.The Maldives consists of 1,192 coral islands grouped in a double chain of 26 atolls.
2. Answer (c)
ExplanationThe creation and destruction of ozone gas is a gradual and continuous natural process. The oxygen moleculesare broken up or separated in the atmospheric layer between the altitudes of 80 to 100 km.Oxygen breaks up into two separate oxygen atoms.
O2→ O + O
These separated oxygen atoms (O) are combined with oxygen molecules (O2) and thus ozone (O3) is formed.
O2 + O→ O3 (ozone)
The ozone is transformed back into oxygen by a further collision of ozone with monoatomic oxygen.
Ozone (O3) + O →Oxygen (O2) + Oxygen (O2)
The process of the formation of ozone may be described as the production of ozone by the actions of ultravioletrays on ordinary oxygen atoms by the photochemical process which is responsible for the constanttransformation of oxygen to ozone and from ozone back to oxygen. Thus, the constant formation of productionand destruction of ozone is a natural process which maintains an approximate equilibrium level of ozone in theatmosphere if not inferred by human activities. The controlling and phasing out ozone-depleting substances isassociated with the Montreal protocol.
3. Answer (c)
ExplanationStalactites and stalagmites are depositional landforms created by groundwater. Typical landforms produced by theaction of groundwater through the processes of solution and deposition is called Karst topography
4. Answer (d)
ExplanationEarthquake prediction is concerned with forecasting the occurrence of an earthquake of a particular intensityover a specific locality within a specific time limit. However, no flawless technique has been developed toaccurately predict the earthquakes till date.
5. Answer (d)
ExplanationA polar vortex is an upper level low-pressure area lying near the Earth's pole. There are two polar vortices in theEarth's atmosphere, which overlie the North, and South Poles. Each polar vortex is a persistent, large-scale, lowpressure zone that rotates counter-clockwise at the North Pole (called a cyclone), and clockwise at the SouthPole. The bases of the two polar vortices are located in the middle and upper troposphere and extend into thestratosphere. Ozone depletion occurs within the polar vortices – particularly over the Southern Hemisphere –reaching a maximum depletion in the spring.
ExplanationThe Reunion Island is above a hotspot in the Earth's crust. The Piton de la Fournaise, a shield volcano on theeastern end of Réunion Island, rises more than 2,631 metres (8,632 ft) above sea level and is sometimes called asister to Hawaiian volcanoes because of the similarity of climate and volcanic nature. It has erupted more than 100times since 1640, most recently erupting on September 2016.The collision of Indo-Australian Plate with Eurasia lifted the Himalayas and most of the Indonesian islands, andcreated a long arc of highlands and islands, which includes the Arakan Yoma range of Burma, the Andaman andThe Nicobar Islands, and the islands off the west coast of Sumatra.Lakshadweep is an archipelago of twelve atolls (made of corals), three reefs and five submerged banks, with atotal of about thirty-nine islands and islets.The Maldives consists of 1,192 coral islands grouped in a double chain of 26 atolls.
2. Answer (c)
ExplanationThe creation and destruction of ozone gas is a gradual and continuous natural process. The oxygen moleculesare broken up or separated in the atmospheric layer between the altitudes of 80 to 100 km.Oxygen breaks up into two separate oxygen atoms.
O2→ O + O
These separated oxygen atoms (O) are combined with oxygen molecules (O2) and thus ozone (O3) is formed.
O2 + O→ O3 (ozone)
The ozone is transformed back into oxygen by a further collision of ozone with monoatomic oxygen.
Ozone (O3) + O →Oxygen (O2) + Oxygen (O2)
The process of the formation of ozone may be described as the production of ozone by the actions of ultravioletrays on ordinary oxygen atoms by the photochemical process which is responsible for the constanttransformation of oxygen to ozone and from ozone back to oxygen. Thus, the constant formation of productionand destruction of ozone is a natural process which maintains an approximate equilibrium level of ozone in theatmosphere if not inferred by human activities. The controlling and phasing out ozone-depleting substances isassociated with the Montreal protocol.
3. Answer (c)
ExplanationStalactites and stalagmites are depositional landforms created by groundwater. Typical landforms produced by theaction of groundwater through the processes of solution and deposition is called Karst topography
4. Answer (d)
ExplanationEarthquake prediction is concerned with forecasting the occurrence of an earthquake of a particular intensityover a specific locality within a specific time limit. However, no flawless technique has been developed toaccurately predict the earthquakes till date.
5. Answer (d)
ExplanationA polar vortex is an upper level low-pressure area lying near the Earth's pole. There are two polar vortices in theEarth's atmosphere, which overlie the North, and South Poles. Each polar vortex is a persistent, large-scale, lowpressure zone that rotates counter-clockwise at the North Pole (called a cyclone), and clockwise at the SouthPole. The bases of the two polar vortices are located in the middle and upper troposphere and extend into thestratosphere. Ozone depletion occurs within the polar vortices – particularly over the Southern Hemisphere –reaching a maximum depletion in the spring.