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Taking a maximum number of tests helps you to keep up your question-solving abilities. You will get an overall idea about the type of questions, approximate time needed for solving different types of questions, etc., which makes you fully prepared and confident to face the final exam. You will also know your strong and weak areas by solving more and more question papers. These tests will benefit you in building a positive attitude and combating nervousness, which will ultimately help you get an “Yes, I can do it” outlook.
let's do some questions
21. Which one of the following countries does NOT have direct access to the sea/ocean? [NDA 2020-I]
(a) Syria
(b) Jordan
(c) Azerbaijan
(d) Armenia
21. (d) Asia has 12 landlocked countries: Afghanistan, Armenia, Azerbaijan, Bhutan, Laos, Kazakhstan, Kyrgyzstan, Mongolia, Nepal, Tajikistan, Turkmenistan, and Uzbekistan. Syria is located in Western Asia, north of the Arabian Peninsula, at the eastern end of the Mediterranean Sea. Jordan is almost entirely land-locked and only has a small (27 km) marine coast to the Red Sea, cantered on the port of Aqaba. Azerbaijan has a coastline of 713 km on the Caspian Sea.
22. Which one of the following is NOT a reason of decrease in biodiversity ? [NDA 2020-I]
(a) Large scale deforestation
(b) Exploitation of forest produce
(c) Maintaining sacred groves
(d) Encroachment in forest areas
22. (c) The main cause of the loss of biodiversity can be attributed to the influence of human beings on the world's ecosystem, In fact human beings have deeply altered the environment, and have modified the territory, exploiting the species directly, for example by fishing and hunting, changing the biogeochemical cycles and transferring species from one area to another of the Planet. Alteration and loss of the habitats; Pollution; Climate change and Overexploitation of resources are main threats of environment.
23. Which one of the following is NOT a cause of depletion in groundwater? [NDA 2020-I]
(a) Afforestation
(b) Loss of forests
(c) Excessive pumping of groundwater
(d) Construction of large scale concrete buildings
23. (a) The two main causes of Depletion of Water Table are Deforestation and Over-pumping of groundwater. Constructions of large scale concrete buildings are also one of the causes of Depletion of Water.
24. Keppel Island is completely bleached mainly due to the expansion of [NDA 2021-I]
(a) Starfish.
(b) Blue whale.
(c) Octopus.
(d) Sea horse.
24. (a)
• Coral bleaching in Keppel Bay
• In the shallow waters of Keppel Bay, coral bleaching on a mass scale is infrequent and recovery is usually fast.
• Coral bleaching occurs when warmer than usual water combines with high levels of sunlight causing the coral to expel the algae that live in its tissues.
• Without the algae, known as ‘zooxanthellae’, the coral loses its energy source and its colour
• Keppel reefs can recover rapidly from bleaching because of the excellent growth rates of branching species
• After the 2002 bleaching episode, coral cover increased rapidly, reaching the highest coral cover ever documented in 2004
25. Which one of the following is not a minor plate ? [NDA 2021-I]
(a) Cocos Plate
(b) Nazca Plate
(c) Caroline Plate
(d) Antarctic Plate
25. (d) The Antarctic Plate is a tectonic plate containing the continent of Antarctica, the Kerguelen Plateau and extending outward under the surrounding oceans. It is the Earth’s fifth-largest plate. The Antarctic Plate’s movement is estimated to be at least 1 cm (0.4 in) per year towards the Atlantic Ocean .
26. Advantage(s) of tectonic activity in Iceland include(s) : [NDA 2021-I]
1. Source of natural geothermal energy
2. Creation of new land
3. Attraction of tourists
Select the correct answer using the code given below :
(a) l only
(b) 2 and 3 only
(c) l and 3 only
(d) 1, 2 and 3
26. (c) Volcanoes are some productive forces like onriching the soils and creating new and masses.
• Icelanders have also reaped the benefits in the form of vast resources of geothermal energy. Over 90% of housing in Iceland is heated by natural geothermal
heat - one of the cheapest and cleanest forms of energy in existence.
• Hot springs can be found almost everywhere, and the melt water created by sub-glacial volcanoes provides the country with a potential source of hydroelectric power.
• All this clean energy has made Iceland one of the least polluted countries in the world.
27. The process whereby certain minerals absorb water, expand and change is called as [NDA 2021-I]
(a) Hydration.
(b) Oxidation.
(c) Hydrolysis.
(d) Carbonation.
27. (a)
• Hydration is the process whereby certain minerals absorb water, expand and change.
• A hygroscopic substance is able to absorb or adsorb water from its surroundings. Typically, this occurs at or near ordinary room temperature. Most hygroscopic materials are salts, but many other materials display the propery.
28. Which one of the following is the longest Latitude ? [NDA 2021-I]
(a) 90 degree Latitude
(b) 23.5 degree Latitude
(c) 0-0 degree Latitude
(d) 66.5 degree Latitude
28. (c) The longest latitudes is quater, whose latitudes is zero, while at the pole at latitude 90° north and 90° sourth (or – 90°) the circles shrinks to point.
29. Consider the following statements about the Mahanavami Dibba : [NDA 2021-I]
1. It was the name of a giant box of sweets distributed at the Mahanavami festival.
2. It was the name of a massive platform with a base covered with relief carvings.
Which of the statements given above is/are correct ?
(a) l only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
29. (b) Dibba means a mound. Since this structure was hidden underneath a mound, it came to be called as Mahanavami dibba. It was on this elevated platform, the king used to sit and watch festivities during the ten day long Dasara festival.
30. Basket-of-eggs topography is related to [NDA 2021-I]
(a) Drumlins.
(b) Eskers.
(c) Cirques.
(d) Moraines.
30. (a) • The term ‘basket of eggs’ topography refers to Drumlins which is a depositional landform formed by glaciers. They are forms of rounded hummocks resulting from the deposition of glacial till which look like inverted boat or spoon
• Drumlins are oval-shaped hills, largely composed of glacial drift, formed beneath a glacier or ice sheet and aligned in the direction of ice flow.
• Drumlins are commonly found in clusters numbering in the thousands. Often arranged in belts, they disrupt drainage so that small lakes and swamps may
form between them. Large drumlin fields are located in central Wisconsin and in central New York; in northwestern Canada; in southwestern Nova Scotia; and in Ireland.
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