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Generan Knowiedpe for XAT
The most abundant element of the earth's crust is (a) Silicon (b) Oxygen (d) Iron 71
Solution: b. Oxygen is the most abundant element of the earth's crust followed by silicon, aluminium and iron.
Which of the following is not a metamorphic rock? (a) Gneiss (b) Slate (c) Granite (d) Marble 72
Solution: c. Granite is an igneous rock of visible crystalline formation and texture. It is composed of feldspar and quartz, with a small amount of mica
Consider the following statements I.The continental crust of the earth is thinner than the oceanic crust II. The asthenosphere is a layer found at the top of the upper mantle. Which of the above statements is/are correct? (a) I (b) II (c) I and II (d) None 73
Solution: d. The average thickness of the oceanic crust is about 5 km while the average thickness of the continental crust is about 40 km The asthenosphere is a 100 km thick layer found at the top of the lower mantle.
onsider the following statements I. Metamorphic rocks are also called primary or basic rocks Igneous rocks are formed when magma cools and solidifies. Which of the above statements is/are correct? (a) I (b) II (c) I and II (d) None 74
Solution: Igneous rocks are formed by the solidification of magma while metamorphic rocks and sedimentary rocks are composed of pre-existing rocks.
Consider the following statements The San Andreas fault is a result of collision between oceanic and continental plates II.T zinc. Which of the above statements is/are correct? he inner core of the earth is made mostly of copper and (b) II (c) I and II (d) None 76
Solution: c. Lake Baikal, the deepest lake in the world, is a fresh water lake located in Siberia. It is the deepest lake in the world with a maximum depth of 1,637 m. It is estimated to contain approximately one-fifth of all the earth's fresh surface water.
Solution: d. The Pamir Knot is the meeting place of many mountains. It is located in the extreme north of India
Which of the following is the second highest peak in the world? (a) Kanchenjunga (b) K2 (c) Lhotse (d) Nanga Parbat 79
Solution: b. K2, at 8,611 m, is the second tallest mountain in the world. Only Mount Everest is taller than K2
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