Which of the following geographical features or phenomena is/are associated with the Peninsular Block of India?
1. Submergence of parts of the western coast due to tectonic activity
2. Presence of residual mountain ranges such as the Veliconda hills and Mahendragiri hills
3. Deep, V-shaped river valleys formed by fast-flowing rivers
Select the answer using the code given below:
A.1 only
B.1 and 2
C.2 and 3
D.3 only
Explanation: * Statement 1 is correct: Since the Cambrian period, the Peninsular block has stood as a rigid block, with the exception of parts of its western coast which submerged beneath the sea due to vertical tectonic movements and block faulting. * Statement 2 is correct: The Peninsula consists mostly of relict and residual mountains, such as the Veliconda hills, Mahendragiri hills, Nallamala hills, Javadi hills, and the Palkonda range. * Statement 3 is incorrect: Deep, V-shaped river valleys are formed by the youthful, fast-flowing rivers of the Himalayas. River valleys in the older Peninsular Block are shallow with low gradients.
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📌 Structure and Physiography of IndiaRelevance 95%
Which of the following are the evidences of the phenomenon of continental drift?
I. The belt of ancient rocks from Brazil coast matches with those from Western Africa.
II. The gold deposits of Ghana are derived from the Brazil plateau when the two continents lay side by side.
III. The Gondwana system of sediments from India is known to have its counterparts in six different landmasses of the Southern Hemisphere.
Select the correct answer using the code given below.
A.I and III only
B.I and II only
C.I, II and III
D.II and III only
Explanation: * Statement I is correct: Radiometric matching confirms that a 2,000-million-year-old belt of ancient rocks along the Brazilian coast correlates exactly with rock formations in Western Africa. * Statement II is correct: Thick glacial tillite found at the base of the Gondwana sedimentary sequence in India is mirrored perfectly across five other Southern Hemisphere landmasses (Africa, Falklands, Madagascar, Antarctica, Australia), indicating identical geological histories. * Statement III is correct: Ghana's coast holds rich gold placer deposits despite lacking local source rocks; these match the gold veins found in Brazil, proving the continents lay side-by-side when the gold was deposited.
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📌 Distribution of Oceans and ContinentsRelevance 98%
2025Statement-I, II & III (Multi-Assertion Style)Geomorphology & Lithosphere
Consider the following statements:
Statement I: In the context of effect of water on rocks, chalk is known as a very permeable rock whereas clay is known as quite an impermeable or least permeable rock.
Statement II: Chalk is porous and hence can absorb water.
Statement III: Clay is not at all porous.
Which one of the following is correct in respect of the above statements?
A.Both Statement II and Statement III are correct and both of them explain Statement I
B.Both Statement II and Statement III are correct but only one of them explains Statement I
C.Only one of the Statements II and III is correct and that explains Statement I
D.Neither Statement II nor Statement III is correct
Explanation: * Statement I is correct: Chalk is structurally permeable, allowing groundwater to easily pass through, while tightly structured clay is highly impermeable. * Statement II is correct: Chalk consists of microscopic organic shell deposits, forming a highly porous structure with interconnected pathways that trap and pass water easily, explaining its high permeability. * Statement III is not correct: Clay actually has a high micro-porosity, but because its microscopic particles are packed tightly together, the pore spaces are isolated and not interconnected. This locks out water flow and makes it impermeable, rendering Statement III false. Thus, option (c) is correct.
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📌 Landforms and Their EvolutionRelevance 55%
2024Multi-statement (How Many Style)Geomorphology & Lithosphere
Consider the following:
1. Pyroclastic debris
2. Ash and dust
3. Nitrogen compounds
4. Sulphur compounds
How many of the above are products of volcanic eruptions?
A.Only one
B.Only two
C.Only three
D.All four
Explanation: * Items 1, 2, 3, and 4 are correct: Volcanic eruptions project an array of molten, fragmented, and gaseous materials sourced from the weaker asthenosphere layer of the upper mantle. * The physical material discharged includes liquid lava flows, high-velocity fragments of pyroclastic debris, volcanic bombs, fine ash, and gas complexes like nitrogen compounds, sulphur compounds, and trace amounts of chlorine, hydrogen, and argon. Thus, all four items are products.
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📌 Interior of the EarthRelevance 95%
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