Geology and Geophysics
2025 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE GG-1 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 43–45 of 65. Imported answers require review unless explicitly marked reviewed.
Question 43
Open questionGGNAT1 markNeeds review
The sediment yield at the outlet of a river having a catchment area of 8 km
is 6000 tons/year. If the sediment density is 1.5 g/cm
, the average erosion rate of the river basin is __________ mm/yr.(Round off to two decimal places)
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Open questionGGNAT1 markNeeds review
In a hypothetical rock, the K
values of element E in minerals M1, M2, and M3 are 1.5, 1.0, and 0.5, respectively. The modal abundances of M1, M2, and M3 are 10%, 40%, and 50%, respectively. The bulk partition coefficient of element E in this rock is __________(Round off to two decimal places)
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Open questionGGMCQ2 marksNeeds review
A particular Index of Alteration (IA) is defined as the molar concentration ratio (expressed as weight percentage) of fluid immobile element(s) to fluid mobile element(s) and is expressed by 100 × ([Al
O
] / ). For chemical weathering of silicate rocks, which one of the following statements is correct?Your answerChoose one option.
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