This website is made to help students prepare for their competitive exams with ease and confidence.
Q11. Correct rock-texture pairs
Basalt-Porphyritic Porphyroblastic-Metamorphic rocks
Q12. Rise in atmospheric CO2 leads to:
CO2 absorption forms carbonic acid (lowering pH) and bicarbonate ions, while consuming carbonate ions (Ocean Acidification).
Q13. Negative Eu anomalies in granite are explained by:
Europium is compatible in Plagioclase. If plagioclase is removed (fractionation) or left in the residue, the resulting melt (Granite) is depleted in Eu.
Q14. NOT true marine organism statements
Forams are unicellular and having higher benthic diversity
Q15. Three pixels P, Q, R have NDVI values +0.84, +0.01, -0.89. Identify them.
High positive NDVI (+0.84) indicates healthy vegetation. Low positive (+0.01) indicates barren soil. Negative (-0.89) indicates water.
Q16. Correct property of clay minerals:
Kaolinite is a 1:1 (Two-layered) clay. Montmorillonite is a 2:1 clay that swells. Illite is 2:1 non-swelling.
Q17. Which statement is correct regarding Earth's magnetic field lines at the poles and equator?
Magnetic field lines run parallel to the surface (Horizontal, Inclination=0) at the magnetic equator and perpendicular (Vertical, Inclination=90) at the poles.
Q18. Incorrect Himalayan stratigraphy
Tethyan is Paleozoic–Mesozoic & The Lesser Himalayan Sequence rocks are not younger than the Higher Himalayan Crystallines
Q19. Which of the following time boundaries correspond(s) to major mass extinction events?
The Permian-Triassic extinction (The Great Dying) was the most severe, eliminating ~96% of marine species. Cretaceous-Paleogene is also a mass extinction.
Q20. Factors reducing landslide failure
They increase resisting forces