1721. Ultraviolet radiation in the stratosphere is absorbed by –
A. SO2
B. Ozone
C. Oxygen
D. Argon
✅ The correct answer is option B.
UPSC
1722. Desertification can be checked by –
A. plugging gullies
B. checking over-grazing
C. contour ploughing
D. forming shelter belts
✅ The correct answer is option B.
1723. Rainfall caused by intense evaporation in equatorial areas is called .
A. Orographic rainfall
B. Cyclonic rainfall
C. Frontal rainfall
D. Convectional rainfall
✅ The correct answer is option D.
1724. Winds blowing constantly in one direction in rocky deserts form –
A. Chimneys
B. Mushrooms rocks
C. Yardangs
D. Demoiselles
✅ The correct answer is option C.
1725. What process takes place during the youthful stage of a river?
A. Valley widening
B. River rejuvenating
C. Valley deepening
D. Meandering
✅ The correct answer is option C.
1726. Which of these is a dwarf planet?
A. Neptune
B. Titan
C. Eris
D. Hydra
✅ The correct answer is option C.
1727. The planet nearest to the Sun is –
A. Earth
B. Mercury
C. Mars
D. Venus
✅ The correct answer is option B.
1728. Which of the following does not belong to the solar system?
A. Asteroids
B. Comets
C. Planets
D. Nebulae
✅ The correct answer is option D.
1729. The number of satellites of the planet is Mercury is –
A. ‘0’
B. 1
C. 2
D. 16
✅ The correct answer is option A.
1730. Why the Earth is having its own atmosphere?
A. Winds
B. Clouds
C. Gravity
D. Rotation of the Earth
✅ The correct answer is option C.