1771. Black soil is also known by which of the following name?
A. Khadar Soil
B. Bangar Soil
C. Alluivial Soil
D. Regur soil
✅ The correct answer is option D.
UPSC
1772. Natural sources of air pollution are –
A. Forest fires
B. Volcanic eruptions
C. Dust storm
D. Smoke from burning dry leaves
✅ The correct answer is option B.
1773. Which of the following is a typical feature of river erosion in youthful stage?
A. Ox-bow lake
B. Gorge
C. Valley in valley
D. Cut-bank
✅ The correct answer is option B.
1774. What is the interval between a high tide and neaptide at a given place?
A. 12 hours
B. 12 hours 26 minutes
C. 15 hours 30 minutes
D. 24 hours
✅ The correct answer is option B.
1775. Hanging Valley is very common in –
A. high mountains
B. sub-Arctic region
C. glaciated areas
D. coastal belt
✅ The correct answer is option B.
1776. The latitude of a place is expressed by its angular distance in relation to—
A. Equator
B. South Pole
C. Axis of the Earth
D. North Pole
✅ The correct answer is option A.
1777. The Mohorovicic (Moho) Discontinuity separates –
A. Outer core and Mantle
B. Inner and Outer core
C. Sima and Nife
D. Crust and Mantle
✅ The correct answer is option D.
1778. Mica is found in which one of the following pairs of rocks?
A. Slate- Sandstone
B. Schist-Gneiss
C. Limestone-Sandstone
D. Shale- Limestone
✅ The correct answer is option B.
1779. Hanging Valley is formed due to the action of –
A. Glacier
B. River
C. Ocean
D. Wind
✅ The correct answer is option A.
1780. The layer of the atmosphere in which Radio Waves are reflected back is called-
A. Ionosphere
B. Troposphere
C. Stratosphere
D. Exosphere
✅ The correct answer is option A.