CBSE Questions for Class 7 Chemistry Soil Quiz 3 - MCQExams.com

Eastern states are mostly covered with these soils.
  • Red and yellow soils
  • Alluvial soils
  • Forest and mountainous soils
  • Laterite soils
If the percolation rate of water through a soil sample is 50 mL/min, then how much time will 500 mL of water take to percolate completely into the soil?
  • 5 minutes
  • 10 minutes
  • 15 minutes
  • 20 minutes
Percolation rate of water is least in :
  • Sandy soil
  • Clay soil
  • Loamy soil
  • Bricks
Read the following statements.

(a) Both _______ and_______ soils are suitable for growing wheat and gram.
(b) Paddy requires soil rich in ______ and _____ with a good capacity to retain water.
(c) For pulses, _______ soil is best suitable.

Select the option which correctly fills the blanks in any two of the statements.
  • (a)- Clayey, Loamy, (c)- Loamy
  • (b)- Sand, Gravel (c)- Clayey
  • (a)- Clayey, Sandy, (b)- Loam, Organic matter
  • (b)- Clay, Loam, (c)- Sandy
If the percolation rate of water of a particular soil sample is $$30mL/min$$, then how much time will $$300mL$$ of water take to percolate completely into the soil?
  • $$800\ sec$$
  • $$600\ sec$$
  • $$200\ sec$$
  • $$400\ sec$$
The soil which is a mixture of sand, clay and silt is known as __________.
  • Loamy soil
  • Sandy soil
  • Clayey soil
  • Desert soil
A loamy soil usually contains:
  •  mixture of sand and clay 
  •  only clay
  • only sand
  • mixture of sand, clay and silt
Which of the following is(are) the basic component(s) of soil?
  • minerals
  • organic matter
  • water
  • air
________ retains maximum amount of water.
  • Red soil
  • Clayey soil
  • Sandy soil
  • Desert soil
Read the following statements with reference to soil.
i) Weathering is a very fast process of soil formation.
ii) Percolation of water is faster in sandy soils.
iii) Loamy soil contains only sand and clay.
iv) Top soil contains the maximum amount of humus. 
Choose the correct statements from the above. 
  • (ii) and (iv)
  • (i) and (iii)
  • (ii) and (iii)
  • (i) and (ii)
If the percolation rate of water of a particular soil sample is $$20$$ ml/min, then how much time will $$200$$ ml of water take to percolate completely into the soil?
  • $$800$$s
  • $$600$$s
  • $$200$$s
  • $$400$$s
Topsoil contains the following:
  • Humus and living organisms only
  • Humus and soil particles only
  • Humus, living organisms and plants
  • Humus, living organisms and soil particles
The soil of Kerala is rich in which of the following soils?
  • clayey soil
  • Laterite Soil
  • Sandy Soil
  • Loamy Soil
What happens when rain falls on soil without vegetation cover?
  • Rainwater percolates through soil efficiently.
  • Rainwater washes way the top soil.
  • Rainwater does not cause any change in soil.
  • None of these
Which type of soil is more likely to be removed very quickly?
  • The soil having not vegetative cover
  • The soil that is base of vegetation
  • The soil covered with grass
  • All of these
The upper layer of soil has excess of:
  • rocks
  • gravel
  • humus
  • all of these
Removal of the soil by the action of wind and water is known as :
  • Erosion
  • weathering
  • percolation
  • Convection
Percolation rate of water is ______ in different types of soil. 
  • same
  • different
  • undefined
  • None of these
Erosion of soil is more severe in areas of:
  • desert and barren land
  • high vegetation
  • dense forests
  • Both A and B
Crops such as _____are grown in fine clayey soils, because they are rich in humus and are very fertile.
  • Lentils
  • Cotton
  • Wheat
  • All of these
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