CBSE Questions for Class 7 Chemistry Soil Quiz 1 - MCQExams.com

$$\textbf{Correct option: }$$ C

$$\textbf{Solution: }$$ 

$$\textbf{Option (A) }$$

$$\bullet$$The clay soil consists of the smallest soil particles with larger surface area. 

$$\bullet$$Clay also has very less aeration, because water displaces air between the spaces of clay particles.

$$\bullet$$A larger surface area allows better water holding capacity of soil . 

$$\bullet$$The particles of the sandy soil are larger and the space between them is quite smaller. 

$$\bullet$$The smaller surface area of the soil reduces the water handling capacity of the soil. 

$$\textbf{Option (B) }$$

$$\bullet$$The loam soil is composed of sand, silt, and clay soil.

$$\bullet$$Therefore, the percentage holding capacity of water in this soil is also less as compared to the silt or clay soil.

 $$\bullet$$The particles of the sandy soil are larger and the space between them is quite smaller. 

$$\bullet$$The smaller surface area of the soil reduces the water handling capacity of the soil. 

$$\textbf{Option (C) }$$

$$\bullet$$The loam soil is composed of sand, silt, and clay soil.

$$\bullet$$Therefore, the percentage holding capacity of water in this soil is also less as compared to the silt or clay soil.

$$\bullet$$Clay also has very less aeration, because water displaces air between the spaces of clay particles.

$$\bullet$$This results in the better water holding capacity of the clayey soil. 

Hence, the correct option is (C)