Question

In coastal areas and in the sea! Determine whether the following statements are True or False.

Statement True / False
(a) River water and sewage are natural water resources.
(b) Alum and slaked lime are added in the coagulation tank.
(c) Chlorination can remove impurities in the water.​
A) T, T, F
B) F, T, T
C) T, F, T
D) F, F, T

Answer 1

River water and sewage are not natural water resources. Alum and slaked lime are added in the coagulation tank. Chlorination can remove impurities in the water.

Step-by-step explanation:

a) False. River water and sewage are not natural water resources, rather they are sources of water pollution. Natural water resources include lakes, rivers, and groundwater sources that are not contaminated.

b) True. In the coagulation tank, alum (Al2(SO4)3 12 H2O) and slaked lime (Ca(OH)2) are added. Alum helps in coagulation by neutralizing the negative charge of dirt particles in the water, while slaked lime helps to adjust the pH of the water.

c) True. Chlorination is a common method used to disinfect water and remove impurities. It kills harmful bacteria, viruses, and other microorganisms that may be present in the water.