Pure Water

1.How Is Water Purified in the Purification Plant?

Water is purified in the purification plant by the following steps—

• The water is vigorously bubbled with air.
• Some chemicals (like alum) are added to the bubbled water.
• The water is then gently and continuously stirred.
• The water is left undisturbed for some time, leading to settling contaminants at the bottom.
• The water separated from impurities is then filtered and disinfected using chlorine or UV rays.

2.What Is Alum Used for? What Happens When We Add Alum to Muddy Water?

• Alum is used for purification of water.
• Alum particles are capable of attracting mud or dust particles in the water.
• Once it is dissolved in water, it attracts the mud particles, and they settle down at the bottom of the container after some time.

3.Why Is the Water Dripping From the Rocks in the Mountains Pure in Nature and Taste Good?

• The water dripping from the rocks in the mountains comes from the melted glaciers.
• Glaciers are the source of freshwater; hence the dripping water tastes good.
• Moreover, when water passes through multiple layers of rocks or soil, it gets filtered naturally due to the removal of contaminants.
• Thus, the water is automatically purified.