NCERT Solutions for Class 12 Home+science Home Science Chapter 23 Water Safety

Inspite of using chlorine tablets, the drinking water was declared unsafe. What could be four possible reasons for this?

For purifying her drinking water, Geeta has to buy either reverse osmosis filter or an ordinary electric filter. Help her take a decision by giving her all the necessary information she would require about these filters.

People of Basra village use alum to make their water potable. Convince them to use chlorine tablets instead. Tell them about the procedure to use these tablets, two advantages of using the tablets and two precautions while using them.

During rainy season almost everyone in a specific locality suffers from stomach ailments. You have suggested them to use chlorine tablets to make water safer for drinking. Write the method and give two reasons for your suggestion. Also, write two precautionary measures while using these tablets.