1
Fatima is studying the benefits of natural substances found in water. She knows that some minerals are beneficial for health. Which of the following is a benefit of natural substances in water?
2
Sam is studying inadequate water supply in Pakistan. He knows that many areas face water shortages. What is a consequence of inadequate water supply?
3
Yusuf is studying water pollution. He knows that phosphates from detergents can cause problems. What is a major issue caused by phosphates in water?
4
Hina is studying wastewater. She knows that wastewater contains harmful microbes. What is a major concern with harmful microbes in water?
5
Which method is used to remove permanent hardness?
6
Ming is studying the disadvantages of natural substances in water. He knows that some substances can affect water quality. Which of the following is a disadvantage of phosphates in water?
7
Xia is learning about the treatment of domestic water. She knows that sedimentation allows particles to settle. What is the purpose of sedimentation?
8
Permanent hardness of water is caused by:
9
Oliver is learning about waterborne diseases. He knows that typhoid is a waterborne disease. Which of the following is also a waterborne disease?
10
David is studying the treatment of domestic water. He knows that raw water treatment involves several steps. What is the first step in the treatment of raw water?