Class 7 Science MCQs - Chapter 13
Importance of Water Multiple Choice Questions (MCQs) PDF Download - 13
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The Importance of water Multiple Choice Questions (MCQs) with Answers PDF (importance of water MCQs PDF e-Book) download Ch. 13-13 to study Grade 7 Science Course. Learn Importance of Water Quiz Questions and Answers to learn online courses. The Importance of Water MCQs App Download: Free learning app for sewage system, distillation, safe and drinking water, saving water test prep for online certifications.
The MCQ: In sewage treatment plants, large material is removed by; "Importance of Water" App Download (Free) with answers: Grit tank; Metal screen; Sludge tank; Filter bed; to learn online courses. Solve Sewage System MCQ Questions, download Google eBook (Free Sample) for online elementary school courses.
Importance of Water MCQs with Answers PDF Download: Quiz 13
In sewage treatment plants, large material is removed by
- metal screen
- grit tank
- sludge tank
- filter bed
Desalination plants are used to convert
- hot water to cold water
- cold water to hot water
- tasteless water to salty water
- salty water to tasteless water
The population which does not have tap water in their homes, is
- two-third of the world population
- one-third of the world population
- half of the world population
- quarter of the world population
Water can be kept clean by detergents, if they are
- not poisonous
- odorless
- biodegradable
- non biodegradable
'Distillation' can also be used to treat
- fresh water
- sewage water
- polluted water
- rain water
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