Class 7 Online Courses

Chapter 14: Class 7 Science Exam Tests

Class 7 Science MCQs - Chapter 14

Importance of Water Multiple Choice Questions PDF Download - 13

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Importance of Water Questions & Answers PDF Download: MCQ Quiz 13

MCQ 61: In sewage treatment plants, large material is removed by

A) metal screen
B) grit tank
C) sludge tank
D) filter bed

MCQ 62: Desalination plants are used to convert

A) hot water to cold water
B) cold water to hot water
C) tasteless water to salty water
D) salty water to tasteless water

MCQ 63: The population which does not have tap water in their homes, is

A) two-third of the world population
B) one-third of the world population
C) half of the world population
D) quarter of the world population

MCQ 64: Water can be kept clean by detergents, if they are

A) not poisonous
B) odorless
C) biodegradable
D) non biodegradable

MCQ 65: 'Distillation' can also be used to treat

A) fresh water
B) sewage water
C) polluted water
D) rain water

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Importance of Water App (Android & iOS)

Importance of Water App (Android & iOS)

7th Grade Science App (Android & iOS)

7th Grade Science App (Android & iOS)

Earth Science App (Android & iOS)

Earth Science App (Android & iOS)

8th Grade Science App (Android & iOS)

8th Grade Science App (Android & iOS)