Class 10 Chemistry MCQs - Chapter 7

Environmental Chemistry II Water MCQ (Multiple Choice Questions) PDF - 2

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The MCQs: What percentage of fresh water is available to man; "Environmental Chemistry II Water" App Download Android & iOS (Free) with answers 0.02, 0.2, 0.002 and 0.0002 to study online high school courses. Practice properties of water quiz questions, download Apple Book (Free Sample) for online school classes.

Environmental Chemistry II Water Questions & Answers PDF Download: MCQ Quiz 2

MCQ 6: What percentage of fresh water is available to man?

A) 0.2

B) 0.02

C) 0.002

D) 0.0002

MCQ 7: What is the second step of raw water treatment?

A) sedimentation

B) coagulation

C) filtration

D) chlorination

MCQ 8: What is the percentage of water from rivers and lakes?

A) 0

B) 0.002

C) 0.006

D) 0.021

MCQ 9: Permanent hardness of water is caused due to the presence of dissolved

A) calcium hydrogen carbonates

B) magnesium hydrogen carbonates

C) chlorides of magnesium

D) Sulphates of magnesium

MCQ 10: Step of sewage water treatment in which there are some aeration and organic material is converted to inorganic materials is called

A) primary sewage treatment

B) secondary sewage treatment

C) activated sludge treatment

D) chlorination

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