Class 10 Chemistry MCQs – Practice Test 10 (Chapter 7)

Environmental Chemistry II Water MCQ with Answers PDF Download – Test 10

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The MCQ: What percentage of sodium chloride is present in seawater; "Environmental Chemistry II Water MCQ" App (Android, iOS) with answers: 0.1, 0.02, 0.034, and 0.01 to learn online schools courses. Practice Properties of Water MCQ Questions, download Apple Book (Free Chapter) for online courses.

Environmental Chemistry II Water MCQ – Practice Test 10 PDF Download

MCQ: 46

What percentage of sodium chloride is present in seawater?

0.02
0.1
0.034
0.01

MCQ: 47

Which of the following is an intestinal disease caused by a parasite, entamoeba?

cholera
dysentery
jaundice
hepatitis

MCQ: 48

What is given when electricity is passed through acidified water in a voltammeter?

oxygen only
hydrogen only
nitrogen
oxygen and hydrogen

MCQ: 49

Which of the following is transmitted by fecal contamination of water or food by an encysted organism?

cholera
dysentery
jaundice
hepatitis

MCQ: 50

Step of sewage water treatment in which effluent from a sewage plant is treated with chlorine is called

primary sewage treatment
secondary sewage treatment
activated sludge treatment
chlorination

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