Class 10 Chemistry MCQs - Chapter 7

Environmental Chemistry II Water Trivia Questions & Answers PDF Download - 4

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Environmental Chemistry II Water Test Questions and Answers PDF Download: MCQ 4

MCQ 16:

Which of the following is the most abundant salt in seawater?

magnesium chloride
calcium chloride
sodium chloride
sodium nitrate

MCQ 17:

Which of the following is a disease in which excess of bile from the liver enters the blood and causes yellowness of skin and eyes?

cholera
dysentery
jaundice
hepatitis

MCQ 18:

Property due to which water acts as a universal solvent is its

polarity only
ability to make hydrogen bond only
strong dipole dipole interaction
polarity and ability to make hydrogen bond

MCQ 19:

What is the first step of raw water treatment?

sedimentation
coagulation
filtration
chlorination

MCQ 20:

The fourth step of sewage water treatment is called

primary sewage treatment
secondary sewage treatment
activated sludge treatment
chlorination

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