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27 Water MCQ2

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Questions and Answers

What is the purpose of adding fluorine to water?

To adjust pH levels

To kill pathogenic bacteria

To remove permanent hardness

To strengthen teeth and prevent decay (correct)

What is the process by which suspended particles settle to the bottom of a tank?

Chlorination

Flocculation

Filtration

Sedimentation (correct)

What is the process of removing ions from water using a cation exchange resin?

Filtration

Deionisation (correct)

Ion exchange

Distillation

What is the purpose of adding lime (Ca(OH)2) to water?

To adjust pH levels Signup and view all the answers

What is the process of coming together of small suspended solids in water?

Flocculation Signup and view all the answers

What is the purpose of adding chlorine to water?

To kill pathogenic bacteria Signup and view all the answers

What is the primary difference between temporary and permanent hardness?

Temporary hardness can be removed by boiling, while permanent hardness cannot. Signup and view all the answers

Which of the following is NOT a method of removing suspended solids from water?

Chlorination Signup and view all the answers

What is the purpose of adding Na+ ions in the ion exchange process?

To remove calcium and magnesium ions from hard water Signup and view all the answers

Which of the following is an example of a permanent hardness-causing ion?

CaSO₄ Signup and view all the answers