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CHEM 1001: Water Cycle and Sources of Drinking Water

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CHEM 1001: Water Cycle and Sources of Drinking Water

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Questions and Answers

What is the main concern about bottled water safety?

The total dissolved solids (TDS) level (correct)

The hardness as calcium carbonate

The presence of dissolved gases

The pH level

What is a characteristic of hard water?

Produces lather with soap

Does not contain any dissolved substances

Has a low total dissolved solids (TDS) level

Contains dissolved calcium and magnesium salts (correct)

Why is rain water considered safe for drinking?

It contains harmful dissolved gases

It has a high total dissolved solids (TDS) level

It is free from harmful contaminants (correct)

It has a low pH level

What is the primary concern regarding ocean water for drinking purposes?

High total dissolved solids (TDS) level Signup and view all the answers

What is the disadvantage of sterilizing water with Bleaching powder (CaOCl2)?

It is very expensive Signup and view all the answers

Which method introduces calcium in water during the conditioning process?

Carbonate conditioning Signup and view all the answers

What does the Lime Soda Process involve in water treatment?

Introduces calcium in water Signup and view all the answers

What are ion exchange resins used for in the water treatment process?

Demineralization process Signup and view all the answers

What method is used to estimate water hardness?

Titrimetric Method Signup and view all the answers

What color does the weak complex of metal ion and EBT form?

Wine red Signup and view all the answers

Which method is used to sterilize and disinfect water through oxidation?

Ozonisation (O3) Signup and view all the answers

What is the advantage of UV treatment for water sterilization?

Bactericidal and sporicidal Signup and view all the answers