Question # 1

The salts of which element are present in detergent that causes the rapid growth of algae in water bodies is.

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Phosphate

Calcium

Sodium

All of them

Which element do not causes toxicity in water?

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Lead

Arsenic

Sodium

Mercury

Which one of the diseases causes severe diarrhea and can be fatal?

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Jaundice

Dysentery

Cholera

Typhoid

A disease is caused by excess of bile pigments in the blood is.

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Typhoid

Jaundice

Cholera

Dysentery

Neurological damage is caused by the poisoning of.

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Lead

Cadimium

Mercury

All of them

Cholera is caused by

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Protozoa

Virus

Bacteria

Fungi

Which compound protect teeth from diseases?

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Fluorine compound

Chlorine compound

Iodine compound

Bromine compound

Water molecule has a structure:

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Ionic

Non polar

Tetrahedral

Polar

Mercury poisoning cause:

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neurological damage

high blood pressure

kidney damage

gastro

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

Water dissolves non-ionic compound by

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Ion-ion forces

Ion-dipole forces

Dipole -dipole forces

Hydrogen bonding.

The density of water is ................. at 4^oC

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1 gcm^-1

2 gcm^-1

3 gcm^-1

4 gcm^-1

The percentage of ocean in world water is.

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50%

67%

97%

25%

Mg²⁺ and Ca²⁺ ions react with soap to form calcium and magnesium salts of fatty acids called.

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Gelatin

Scum

Paste

None of them

Which disease is caused by polluted water.

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Cholera

Typhoid

Diarrhea

All of them

Sodium zeolite is naturally occurring reason of .

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NaAl (SiO₃)₂

Na₂CO₃

CaCO₃

Na₂SIO₃

Which element protects teeth from decay?

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Potassium

Fluorine

Sodium

Calcium

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