Question # 1

Industrial effluents are highly

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Toxic organic compounds.

Inorganic salts.

Heavy metals

All of them

Which of the following in soluble in water.

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Organic acids

Glucose

Alcohal

All of them

Permanent hardness is removed by adding.

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Na₂ zeolite.

Soda lime

Lime water

Quick lime

Which hepatitis is caused by contaminated water?

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Hepatitis A

Hepatitis B

Hepatitis C

Hepatitis D

Temporary hardness can be removed by__________.

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Quick lime

Slaked lime

Lime stone

HCl

Rapid growth of algae in water bodies in because of detergent having.

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Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

Cholera is caused by

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Protozoa

Virus

Bacteria

Fungi

The lives of aquatic plants and animals are indirectly related to concentration of dissolved gas in water.

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Nitrogen

Hydrogen

Oxygen

Carbon

Which of the following in insoluble in water.

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Benzene

NaCl

KCl

All of them

Chemical formula of hypochlorous acid is.

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HCl

HOCl

H₂CO₃

HF

Hook warm larvae enter the body through.

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Food

Water

Skin

All of them

Water dissolves non-ionic compound by

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Ion-ion forces

Ion-dipole forces

Dipole -dipole forces

Hydrogen bonding.

Chemical form of gypsum.

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MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

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