Question # 1

How many percentage to water contains oceans?

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67%

77%

87%

97%

Permanent hardness can be removed by using .

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Soda lime

Sodium Zeolite

Quick lime

Lime water

Which one of the following salts makes the water permanent hard.

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

Boiling point of water is:

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0^oC

25^oC

80^oC

100^oC

Water which produces good lather with soap is called.

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Soft water

Hard water

Heavy water

All of them

Chemical formula of hypochlorous acid is.

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HCl

HOCl

H₂CO₃

HF

Temporary hardness can be removed by__________.

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Quick lime

Slaked lime

Lime stone

HCl

soap is the sodium salt of long chain.

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Amino acids

Fatty acids

Nucleotides

None of them

Cholera is caused by

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Protozoa

Virus

Bacteria

Fungi

The bond angle between H-O-H in water is:

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104.5^o

104.6^o

104.7^o

104.8^o

Mercury poisoning cause:

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neurological damage

high blood pressure

kidney damage

gastro

Which element do not causes toxicity in water?

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Lead

Arsenic

Sodium

Mercury

Gypsum in water is.

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Sparingly soluble

Insoluble

Highly soluble

None of them

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