Question # 1

the removal of which ion causes water softening.

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Na⁺

Mg²

Li⁺

K⁺

The percentage of water in human body is about:

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60%

50%

70%

80%

Water has a maximum density at .

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10^oC

0^oC

4^oC

100^oC

The removal of Mg⁺² and Ca⁺² Ion which are responsible for the hardness of water is called.

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Temporary hardness

Permanent hardness

Water softening

Hydrogen bonding

Which of the following gas is used to destroy harmful bacteria in water.

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Iodine

Chlorine

fluorine

Bromine

Water molecule has a structure:

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Ionic

Non polar

Tetrahedral

Polar

The depletion of which gas results in the death of aquatic life.

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Oxygen

Carbon di oxide

Boath of them

Nome of them

Inland water includes.

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River

Lakes

Streams

All of them

Hook warm larvae enter the body through.

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Food

Water

Skin

All of them

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

The process of removing temporary hardness of water.

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Clark's method

Washing soda method

Sodium zeolite

Filteration method

Specific heat capacity of water is.

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4.2 KJg^-1 K^-1

4.2 Jg^-1K^-1

2.4 KJg^-1K^-1

2.4 Jg^-1K^-1

Hook worm infects.

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Liver

Small intestine

Large intestine

Stomach

Vibrious cholera causes.

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Choleera

Dysentery

Fluorsis

Hepatitis

Temporary hardness is because of .

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Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

Which one of the following diseases causes liver inflammation?

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Typhoid

Jaundice

Cholera

Hapatitis

Which disease cause when humans use water of industrial effuents.

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Cancer

Asthma

Jaundica

Cholera

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