Question # 1

Which one of the following ion does not cause hardness in water?

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Ca⁺²

Mg^-2

SO^-2

Na⁺

Permanent hardness can be removed by using .

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Soda lime

Sodium Zeolite

Quick lime

Lime water

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

Density of water at 4°C is:

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0.976 gem-3

1 gem-3

0.956 gem-3

1.1 gem-3

The percentage of water in human body is.

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40%

50%

60%

70%

Temporary hardness is because of.

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Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

Which compound protect teeth from diseases?

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Fluorine compound

Chlorine compound

Iodine compound

Bromine compound

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

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Jaundice

Dysentery

Cholera

Typhoid

Which disease cause when humans use water of industrial effluents.

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Cancer

Asthma

Jaundice

cholera

Vibrious cholera bacteria causes the disease

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Cholera

Diarrhea

Jaundice

Hepatitis

Which process is responsible for ascending of water in roots:

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evaporation

transpiration

condensation

capillary action

Hook worm infects.

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Liver

Small intestine

Large intestine

Stomach

The process by which water rises up from the roots of plants to leaves is called.

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Photosynthesis

Respiration

Surface tension

Capillary action

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