Question # 1

One H₂O molecule can form hydrogen bonding with how many other H₂O molecules?

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One

Two

Three

Four

Which disease cause when humans use water of industrial effuents.

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Cancer

Asthma

Jaundica

Cholera

Example of pest is

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Weeds

Herbs

Insect

All of them

Chemical form of gypsum.

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MgSO₄. 5H₂O

CaSO₄. 2H₂O

FeSO₄. 5H₂O

CuSO₄. 5H₂O

Hook worm infects.

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Liver

Small intestine

Large intestine

Stomach

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

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Carbonat salt

Sulphonic acid

Sulphat salt

Phosphate salt

Which element protects teeth from decay?

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Potassium

Fluorine

Sodium

Calcium

Temporary hardness is because of .

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Ca(HCO₃)₂

CaCO₃

MgCO₃

MgSO₄

Which organ cause to function during Jaundice?

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Liver

Kindney

Stomach

Large intestine.

A sea level the boiling point of water is.

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0^oC

98^oC

100^oC

110^oC

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

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NaCO₃

NaHCO₃

Ca(HCO₃)₂

CaSO₄

Water molecule show structure.

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Tetrahedral

Trigonal

Pentagonal

All of them

Chemical formula of hypochlorous acid is.

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HCl

HOCl

H₂CO₃

HF

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