Question # 1

Temporary hardness can be removed by__________.

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Quick lime

Slaked lime

Lime stone

HCl

Permanent hardness is removed by adding.

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Na₂ zeolite.

Soda lime

Lime water

Quick lime

Hook warm larvae enter the body through.

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Food

Water

Skin

All of them

How many times the heat capacity of water is greater than that of rocks.

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Two

Three

Four

Six

Water has a maximum density at .

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10^oC

0^oC

4^oC

100^oC

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

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One

Two

Three

Four

The freezing point of water is:

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10 ^oC

100^oC

0^oC

46^oC

Mg²⁺ and Ca²⁺ ions react with soap to form calcium and magnesium salts of fatty acids called.

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Gelatin

Scum

Paste

None of them

Example of pest is

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Weeds

Herbs

Insect

All of them

A sea level the boiling point of water is.

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0^oC

98^oC

100^oC

110^oC

Which disease cause liver inflammation?

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Typhoid

Jaundice

cholera

Hepatitis

Mercury poisoning cause:

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neurological damage

high blood pressure

kidney damage

gastro

Water molecule has a structure:

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Ionic

Non polar

Tetrahedral

Polar

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