Question # 1

Which disease cause when humans use water of industrial effluents.

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Cancer

Asthma

Jaundice

cholera

Ionic compounds are soluble in water due to:

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Hydrogen bonding

ion-dipole forces

Dipole-dipole forces

Dipole -induced dipole forces

Industrial effluents are highly

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Toxic organic compounds.

Inorganic salts.

Heavy metals

All of them

At which temperature o water shows mxamimum density.

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0 ^oC

100^oC

4^oC

-4^oC

Clark's method is used to remove the hardness of water, in this method which is used.

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Ca(HCO₃)₂

Na-Zeolite

Ca-Zeolite

Ca(OH)₂

Water has a maximum density at .

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10^oC

0^oC

4^oC

100^oC

Temporary hardness is due to the presence of bicarbonates of.

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Calcium

Magnsium

Both of them

None of them

Permanent hardness can be removed by using .

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Soda lime

Sodium Zeolite

Quick lime

Lime water

Some organic compound are soluble in water due to the presence of .

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-OH

H⁺

Botha a and b

Covalent bond

Example of pest is

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Weeds

Herbs

Insect

All of them

Water dissolves Non-ionic compounds by:

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Ion-Ion forces

Dipole forces

Dipole - Dipole forces

Hydrogen Bonding

The percentage of water in human body is.

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40%

50%

60%

70%

Which element protects teeth from decay?

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Potassium

Fluorine

Sodium

Calcium

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