Question # 1

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

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Jaundice

Dysentery

Cholera

Typhoid

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

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Joundice

Cholera

Dysentery

Typhoid

Which element protects teeth from decay?

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Potassium

Fluorine

Sodium

Calcium

How many percentage to water contains oceans?

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67%

77%

87%

97%

Temporary hardness can be removed by__________.

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Quick lime

Slaked lime

Lime stone

HCl

Which gas is used to destroy harmful bacteria in water?

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Iodine

Chlorine

Flourine

Bromine

soap is the sodium salt of long chain.

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Amino acids

Fatty acids

Nucleotides

None of them

Which process is responsible for ascending of water in plants from roots to leaf?

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Condensatin

Transpiration

Capillary action

Evaporation

Temporary hardness is due to the presence of bicarbonates of.

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Calcium

Magnsium

Both of them

None of them

Water dissolves non-ionic compound by

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Ion-ion forces

Ion-dipole forces

Dipole -dipole forces

Hydrogen bonding.

The density of water is ................. at 4^oC

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1 gcm^-1

2 gcm^-1

3 gcm^-1

4 gcm^-1

Cholera is caused by

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Protozoa

Virus

Bacteria

Fungi

At which temperature o water shows mxamimum density.

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0 ^oC

100^oC

4^oC

-4^oC

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