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Chemistry

Chemistry
Bleaching powder is used in drinking water as a/an

Disinfectant
Coagulant
Antibiotic
Antiseptic

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Chemistry
Substance used as an anti freeze in radiators of automobiles is :

Methyl alcohol
Methyl alcohol and H2O
Ethyl alcohol and H2O
Ethyl alcohol

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Chemistry
Which of the following is ozone depleting pesticide ?

Methyl bromide
Ethylene ozonide
D.T.
Benzene

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Chemistry
Which metal is extracted from sea water?

Aluminium
Potassium
Magnesium
Beryllium

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Chemistry
The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas

Will increase four-fold
Will be reduced to half
Remains unchanged
Will be doubled

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Chemistry
Food cans are coated with tin and not with zinc because

Zinc is less reactive than tin
Zinc is costlier than tin
Zinc has a higher melting point than tin
Zinc is more reactive than tin

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