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Chemistry

Chemistry
The mineral containing both magnesium and calcium is

dolomite
magnesite
calcite
carnallite

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Chemistry
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

ozone
oxygen
methane
helium

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Chemistry
Smoke is formed due to

Solid dispersed in gas
Gas dispersed in gas
Gas dispresed in solid
Solid dispresed in liquid

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Chemistry
The name of plastic polymer from which combs, toys, bowls etc., can be made, is

Metallic polysulphides
Polyurethane
Teflon
Polystyrene

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Chemistry
The percentage of Nitrogen in Air is

78.03
85.02
0.94
0.03

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Chemistry
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called

liquation
leaching
levigation
magnetic separation

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MORE MCQ ON Chemistry

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