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Chemistry

Chemistry
Ozone depletion in the stratosphere is mainly caused by

NO2
Chlorogluorocarbons
SO2
NO

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Chemistry
The depletion in Ozone layer is caused by ________ .

Chlorofluorocarbons
Nitrous oxide
Carbon dioxide
Methane

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Chemistry
The polymerisation of which often following is used in manufacturing of polythene in industry ?

Acetylene
Ethylene
Methane
Styrene

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Chemistry
The gas produced in marshy places due to decomposition of vegetation is

Methane
Carbon monoxide
Sulphur dioxide
Carbon dioxide

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Chemistry
Physico-chemical characteristics of water in water sources undergo changes due to

Auatic fungi
Evapotranspiration
Aquatic macrophytes
Effluents

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Chemistry
The luster of a metal is due to

its chemical inertness
presence of free electrons
its high density
its high polishing

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