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Chemistry

Chemistry
The depletion of ozone layer is due to

Sulphur dioxide
Chloro fluoro carbon
Ethane
Carbon dioxide

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Chemistry
The most abundant element by number in the living system is :

Oxygen
Nitrogen
Hydrogen
Carbon

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Chemistry
The chief source of naphthalene is

Diesel
Coal-tar
Charcoal
Camphor

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Chemistry
The wire of flash bulbs is made up of

Cu
Ag
Mg
Ba

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Chemistry
"Paramagnetism" is the property of

Completely vacant electronic subshells
Paired electrons
Completely filled electronics subshells
Unpaired electrons

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Chemistry
Hard water and soft water can be distinguished by using

Dilute acid
Ordinary soap
Liquid soap
Detergent

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MORE MCQ ON Chemistry

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