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Chemistry

Chemistry
The depletion of ozone layer is due to

Ethane
Chloro fluoro carbon
Carbon dioxide
Sulphur dioxide

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Chemistry
1 carat of diamond is equal to

200 mg
200 g
100 g
100 mg

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Chemistry
The items amenable to detection by soft x-rays are

contrabands
narcotics
lead in bullets
genuine coins from counterfeit coins

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Chemistry
"Paramagnetism" is the property of

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

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Chemistry
A colloidal system in which a liquid is dispersed in a liquid is called

Sol
Emulsion
Gel
Precipitate

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Chemistry
Which of the following is a man-made source of air pollution ?

Automobile exhaust
All of these
Bacterial action in soil and swamp areas
Forest fire

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