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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Chlorine
Sulphur-di- oxide
Urea
Ammonia

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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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Chemistry
The inexpensive and commonly used variety of glass is called soda glass.

was initially used for storing sodium carbonate
is made using soda lime
was used initially for making bottles of soda(carbonated drink)
is made using soda(sodium carbonate)

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Chemistry
The first organic compound synthesised in the laboratory was

Uric acid
Glucose
Urea
Lactic acid

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Chemistry
The depletion of ozone layer is due to

Sulphur dioxide
Chloro fluoro carbon
Ethane
Carbon dioxide

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Chemistry
Maximum permissible concentration of total hardness in drinking water is

200
50
100
500

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