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Chemistry

Chemistry
The sewage obtained from water closets and urinals is known as

Sullage
Sanitary waste
Industrial waste
Garbage

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Chemistry
Acid rain' is caused due to air - pollution by

Methane
Nitrous oxide and sulphur dioxide
Carbon monoxide
Carbon dioxide

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Chemistry
A thick paste of cement, sand and water is called

Mortar
Concrete
R.C.C.
Kiln

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Chemistry
Basicity of boric acid, H3BO3 is

5
4
3
2

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Chemistry
The main active constituent of tea and coffee is

aspirin
chlorophyll
nicotine
caffeine

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

Urea
Sulphur-di- oxide
Ammonia
Chlorine

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