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Chemistry

Chemistry
Threshold limit value of copper in the atmospheric air is

1.0 mg/m3
5.0 mg/m3
0.001 mg/m3
0.01 mg/m3

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Chemistry
The atmospheric gas that is mainly responsible for Green House effect :

Carbondioxide
Ozone
Nitrogen
Oxygen

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Chemistry
Ethanol containing 5% water is known as

Denatured spirit
Methylated alcohol
Rectified spirit
Power alcohol

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Chemistry
Which of the following is the major constituent of LPG?

Methane
Propane
Butane
Ethane

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Chemistry
The acid which is secreted by the glands in the stomach wall is

Nitric acid
Sulphuric acid
Hydrochloric acid
Phosphoric acid

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Chemistry
Which metal is the heaviest in periodic table among the following ?

Pt
W
Pb
Os

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