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Chemistry

Chemistry
Threshold limit value of copper in the atmospheric air is

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

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Chemistry
Nitrogen forms a variety of compounds in all oxidation states ranging from

–3 to + 6
–3 to + 4
–3 to + 3
–3 to + 5

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Chemistry
Water gas is the combination of

CO and H2
CO2 and CO
CO and H2O
CO2and H2

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Chemistry
Which one of the following is used for dating very old objects of archaeological importance?

Radium
Phosphorus-31
Tritium
Carbon-14

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Chemistry
Ultraviolet radiation striking the earth is due to the depletion of

Carbon dioxide
Ozone
Oxygen
Carbon monoxide

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Chemistry
Find the odd one:

Slaked lime
Chalk
Marble
Limestone

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MORE MCQ ON Chemistry

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