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Chemistry

Chemistry
Threshold limit value of copper in the atmospheric air is

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

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Chemistry
The chemical formula of the laughing gas is

NO
NO2
N2O3
N2O

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Chemistry
Bhopal gas tragedy is associated with leakage of

Nitrogen dioxide
Methyl isocyanate
Sulphur dioxide
Carbon dioxide

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Chemistry
Choose the incorrect statement pertaining to organic compounds

They have low melting and boiling points
They do not dissolve in water
They are not easily combustible
They contain mainly carbon and hydrogen

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Chemistry
Sodium bicarbonate is commercially known as

Washing soda
Caustic soda
Soda lime
Baking soda

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Chemistry
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is

Oxygen
Hydrogen
All of them
Carbon dioxide

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