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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
Aluminium salt commonly used to stop bleeding is

Aluminium sulphate
Potash alum
Aluminium Chloride
Aluminium nitrate

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Chemistry
Magnalium is an alloy of

Aluminium and Magnesium
Manganese and Magnesium
Magnesium and Tin
Aluminium and Zinc

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Chemistry
The chemical formula of the laughing gas is

NO
NO2
N2O3
N2O

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Chemistry
The chief constituent of vinegar is

Salycylic acid
Acetic acid
Formic acid
Oxalic acid

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Chemistry
Which of the following is not a nitrogenous fertilizer ?

Urea
Ca(CN)2
NH4NO3
CaCN2

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