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Chemistry

Chemistry
A mixture of water and alcohol can be separated by

Filtration
Distillation
Evaporation
Decantation

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Chemistry
For extinguishing fire, we use

Marsh gas
Hydrogen
Carbon Dioxide
Carbon Monoxide

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Chemistry
Threshold limit value of copper in the atmospheric air is

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

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Chemistry
________ is used for making vinegar.

Acetic acid
Malic acid
Oxalic acid
Tartaric acid

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Chemistry
Colour imparted to the Bunsen flame by strontium salt is

Crimson red
Brick red
Bluish green
Apple-green

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Chemistry
Forth floatation process to concentrate the minerals is applicable to

Haematite
Chalcopyrites
Calamine
Bauxite

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