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Chemistry

Chemistry
The electronic configuration of an atom having atomic number ‘20’ is

2, 6, 8, 4
2, 10, 8
2, 8, 10
2, 8, 8, 2

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Chemistry
The metal present in vitamin B12 is

Mo
Co
Mg
Fe

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Chemistry
Particulates (< 1 µm size) remaining suspended in air indefinitely and transported by wind currents are called

Fumes
Smoke
Aerosols
Mists

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Chemistry
The gas which emits from rice field is

All of these
Nitrogen
Ethane
Methane

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Chemistry
By which organic compound all the oils are known ?

Carbohydrate
Hydrocarbon
Protein
Ester

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Chemistry
Soldering of two metals is possible because of the property of :

Viscosity
Osmosis
Surface tension
Cohesion

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