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Chemistry

Chemistry
Which one of the following is a micro-element ?

Hydrogen
Nitrogen
Chlorine
Oxygen

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Chemistry
In a period from Li to F, ionisation potential

Cannot be predicted
Decreases
Remains same
Increases

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Chemistry
The function of skimming tank in sewage treatment is to remove

Oil and fatty substances
Suspended solids
Gritty substances
Inorganic substances

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Chemistry
By-product obtained by soap industry is

Naphthalene
Caustic potash
Glycerol
Caustic soda

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Chemistry
CNG used in automobiles to check pollution, mainly consists of

N2
H2
CO2
CH4

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Chemistry
The inert gases are ____ in water

insoluble
None of these
soluble
sparingly soluble

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