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Chemistry

Chemistry
An example of replenishable energy source is–

Lignite
Biomass
Petroleum
Coal

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Chemistry
Which gas is used for converting vegetable oils into saturated fats ?

H2
O2
Cl2
SO2

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

Chlorine
Nitrogen
Hydrogen
Oxygen

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Chemistry
Two electrons in an orbital are differentiated by which of the following ?

Magnetic quantum number
Spin quantum number
Azimuthal quantum number
Principal quantum number

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Chemistry
The function of sedimentation tank in sewage treatment is to:

Disinfect the sewage
Remove water content
Remove suspended solids
Aerate the sewage

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Chemistry
Type metal used in printing press is an alloy of

Lead and copper
Lead and bismuth
Lead and zinc
Lead and antimony

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