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Chemistry

Chemistry
The smog is essentially caused by the presence of

O2 and O3
O3 and N2
Oxides of N and S
O2 and N2

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Chemistry
The inherited traits of an organism are controlled by

nucleotides
DNA molecules
RNA molecules
enzymes

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Chemistry
Alum is used as

A purifier for water
A fertilizer
An analgesic
A disinfectant

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Chemistry
Smoke is formed due to

Gas dispresed in solid
Solid dispersed in gas
Solid dispresed in liquid
Gas dispersed in gas

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Chemistry
Plastic is a type of

Polyester
Acrylic
Polymer
None of these

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Chemistry
The lightest gas which is non-inflammable is

Nitrogen
Hydrogen
Helium
Oxygen

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