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Chemistry

Chemistry
Which of the following fibres catches fire least ?

Terricot
Cotton
Rayon
Nylon

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Chemistry
Removal of carbon particles from air involves the principle of

Electrophoresis
Precipitation
Filteration
Sedimentation

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Chemistry
When lime juice is dropped on baking soda, brisk effervescence takes place because the gas evolved is

Oxygen
All of them
Carbon dioxide
Hydrogen

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Chemistry
Nitric acid does not react with

Iron
Gold
Zinc
Copper

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Chemistry
The number of waves in n x 10th Bohr's orbit are

n2
n
n3
n-2

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Chemistry
Coal is formed from

Crude oil
Deposit of animal waste
Compressed and hardened biomass
Coke

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MORE MCQ ON Chemistry

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