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Chemistry

Chemistry
The gas which turns into liquid at the lowest temperature among the following is

Helium
Nitrogen
Oxygen
Hydrogen

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Chemistry
The high reactivity of fluorine is due to

small size of fluorine atom
availability of d-orbitals
its high electro negativity
strong F - F bond

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Chemistry
Which is a natural colloid ?

Sodium chloride
Blood
Cane-sugar
Urea

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Chemistry
Wood spirit is

Butyl alcohol
Propyl alcohol
Ethyl alcohol
Methyl alcohol

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Chemistry
The number of g-molecule of oxygen in 6.02 x 1024CO molecules is

5 gram of molecule
1 gram of molecule
10 gram of molecule
0.5 gram of molecule

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Chemistry
Combustion of a candle is a/an

Photochemical reaction
Exothermic reaction
Endothermic reaction
Physical change

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MORE MCQ ON Chemistry

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