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Chemistry

Chemistry
The substance which does not expand on going from liquid state to solid state is

Water
Type metal
Cast-iron
Aluminium

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Chemistry
Smoke is formed due to

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

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Chemistry
The charcoal used to decolourise brown sugar solution is

Animal charcoal
Sugar charcoal
Wood charcoal
Coconut charcoal

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Chemistry
Nitrification is the biological process of converting

Ammonia into N2
N2 into nitrate
N2into nitrite
Ammonia into nitrite

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Chemistry
The compound that has the least value for octane number is :

2,2-dimethyl hexane
2-methyl heptane
Iso-octane
N-heptane

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Chemistry
Petroleum is a mixture of

Hydrocarbons
Elements
Salts
Polymers

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MORE MCQ ON Chemistry

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