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CHEMISTRY

Chemistry
Which one of the following nonmetals shows allotropy in the liquid state?

Carbon
Phosphorous
Sulphur
Bromine

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Chemistry
Sulphuric acid is

Dibasic
Tetrabasic
Monobasic
Tribasic

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Chemistry
When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to

NO2
SO3
SO2
N2O

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Chemistry
Wax used for making candle is chemically a mixture of

Aromatic hydrocarbons
Cyclic hydrocarbons
Aliphatic and aromatic hydrocarbons
Aliphatic hydrocarbons

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Chemistry
Adding Cl2 to benzene in the presence of AlCl3 is an example of :

Addition reaction
Substitution reaction
None of the options
Elimination reaction

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