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Chemistry

Chemistry
Which one of the following gases has the highest calorific value?

Water gas
Coal gas
Indane gas
Natural gas

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Chemistry
The main source of carbon monoxide is

Transportation
Solid waste disposal
Industrial process
Fuel combustion

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Chemistry
Setting of plaster of paris involves

Dehydration process
Reduction process
Oxidation process
Hydration to form other hydrates

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

SO3
NO2
SO2
N2O

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Chemistry
Which one of the following chemicals helps in fruit ripening?

Ethephon
Isoproturan
Atrazine
Malathion

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Chemistry
The most electronegative element among the following is

bromine
sodium
fluorine
oxygen

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