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Chemistry

Chemistry
Heating of a ore below its melting point in the absence of air is known as

Smelting
Calcination
Roasting
Refining

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Chemistry
The hottest part of the gas flame is known as

non-luminous zone
dark zone
luminous zone
blue zone

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Chemistry
The gas produced in marshy places due to decomposition of vegetation is

Methane
Carbon dioxide
Sulphur dioxide
Carbon monoxide

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

Indane gas
Coal gas
Water gas
Natural gas

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Chemistry
Number of neutrons in an atom of hydrogen is

Three
One
Two
Zero

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Chemistry
Vinegar is ________ .

Diluted acetic acid
Glacial formic acid
Glacial acetic acid
Diluted formic acid

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MORE MCQ ON Chemistry

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