A gas is released when copper reacts with conc. sulphuric acid. The name of the gas released is:
A
Hydrogen sulphide
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B
Sulphur dioxide
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C
Sulphur trioxide
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D
Hydrogen
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Solution
The correct option is B Sulphur dioxide Sulphuric acid gets reduced to sulphur dioxide along with water and oxygen. The equation of the reaction between copper and concentrated sulphuric acid is given below.
Cu+2H2SO4→CuSO4+2H2O+SO2↑
Since there is only one gas that is being produced in this reaction so the answer is sulphur dioxide (SO2).