a) What do you observe when hydrogen is passed over heated copper oxide ?
b) Name the source from which hydrogen is obtained ?
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à)Answer : When hydrogen gas is passed over hot copper oxide, the black coating on the surface turns brown as the reverse reaction takes place and copper is obtained.
b)natural gas
There are four main sources for the commercial production of hydrogen: natural gas, oil, coal, and electrolysis; which account for 48%, 30%, 18% and 4% of the world's hydrogen production respectively. Fossil fuels are the dominant source of industrial hydrogen.
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