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krishantayal
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Asked: 2021-06-11T11:37:53+00:00 In:

Which one of the following processes involve chemical reactions ?

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0%(a) Storing of oxygen gas under pressure in a gas cylinder.
0%(b) Liquefaction of air.
0%(c) Keeping petrol in a china dish in the open.
100%(d) Heating copper wire in presence of air at high temperature. ( 15 voters )
Based On 15 Votes

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    2 Answers

    1. (d) Heating copper wire in presence of air at high temperature.

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    2. Best Answer

      [D] heating copper wire in the presence of air at high temperature
      A chemical reaction is a change in which one or more substance or reactants react to form new substance with entirely different properties. Heating of copper in presence of air at high temperature gives copper oxide. Such as:
      2Cu + O₂ → 2CuO

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