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Answer 1

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Secondary SchoolChemistry 5+3 pts

Brown substance 'X' on heating in air forms a substance Y. When hydrogen gas is passed over heated 'Y' it again changes into 'X'.

(I) Name the substances X and Y

(ii) Name the chemical processes occurring during the two changes

(iii) Write the chemical equations.

Report by 1Jaspreet1 11.06.2017

Answers

Sagittarius29

Sagittarius29 Expert

(I) Substance X is 'Copper' and substance Y is 'Copper oxide'.

(ii) The chemical process occurring during the two changes is:-

Oxidation and reduction.

(iii) The chemical equations involved are:-

2Cu (s) + O2 (g) ----> 2CuO

CuO + H2 (g) ----> Cu + H2O

________________________

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Answer 2

X is Copper (Cu).

Y is Copper Oxide (CuO).

The first process is Oxidation while second process is Reduction.

       Equations:-

               2Cu(X) + O2   ---------->   2CuO(black)

              CuO(Y) + H2   ----------->  Cu + H2O

Hope it helped.