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CBSE Class 10 Science Question 31 of 45

Solved 2024 Sample Question Paper CBSE Class 10 Science — Question 3

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Question 28(b)

A reddish-brown metal 'X', when heated in air, gives a black compound 'Y', which when heated in presence of H2 gas gives 'X' back. 'X' is refined by the process of electrolysis; this refined form of 'X' is used in electrical wiring.

Identify 'X' and 'Y'. Draw a well-labeled diagram to represent the process of refining 'X'.

Answer

X is Copper [Cu] and in presence of oxygen it forms Y i.e., Copper oxide [CuO].

2Cu + O2 ⟶ 2CuO

A reddish-brown metal 'X', when heated in air, gives a black compound 'Y', which when heated in presence of H2 gas gives 'X' back. 'X' is refined by the process of electrolysis; this refined form of 'X' is used in electrical wiring. Identify 'X' and 'Y'. Draw a well-labeled diagram to represent the process of refining 'X'. CBSE 2024 Science Class 10 Sample Question Paper Solved.