When a black metal compound XO is heated with a colourless gas Y₂, then metal X and another compound Y₂O are formed. Metal X is red-brown in colour which does not react with dilute acids at all. Gas Y₂ can be prepared by the action of a dilute acid on any active metal. The compound Y₂O is a liquid at room temperature which can turn anhydrous copper sulphate blue.
(a) What do you think is metal X?
(b) What could be gas Y₂?
(c) What is compound XO?
(d) What is compound Y₂O?
(e) Write the chemical equation of the reaction which takes place on heating XO with Y₂.
(f) What type of chemical reaction is illustrated in the above equation?

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Solution

(a) The metal X is copper.

(b) The gas Y₂ is H₂.

(c) The compound XO is CuO.

(d) The compound Y₂O is H₂O.

(e) The chemical reaction is given as follows:
CuO + H₂→ Cu + H₂O

(f) The above reaction is a displacement reaction as well as a redox reaction.

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(a) The metal X is copper. (b) The gas Y2 is H2. (c) The compound XO is CuO. (d) The compound Y2O is H2O. (e) The chemical reaction is given as follows: CuO + H2 → Cu + H2O (f) The above reaction is a displacement reaction as well as a redox reaction.

(a) The metal X is copper.

(b) The gas Y₂ is H₂.

(c) The compound XO is CuO.

(d) The compound Y₂O is H₂O.

(e) The chemical reaction is given as follows:
CuO + H₂→ Cu + H₂O

(f) The above reaction is a displacement reaction as well as a redox reaction.