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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 Y 2?(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?
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 Y 2?
(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?
CBSE | Chemical Reactions and Equations | Chemistry | Class 10 | Lakhmir Singh
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 Y 2?
(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?

(a) Metal X is Copper (Cu) which is red-brown in colour and does not react with dilute acids.

(b) Colorless gas Y2 is Hydrogen (H2).

(c) Compound XO, a black metal compound is a Copper oxide (CuO)

(d) Water (H2O) is the product formed Y2O.

(e) Chemical equation for the reaction involved is:

CuO + H2 →Cu + H2O

(f) Displacement reaction (which is also a redox reaction).Which one active element displaces a less reactive element from its salt solution

i

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