A reddish brown vessel developed a …

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A reddish brown vessel developed a green coloured solid X when left open in air for a long time . When reacted with dilute hydrochloric, it forms a blue coloured solution along with brisk effervescence due to colourless and odourless gas z .X decomposes to form black coloured oxide y of a reddish brown metal along with gas z . Identify X,y and z

Posted by Kunal Saini 7 years, 2 months ago

CBSE > Class 10 > Science

1 answers

Chandan Chandu 4 years, 11 months ago

X is Copper Carbonate Y is Copper Oxide Z is Carbon dioxide Explanation: When left in the open air for some time, a vessel of copper which is reddish brown in color combines with carbon dioxide and also the moisture in the environment to form a green coating. This green coating is copper carbonate which is basic in nature. On reacting with dilute , copper carbonate forms a blue colored solution. This solution is that of copper sulphate and a colorless and odorless gas which is carbon dioxide . On decomposition, copper carbonate forms copper oxide (CuO) which is black in color. It also decomposes to form carbon dioxide.

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CBSE > Class 10 > Science