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  • When hydrogen sulphide gas is passed through a blue solution of copper sulphate, the colour of the solution fades and a black precipitate is obtained. (a) Name the type of reaction mentioned above. (b) Why does the colour of the sol

When hydrogen sulphide gas is passed through a blue solution of copper sulphate, the colour of the solution fades and a black precipitate is obtained.

(a) Name the type of reaction mentioned above.

(b) Why does the colour of the solution fade away?

(c) Write the chemical name of the black precipitate formed.

(d) Give the balanced chemical equation for the reaction involved. 

 

 
 
 
 
 

Answers (2)

a. The reaction type mentioned above is double displacement reaction.

b. The color of the solution fade away due to the formation of copper sulfate.

c. The chemical name of the black precipitate formed in the reaction is copper.

d. Below is the balanced chemical reaction involved-

   CuSO4 + H2S  –> CuS + H2SO4

Posted by

Safeer PP

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A) double displacement reaction

B)  the color of the solution fades away due to the formation of copper sulphate

C) black precipitate is copper

D) balanced equation is :

Cuso4 + H2S it gives CuS + H2SO4

 

Posted by

Abisha Agarwal

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