When $H_{2} S$ gas is passed through the blue solution of $C u S O_{4}$ , a black precipitate of copper sulphide is obtained and the sulphuric acid formed remains in the solution. The reaction is an example of:

a combination reaction

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a displacement reaction

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a decomposition reaction

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a double displacement reaction

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Solution

The correct option is D
a double displacement reaction

$C u S O_{4} (a q)$ + $H_{2} S (g) \to C u S (p p t)$ + $H_{2} S O_{4} (a q)$ .
In this reaction, the ions exchange, this is a double displacement reaction.

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Similar questions

The reaction, Zn + 2HCl → ZnCl₂+ H₂is an example of:

{AgNO}_{3} (aq) + NaCl (aq) \to AgCl (s) + {NaNO}_{3} (aq)

$B a C l_{2} + H_{2} S O_{4} \to B a S O_{4} ↓ + 2 H C l$ .
The reaction given above is an example of:

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