Question

Copper Sulphate solution does not react with –
A. Zinc
B. Iron
C. Silver
D. All of these

Answer 1

For our knowledge, copper sulphate, also referred to as copper sulphate, are the inorganic compounds with the chemical formula $CuS{O_4}\left( {{H_2}O} \right)x$, where $x$ can range from $0$ to $5$. Copper is an important chemical element that is included in some over-the-counter multivitamin and mineral supplements, even though copper deficiency is quite rare and supplementation is rarely needed.

Complete step by step answer:
The normal sulphate that is white in the anhydrous form but blue in the crystalline hydrous form $CuS{O_4}\cdot5{H_2}O$ and that is often used as an algaecide and fungicide is copper sulphate or copper sulphate
Because $Fe,{\text{ }}Zn,{\text{ }}Mg$ are higher in the activity series than copper and a metal higher in the activity series displaces the lower solutions and thus these would react with $CuS{O_4}$ but $Ag$ is lower in the series than $Cu$ thus it cannot displace $Cu$ from the salt.
$CuS{O_4}reacts{\text{ }}with{\text{ }}Zn{\text{ }}and{\text{ }}Fe{\text{ }}placed{\text{ }}above{\text{ }}i{t_{}}$
$CuS{O_{4\;}}\; + Fe \to FeS{O_4}\;\; + Cu$
$CuS{O_{4\;}}\; + Zn \to ZnS{O_4}\; + C{u_{}}$
$CuS{O_{4\;}}\;does{\text{ }}not{\text{ }}react{\text{ }}with{\text{ }}Ag,{\text{ }}placed{\text{ }}below{\text{ }}it.$
$CuS{O_{4\;}} + Ag,no{\text{ }}reaction.$

Hence, the correct answer is C.

Note: We should remember that in activity series silver is placed below the copper. Hence copper is more reactive than silver. The more reactive element can displace the less reactive element from its solution. A sulphate of bivalent copper that is best known as the blue crystalline hydrate $CuS{O_4}\cdot5{H_2}O$, is used as an algaecide and fungicide, and has been used medicinally in solution as an emetic but isn’t now recommended for such use due to its potential toxicity. Copper sulphate is widely used as a fungicide, either alone or in association with other fungicides (maneb, zineb), for the treatment of orchards and vineyards. It is sprinkled in the form of a solution at about 1 %, and in far more concentrated solutions if spread by planes.