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Mark out the correct statement among the...

Mark out the correct statement among the following.

A

Aqueous `AgNO_(3)` solution can be stored in a copper bowl.

B

Aqueous `CuSO_(4)` solution can be stored in a silver bowl.

C

`Cu, Ag` can release hydrogen gas from dil HCl.

D

`H_(2)` cannot reduce `Cu^(2+) and Ag^(+)` in the form of metals.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question of identifying the correct statement among the given options, we will analyze each statement based on the standard reduction potentials of the metals involved. ### Step-by-Step Solution: 1. **Evaluate Statement 1: "Aqueous AgNO3 solution can be stored in a copper bowl."** - **Analysis:** - The standard reduction potential for copper (Cu) is +0.34 V, and for silver (Ag) it is +0.22 V. - Since copper has a higher reduction potential than silver, it is more reactive. Therefore, if AgNO3 is stored in a copper bowl, copper will displace silver from the solution. - **Conclusion:** This statement is incorrect. 2. **Evaluate Statement 2: "Aqueous copper sulphate solution can be stored in a silver wall."** - **Analysis:** - Since copper is more reactive than silver, silver cannot displace copper from copper sulfate solution. - The standard reduction potential of copper is higher than that of silver, which supports that silver will not react with copper sulfate. - **Conclusion:** This statement is correct. 3. **Evaluate Statement 3: "Copper can release hydrogen gas from dilute HCl."** - **Analysis:** - For a metal to displace hydrogen from HCl, it must have a lower standard reduction potential than hydrogen (0.00 V). - Copper has a higher reduction potential (+0.34 V) than hydrogen, meaning it cannot displace hydrogen from HCl. - **Conclusion:** This statement is incorrect. 4. **Evaluate Statement 4: "H2 cannot reduce Cu²⁺ and Ag⁺ to metal."** - **Analysis:** - Hydrogen has a standard reduction potential of 0.00 V, while both copper (+0.34 V) and silver (+0.22 V) have higher potentials. - This means that hydrogen cannot reduce Cu²⁺ or Ag⁺ ions to their respective metals. - **Conclusion:** This statement is also incorrect. ### Final Conclusion: After evaluating all the statements, we find that **Statement 2** is the correct one: "Aqueous copper sulphate solution can be stored in a silver wall." ---
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