AP EAMCET202421 May 2024Evening ShiftChemistryElectrochemistryActual
The standard reduction potentials of 2 H ⁺ / H ₂, Cu ²⁺ / Cu , Zn ²⁺ / Zn and NO ₃⁻, H ⁺ / NO are 0.0,0.34,-0.76 and 0.97 V pespectively. Identify the correct statements from the following I. H ⁺ does not oxidize Cu to Cu ²⁺ II. Zn reduces Cn ²⁺ to Cu III. NO ₃⁻ oxidizes Cu to Cu ²⁺
Options
- AI, II only
- BI, II, III
- CI, III only
- DII, III only
Correct answer
B. I, II, III
Step-by-step solution
The greater the negative value of the reduction potential value in the electrochemical series, the greater will be the tendency to act as a reducing agent it mean it can reduce other element whose value is high. array ll Zn ²⁺ / Zn & -0.76 V 2 H ⁺ / H ₂ & 0 V Cu ²⁺ / Cu & 0.34 V NO ₃⁻ / H ⁺ / NO & 0.97 V array Zinc acts as a good reducing agent than copper. This implies that zinc can reduce copper. 2 H ⁺ / H ₂ cannot oxides Cu / Cu ²⁺ because it have lower reduction potential then copper. NO ₃⁻ have high reduction