19,000+ solved questions for JEE Advanced, JEE Mains, NEET & IChO — with answers and expert explanations.
On the basis of information available from the reaction 4Al + 3O2 →2Al2O3; ∆G = – 965 kJ/mol of O2.The minimum EMF required to carry out electrolysis of Al2O3 is
A 1.0 M with respect to each of the metal halide AX3, BX2 CX3 and DX2 is electrolysed using platinum electrodes. If The correct sequence in which the various metals are deposited at the cathode is
Assertion: Zinc can be used while copper cannot be used in the recovery of Ag from the complex [Ag(CN)2]– Reason: Zinc is powerful reducing agent than copper.
Two students use same stock solution of ZnSO4 but different solutions of CuSO4. The EMF of one cell is 0.03 V higher than the other. The concentration of CuSO4 in the cell with higher EMF value is 0.5 M. The concentra…
When metallic copper is shaken with a solution of a copper salt, the reaction proceeds. When equilibrium is established at 298 K, [Cu2+]/[Cu+]2 = 1.667 × 106 M–1. If the standard potential of the Cu2+ | Cu half-cell i…
The reduction potential at 25oC for Fe3+|Fe2+ electrode is +0.718 V. If , the ratio of molar concentrations of Fe2+ to Fe3+ ions in solution is (2.303RT/F = 0.06, log 5 = 0.7)
A 1.0 M with respect to each of the metal halide AX3, BX2 CX3 and DX2 is electrolysed using platinum electrodes. If The correct sequence in which the various metals are deposited at the cathode is
Assertion: Zinc can be used while copper cannot be used in the recovery of Ag from the complex [Ag(CN)2]– Reason: Zinc is powerful reducing agent than copper.
For the process: Cu2+ + 2e– → Cu; log[Cu2+] vs. Ered graph is shown in the figure, where OA = 0.34 V. The electrode potential of the half-cell of Cu|Cu2+ (0.1 M) will be [2.303 RT/F = 0.06]
Which graph correctly correlates Ecell as a function of concentrations for the cell Zn(s) + 2Ag+(aq) Zn2+(aq) + 2Ag(s), E°cell = 1.56 V Y-axis : Ecell, X-axis : log10 (a) (b) (c) (d)
The e.m.f. of a Daniell cell at 298K is When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f. changed to E2. What is the relationship between E1 and E2?
On the basis of information available from the reaction 4Al + 3O2 →2Al2O3; ∆G = – 965 kJ/mol of O2.The minimum EMF required to carry out electrolysis of Al2O3 is
Two students use same stock solution of ZnSO4 but different solutions of CuSO4. The EMF of one cell is 0.03 V higher than the other. The concentration of CuSO4 in the cell with higher EMF value is 0.5 M. The concentra…
When metallic copper is shaken with a solution of a copper salt, the reaction proceeds. When equilibrium is established at 298 K, [Cu2+]/[Cu+]2 = 1.667 × 106 M–1. If the standard potential of the Cu2+ | Cu half-cell i…
The reduction potential at 25oC for Fe3+|Fe2+ electrode is +0.718 V. If , the ratio of molar concentrations of Fe2+ to Fe3+ ions in solution is (2.303RT/F = 0.06, log 5 = 0.7)
Two students use same stock solution of ZnSO4 but different solutions of CuSO4. The EMF of one cell is 0.03 V higher than the other. The concentration of CuSO4 in the cell with higher EMF value is 0.5 M. The concentra…
Assertion: Zinc can be used while copper cannot be used in the recovery of Ag from the complex [Ag(CN)2]– Reason: Zinc is powerful reducing agent than copper.
A 1.0 M with respect to each of the metal halide AX3, BX2 CX3 and DX2 is electrolysed using platinum electrodes. If The correct sequence in which the various metals are deposited at the cathode is
On the basis of information available from the reaction 4Al + 3O2 →2Al2O3; ∆G = – 965 kJ/mol of O2.The minimum EMF required to carry out electrolysis of Al2O3 is
The e.m.f. of a Daniell cell at 298K is When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f. changed to E2. What is the relationship between E1 and E2?
Which graph correctly correlates Ecell as a function of concentrations for the cell Zn(s) + 2Ag+(aq) Zn2+(aq) + 2Ag(s), E°cell = 1.56 V Y-axis : Ecell, X-axis : log10 (a) (b) (c) (d)
For the process: Cu2+ + 2e– → Cu; log[Cu2+] vs. Ered graph is shown in the figure, where OA = 0.34 V. The electrode potential of the half-cell of Cu|Cu2+ (0.1 M) will be [2.303 RT/F = 0.06]
The reduction potential at 25oC for Fe3+|Fe2+ electrode is +0.718 V. If , the ratio of molar concentrations of Fe2+ to Fe3+ ions in solution is (2.303RT/F = 0.06, log 5 = 0.7)
When metallic copper is shaken with a solution of a copper salt, the reaction proceeds. When equilibrium is established at 298 K, [Cu2+]/[Cu+]2 = 1.667 × 106 M–1. If the standard potential of the Cu2+ | Cu half-cell i…
The e.m.f. of a Daniell cell at 298K is When the concentration of ZnSO4 is 1.0 M and that of CuSO4 is 0.01 M, the e.m.f. changed to E2. What is the relationship between E1 and E2?