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Q. No.The correct statement/s among the following is/are:
| A. | Kohlrausch's law of independent migration of ions is applicable for strong electrolytes only. |
| B. | At equilibrium state, \(E_{cell}^{o}\) = 0. |
| C. | For the spontaneous cell reaction Ecell > 0 and \(\Delta_rG < 0 \). |
| 1. | Only A | 2. | B and C |
| 3. | Only C | 4. | A, B and C |
Subtopic: Kohlrausch Law & Cell Constant |
51%
From NCERT
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For a given cell, a 0.1 molar solution has a resistance of \(20 \ \Omega\) and molar conductivity of \(0.154 \times 10^{-3} S~cm^2~mol^{-1} \).
The value of the cell constant is:
The value of the cell constant is:
| 1. | \(3.08 \times 10^{-7} cm^{-1}\) | 2. | \(30.8 \times 10^{-7} cm^{-1}\) |
| 3. | \(0.308 \times 10^{-9} cm^{-1}\) | 4. | \(4.08 \times 10^{-6} cm^{-1}\) |
Subtopic: Conductance & Conductivity |
77%
From NCERT
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What is the nearest integer value of \(x\) for the Gibbs free energy change at 298 K, expressed as \(x×10^{−1}~kJ mol^{−1}\) for the given reaction.
\(Cu(s)+Sn^{2+}(0.001 M)\rightarrow Cu^{2+}(0.01M)+Sn(s) \)
Given: \(\small{E^\ominus_{Cu^{2+}/Cu}=0.34~V;~E^\ominus_{Sn^{2+}/Sn}=-0.14~V;~F=96500~C~mol^{-1}}\)
1. 873
2. 983
3. 1002
4. 911
Subtopic: Relation between Emf, G, Kc & pH |
From NCERT
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What is Eº for the oxidation of mercury(I) ion by silver ion?
2 Ag+(aq) + Hg22+(aq) → 2 Ag(s) + 2 Hg2+(aq)
2 Ag+(aq) + Hg22+(aq) → 2 Ag(s) + 2 Hg2+(aq)
|
Half-reaction |
Eº, V |
|
Ag+(aq) + e¯ → Ag(s) |
+0.80 |
|
2 Hg2+(aq) + 2e¯ → Hg22+(aq) |
+0.91 |
| 1. | –0.11 V | 2. | 0.69 V |
| 3. | 1.71 V | 4. | 2.51 V |
Subtopic: Electrode & Electrode Potential |
70%
From NCERT
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The variation of molar conductivity with the concentration of an electrolyte (X) in an aqueous solution is shown in the given figure.
The electrolyte X is:
| 1. | CH3COOH | 2. | KNO3 |
| 3. | HCl | 4. | NaCl |
Subtopic: Kohlrausch Law & Cell Constant |
92%
From NCERT
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| Assertion (A): | Equilibrium constant of the reaction can be calculated from the corresponding \(\text E^{\circ}_{\text {value}},\) of the cell. |
| Reason (R): | Higher the value of \(\text E^{\circ}_{\text {cell}},\) smaller is the value of equilibrium constant. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Relation between Emf, G, Kc & pH |
63%
From NCERT
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Select the incorrect statement among the following:
| 1. | When the concentration of electrolyte approaches zero, the molar conductivity is known as limiting molar conductivity. |
| 2. | The value of constant 'A' in \(\Lambda_m=\Lambda_m^0-A c^{1 / 2}\) is independent of solvent and temperature for a given electrolyte. |
| 3. | The values of constant 'A' for NaCl and KCl are the same. |
| 4. | The variation of \(\Lambda_\text m\) for strong and weak electrolytes in a given solvent and temperature are different. |
Subtopic: Conductance & Conductivity |
64%
From NCERT
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In the electrochemical cell:
Ni(s) | Ni2+ (1M) || Cu2+ (1M) | Cu(s) the emf of cell is E1. When the concentration of Ni2+ and Cu2+ are changed to 0.01 M, the emf changes to E2. From the following which one is the correct relationship between E1 and E2?
Ni(s) | Ni2+ (1M) || Cu2+ (1M) | Cu(s) the emf of cell is E1. When the concentration of Ni2+ and Cu2+ are changed to 0.01 M, the emf changes to E2. From the following which one is the correct relationship between E1 and E2?
| 1. | E1 > E2 | 2. | E1 < E2 |
| 3. | E1 = E2 | 4. | E1 = 0 \(\neq\) E2 |
Subtopic: Nernst Equation |
82%
From NCERT
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Standard electrode potential of three metals X, Y and Z are -1.2 V, +0.5 V and -3.0 V respectively. The reducing power of these metals will be:
| 1. | Y > X > Z | 2. | Z > X > Y |
| 3. | X > Y > Z | 4. | Y > Z > X |
Subtopic: Electrode & Electrode Potential |
82%
From NCERT
AIPMT - 2011
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
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NEET 2025 - Target Batch
The concentration of solution will change when it is placed in a container which is made of:
| 1. | Al | 2. | Cu |
| 3. | Ag | 4. | None |
Subtopic: Electrochemical Series |
73%
From NCERT
AIPMT - 1998
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
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NEET 2025 - Target Batch
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