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Q. No.
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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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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Given the standard reduction potentials, identify the correct statement among the following:
1. Cr(s) will react with acid
2. Cu(s) will react with acid
3. Cu2+(aq) will react with acid
4. Cu(s) will react with Cr3+(aq)
| Cu2+(aq) + 2e- → Cu(s) Eº = 0.34 V 2H+(aq) + 2e- → H2(g) Eº = 0.00 V Cr3+(aq) + 3e- → Cr(s) Eº = -0.73 V |
1. Cr(s) will react with acid
2. Cu(s) will react with acid
3. Cu2+(aq) will react with acid
4. Cu(s) will react with Cr3+(aq)
Subtopic: Electrode & Electrode Potential |
58%
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 molar conductance of an electrolyte increases with dilution according to the equation:
\(\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{A} \sqrt{\mathrm{c}} \)
Consider the following four statements:
Which of the above statements are correct?
\(\Lambda_{\mathrm{m}}=\Lambda_{\mathrm{m}}^{\circ}-\mathrm{A} \sqrt{\mathrm{c}} \)
Consider the following four statements:
| A: | This equation applies to both strong and weak electrolytes. |
| B: | The value of the constant A depends upon the nature of the solvent. |
| C: | The value of constant A is the same for both \(BaCl_2\) and \(MgSO_4\) |
| D: | The value of constant A is the same for both \(BaCl_2\) and \(Mg(OH)_2\) |
| 1. | (A) and (B) only | 2. | (A), (B), and (C) only |
| 3. | (B) and (C) only | 4. | (B) and (D) only |
Subtopic: Conductance & Conductivity |
57%
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | In equation \(\Delta_{\mathrm{r}} \mathrm{G}=-\mathrm{nFE} _{\text {cell }}, \) value \(\mathrm{\Delta_rG }\) depends on n. |
| Reason (R): | \(\mathrm{E_{cell} }\) is an intensive property and \(\mathrm{\Delta_rG }\) is an extensive property. |
| 1. | (A) is False but (R) is True. |
| 2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are True and (R) is not the correct explanation of (A). |
| 4. | (A) is True but (R) is False. |
Subtopic: Relation between Emf, G, Kc & pH |
59%
From NCERT
NEET - 2023
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
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NEET 2025 - Target Batch
| Statement I: | Corrosion of metals considered as an electrochemical phenomenon. |
| Statement II: | Mg and Zn can be used as sacrificial electrodes during the corrosion of iron the electrode. |
In light of the above statement, choose the correct option among the following:
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Statement I is incorrect but Statement II is correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Both Statement I and Statement II are correct. |
Subtopic: Corrosion |
73%
From NCERT
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The molar conductance of acetic acid is \(40~ \text S~\text {cm}^2 ~\text {mol}^{-1} \). If the dissociation constant is \(1 \times 10^{-5} \), then the concentration of acetic acid is:
\(\left (\Lambda_{\mathrm{NaAc}}^o=90 \mathrm{~S} \mathrm{~cm}^2 / \mathrm{mol} ~,{\mathrm{\Lambda^o_{NaCl}}}=120 \mathrm{~S} \mathrm{~cm}^2 / \mathrm{mol}\right. \) and \(\wedge_{HCl}^{o} = 430 \ S \ cm^{2} \ mol^{-1}) \)
1. \(9 \times 10^{-4}~ \text {mol} ~\text L^{-1} \)
2. \(9 \times 10^{-3}~ \text {mol} ~\text L^{-1} \)
3. \(400 ~\text {Scm}^2 ~\text {mol}^{-1} \)
4. \(40 ~\text {Scm}^2 ~\text {mol}^{-1} \)
\(\left (\Lambda_{\mathrm{NaAc}}^o=90 \mathrm{~S} \mathrm{~cm}^2 / \mathrm{mol} ~,{\mathrm{\Lambda^o_{NaCl}}}=120 \mathrm{~S} \mathrm{~cm}^2 / \mathrm{mol}\right. \) and \(\wedge_{HCl}^{o} = 430 \ S \ cm^{2} \ mol^{-1}) \)
1. \(9 \times 10^{-4}~ \text {mol} ~\text L^{-1} \)
2. \(9 \times 10^{-3}~ \text {mol} ~\text L^{-1} \)
3. \(400 ~\text {Scm}^2 ~\text {mol}^{-1} \)
4. \(40 ~\text {Scm}^2 ~\text {mol}^{-1} \)
Subtopic: Conductance & Conductivity |
62%
From NCERT
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