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Q. No.Given below are two statements:
Assertion (A):
The conductivity of a solution decreases with dilution.
Reason (R):
Conductivity of a solution depends on the number of ions and the number of ions
decreases when the solution is diluted.
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.
(A) is false but (R) is true.
decreases when the solution is diluted.
Subtopic: Conductance & Conductivity |
69%
From NCERT
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| Statement 1: | The standard electrode potential of the system Mg2+ | Mg can be measured with respect to hydrogen electrode. |
| Statement 2: | The standard electrode potential for hydrogen electrode is zero. |
1. Statement 1 is true, statement 2 is false.
2. Statement 1 is false, statement 1 is true.
3. Both statements are true.
4. Both statements are false.
Subtopic: Electrode & Electrode Potential |
86%
From NCERT
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The correct statement regarding dry cells among the following is:
| a. | It is also known as the Leclanche cell. |
| b. | The electrolyte is a moist paste of ammonium chloride (NH4Cl) and zinc chloride (ZnCl2 ). |
| c. | The cathodic reaction is : MnO2 + NH4++ e-→ MnO(OH) + NH3 |
| 1. | Only a and b are correct | 2. | Only c is correct |
| 3. | Only b and c are correct | 4. | All are correct |
Subtopic: Batteries & Salt Bridge |
76%
From NCERT
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Consider the following graph of molar conductivity of KCl solution at different concentrations.
The value of limiting molar conductivity for KCl is 150.0 S cm2 mol-1. The value of the slope at point A will be :
| 1. | 120 | 2. | 100 |
| 3. | 110 | 4. | None of the above |
Subtopic: Kohlrausch Law & Cell Constant |
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Consider the following graph.
The strong electrolyte in the above graph is represented by:
1. X
2. Y
3. Both X and Y
4. Data given is not sufficient to predict.
Subtopic: Conductance & Conductivity |
82%
From NCERT
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The incorrect statement(s) among the below is/are:
| a. | The unit of conductivity is S cm-2 |
| b. | Specific Conductivity of weak and strong electrolytes always decreases with a decrease in concentration. |
| c. | The unit of molar conductivity is S cm2 mol-1 |
| d. | Molar conductivity increases with an increase in concentration. |
1. a
2. a and d
3. b and d
4. a and c
Subtopic: Conductance & Conductivity |
57%
From NCERT
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| Assertion (A): | Copper sulphate can be stored in a zinc vessel. |
| Reason (R): | Zinc is less reactive than copper. |
| 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: Electrochemical Series |
67%
From NCERT
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Given below are two statements:
| Assertion (A): | EAg+/ Ag increases with an increase in the concentration of Ag+ ions. |
| Reason (R): | EAg+/ Ag has a positive value. |
| 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: Electrode & Electrode Potential |
From NCERT
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Given below are two statements:
| Assertion (A): | Current stops flowing when Ecell = 0. |
| Reason (R): | Equilibrium of the cell reaction is attained. |
| 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: Electrolytic & Electrochemical Cell |
88%
From NCERT
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Given below are two statements:
| Assertion (A): | For measuring the resistance of an ionic solution an AC source is used. |
| Reason (R): | Concentration of ionic solution will change if DC source is used. |
| 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. | (A) is false but (R) is true. |
Subtopic: Electrode & Electrode Potential |
64%
From NCERT
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