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 |
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. |
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 1 and Statement 2 are true. |
4. | Both Statements 1 and Statement 2 are false. |
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 |
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.
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)
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. |
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. |
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. |
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. |