Q. No.
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.
| Assertion (A): | Copper sulphate solutions can be store in a zinc pot. |
| Reason (R): | Zinc is more 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. | (A) is false but (R) is true. |
(Given: \(E_{Fe^{2+}/Fe^{+3}}^{o}\)=−0.77 V, \(E_{F_{2}/F^{-}}^{o}\)=2.87 V, \(E_{Cl_{2}/Cl^{-}}^{o}\) = 1.36 V, \(E_{O_{2}/H_{2}O}^{o}\) = 1.23V)
1. F2
2. Cl2
3. O2
4. All of the above
The potential of hydrogen electrode in contact with a solution with pH =10, is -
1. −0.0591 V
2. −5.91 V
2. 0.0591 V
4. −0.591 V
The emf of the cell in which the following reaction takes place is:
Ni(s)+2Ag+(0.002 M) →Ni2+(0.160 M) + 2Ag(s)
( Given that \(E_{cell}^{o}\)= 1.05 V)
1. Ecell= 9.14 V
2. Ecell= 0.0914 V
3. Ecell= 0.00914 V
4. Ecell= 0.914 V
The cell in which the following reactions occurs:
2Fe3+(aq)+2I-(aq)→2Fe2+(aq)+I2(s) has \(E_{cell}^{o}\)= 0.236 V at 298 K.
The standard Gibbs energy of the cell reaction is -
1. 41.14 kJ mol−1
2. 45.54 kJ mol−1
3. −49.94 kJ mol−1
4. −45.54 kJ mol−1
| 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. |
The molar conductivity of 0.025 mol L−1 methanoic acid is 46.1 S cm2 mol−1.
The dissociation constant of methanoic acid is-
Given λ°(H+)= 349.6 S cm2 mol−1 and λ°(HCOO−) = 54.6 S cm2 mol
1. \(1.27×10^{-4}mol ~L^{−1}\)
2. \(5.17×10^{-5}mol ~L^{−1}\)
3. \(3.67×10^{-4}mol ~L^{−1}\)
4. \(4.87×10^{-5}mol ~L^{−1}\)
The number of electrons flow through the wire when a current of 0.5 ampere flows through a metallic wire for 2 hours, is-
1. \(6.25×10^{22}\)
2. \(2.25×10^{22}\)
3 \(8.25×10^{22}\)
4. \(4.25×10^{22}\)
The metals among the following that can be extracted electrolytically is -
1. K
2. Na
3. Al
4. All of the above
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