The molar conductance of NaCl, HCI, and CH3COONa at infinite dilution are 126.45, 426.16, and 91.0 S cm mol–1 respectively. The molar conductance of CH3COOH at infinite dilution will be:
1. 698.28 S cm2 mol–1
2. 540.48 S cm2 mol–1
3. 201.28 S cm2 mol–1
4. 390.71 S cm2 mol–1
The molar conductivity of 0.007 M acetic acid is 20 S cm2 mol–1. The dissociation constant of acetic acid is :
(\(\mathrm{\Lambda_{H^{+}}^{o} \ = \ 350 \ S \ cm^{2} \ mol^{-1} }\))
(\(\mathrm{\mathrm{\Lambda_{CH_{3}COO^{-}}^{o} \ = \ 50 \ S \ cm^{2} \ mol^{-1} }}\))
1. mol L–1
2. mol L–1
3. mol L–1
4. mol L–1
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 mass of nickel deposited by electrolysis of a solution of using a current of 5 amperes for 20 min is:
(Atomic mass of Nickle is 58.7u)
1. 2.42 g
2. 1.82 g
3. 3.93 g
4. 6.42 g
The value of ∆G° in the reaction below would be:
\(\small{\mathrm{Zn}(\mathrm{s})+\mathrm{Ag}_2 \mathrm{O}(\mathrm{s})+\mathrm{H}_2 \mathrm{O}(\mathrm{l}) \rightarrow \mathrm{Zn}^{+2}(\mathrm{aq})+2 \mathrm{Ag}(\mathrm{s})+2 \mathrm{OH}^{-}(\mathrm{aq})}\)
Given: \(E_{cell}^{\circ} = 1.04V\)
1. –2.13 kJ
2. –21.3 kJ
3. –201 kJ
4. –31.12 kJ
The value of Ecell in the reaction below will be:
\(\small{Pt(s)|Br^{-}(0.010 \ M)|Br_{2}(l) \ ||H^{+}(0.030 \ M)|H_{2}(g)(1 \ bar)|Pt(s)}\)
\(E_{Br^{-}/Br_{2}}^{o} \ = \ -1.09 \ V\)
1. +1.298 V
2. –1.398 V
3. –1.298 V
4. –1.198 V
The electricity required in coulombs for the oxidation of 1 mole of FeO to is:
1. | 964.87 C | 2. | 96487 C |
3. | 96.487 C | 4. | 9.6487 C |
The conductivity of 0.20 M solution of KCl at 298 K is 0.0248 S cm–1. The molar conductivity will be -
1. | 124 S cm2 mol-1 | 2. | 134 S cm2 mol-1 |
3. | 128 S cm2 mol-1 | 4. | 136 S cm2 mol-1 |
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. Only (a)
2. (a) and (d)
3. (b) and (d)
4. (a) and (c)