Which of the following statements is $NOT$ correct?
- A$pH$ of $1 \times 10^{-8} \ M \ HCl$ is $8$.
- BWhen $96,500 \ C$ of electricity is passed through a $CuSO_4$ solution,$1 \ \text{gram equivalent}$ of copper is deposited at the cathode.
- CThe conjugate base of ${H_2}PO_4^-$ is $HPO_4^{2-}$.
- DFor all aqueous solutions,$pH + pOH = 14$ at $298 \ K$.
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Similar Questions
The equilibrium constant of a $2$ electron redox reaction at $298 \, K$ is $3.8 \times 10^{-3}$. The cell potential $E^{\circ}$ (in $V$) and the free energy change $\Delta G^{\circ}$ (in $kJ \, mol^{-1}$) for this equilibrium,respectively are
MediumKVPY 2016
View SolutionMatch the following:
List-$I$ List-$II$ $(A)$ Potential of hydrogen electrode at $pH = 10$ $(I)$ $0.76 \ V$ $(B)$ $Cu^{2+}|Cu$ $(II)$ $0.059$ $(C)$ $Zn|Zn^{2+}$ $(III)$ $-0.591 \ V$ $(D)$ $\frac{2.303RT}{F}$ $(IV)$ $0.337 \ V$ $(V)$ $-0.76 \ V$
$(a)$ $A-III, B-I, C-II, D-V$
$(b)$ $A-II, B-V, C-I, D-IV$
$(c)$ $A-III, B-IV, C-I, D-II$
$(d)$ $A-V, B-I, C-IV, D-II$
| List-$I$ | List-$II$ |
|---|---|
| $(A)$ Potential of hydrogen electrode at $pH = 10$ | $(I)$ $0.76 \ V$ |
| $(B)$ $Cu^{2+}|Cu$ | $(II)$ $0.059$ |
| $(C)$ $Zn|Zn^{2+}$ | $(III)$ $-0.591 \ V$ |
| $(D)$ $\frac{2.303RT}{F}$ | $(IV)$ $0.337 \ V$ |
| $(V)$ $-0.76 \ V$ |
$(a)$ $A-III, B-I, C-II, D-V$
$(b)$ $A-II, B-V, C-I, D-IV$
$(c)$ $A-III, B-IV, C-I, D-II$
$(d)$ $A-V, B-I, C-IV, D-II$
Match the entries from Column $I$ and Column $II$ and choose the correct order.
$A$. Leclanche cell $1$. Converts energy of combustion into electrical energy $B$. Fuel cell $2$. Rechargeable cell $C$. Ni-Cd cell $3$. At anode,$Zn \longrightarrow Zn^{2+} + 2e^{-}$
| $A$. Leclanche cell | $1$. Converts energy of combustion into electrical energy |
| $B$. Fuel cell | $2$. Rechargeable cell |
| $C$. Ni-Cd cell | $3$. At anode,$Zn \longrightarrow Zn^{2+} + 2e^{-}$ |
Which of the following statements is wrong?
Easy
View SolutionUsing the standard electrode potentials,predict if the reaction between the following is feasible:
$(a) Fe_{(aq)}^{3+} \text{ and } I_{(aq)}^{-}$
$(b) Ag_{(aq)}^{+} \text{ and } Cu_{(s)}$
$(c) Fe_{(aq)}^{3+} \text{ and } Cu_{(s)}$
$(d) Ag_{(s)} \text{ and } Fe_{(aq)}^{3+}$
$(e) Br_{2(aq)} \text{ and } Fe_{(aq)}^{2+}$
$(a) Fe_{(aq)}^{3+} \text{ and } I_{(aq)}^{-}$
$(b) Ag_{(aq)}^{+} \text{ and } Cu_{(s)}$
$(c) Fe_{(aq)}^{3+} \text{ and } Cu_{(s)}$
$(d) Ag_{(s)} \text{ and } Fe_{(aq)}^{3+}$
$(e) Br_{2(aq)} \text{ and } Fe_{(aq)}^{2+}$
Difficult
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