What is the total score for the correct statement(s) from the following :
Statement Score
a. A stronger oxidizing agent has lower oxidation potential 4
b. Solution of aqueous $A g N O_{3}$ cannot be stored in Zn vessel.
1
c. In a concentration cell made up of Ag electrodes, the one having $[A g^{\oplus}]$ will behave as cathode. 3
d. $[C u^{2 +}]$ will remain constant during electrolysis of aqueous $C u S O_{4}$ solution with Pt electrode as anode and Cu electrode as cathode. 2

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Solution

Statements (a), (b) and (c) are correct, so total score = 4 + 1 + 3 = 8
(a) Any electrode having lower oxidation potential means it has less tendency to undergo oxidation or more tendency to undergo reduction. So it would be a stronger oxidizing agent. Hence, the statement is correct and the score is 4.
(b) If the oxidation potential of Zn vessel is more than the oxidation potential of the solution $(A g N O_{3})$ , then it will constitute a fesible cell and $E_{c e l l}^{⊖}$ will be positive. So one cannot store the solution $(A g N O_{3})$ in a vessel made up of Zn.
$E_{Z n | Z n^{2 +}}^{⊖} = 0.76 V$ .
or
$E_{Z n^{2} | Z n}^{⊖} = - 0.76 V$
$E_{A g | A g^{\oplus}}^{⊖} = - 0.80 V$
or
$E_{A g | A g^{\oplus}}^{⊖} = 0.80 V$
$∴ E_{c e l l}^{⊖} = (E_{r e d}^{⊖})_{c} - (E_{r e d}^{⊖})_{a}$
= 0.80 - (-0.76) = 1.56 V
Hence, the statement is correct and the score is 1. Cell reperesent :
$Z n | Z n^{2 +} | | A g^{\oplus} | A g$
(c) Representation of concentration cell :
$A g | A g^{\oplus} (c_{1}) | | A g^{\oplus} (c_{2}) | A g$
$A g | A g^{\oplus} (c_{1})$ behaves as anode and $A g | A g^{\oplus} (c_{2})$ behaves as cathode. Hence, the statement is correct and the score is 3.
(d) The statement is wrong. Correct statement would be : If Pt electrodes act as cathode and Cu electrodes as anode. Since Cu from anode will give $C u^{2 +}$ and dissolve in solution and same equivalent of $C u^{2 +}$ from solution will be deposited on Pt electrodes, so $[C u^{2 +}]$ will remain constant.

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Similar questions

Q. During electrolysis of an aqueous solution of

C u S O_{4}

using copper electrodes, if 2.5 g of Cu is deposited at cathode, then at anode:

Q. Electrolysis of an aqueous solution of

A g N O_{3}

with silver electrodes produces

(i) - - -

at cathode while

(i i) - -- -

ions are dissolved from anode. When Pt electrodes are used

(i i i) - --- -

is produced at anode and

(i v) - -- -

at cathode.

Q. Assertion: Starting from aq. copper [II] sulphate solution, equations for the reactions at the cathode and anode during electrolysis of aq.

C u S O_{4}

using active copper electrodes is;
at anode:

C u^{+ 2} + 2 e^{-} \to C u

at cathode:

C u \to C u^{+ 2} + 2 e^{-}

Reason: Oxidation always take place at anode and reduction at cathode.

Aqueous $C u S O_{4}$ is electrolyzed using $A g$ as anode and $C u$ as cathode, then product of electrolysis at anode and cathode are, respectively

Which of the following statements are correct?

a) The electrolysis of aqueous NaCl produces hydrogen gas at the cathode and chlorine gas at the anode .

b) The electrolysis of a $C u S O_{4}$ solution using Pt electrodes causes the liberation of $O_{2}$ at the anode and the deposition of copper at the cathode .

c) Oxygen and hydrogen are produced at the anode and cathode during the electrolysis of dilute aqueous solution of $H_{2} S O_{4}$ .

d) All electrolytic reactions are redox reactions .

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	Statement	Score
a.	A stronger oxidizing agent has lower oxidation potential	4
b.	Solution of aqueous $A g N O_{3}$ cannot be stored in Zn vessel.	1
c.	In a concentration cell made up of Ag electrodes, the one having $[A g^{\oplus}]$ will behave as cathode.	3
d.	$[C u^{2 +}]$ will remain constant during electrolysis of aqueous $C u S O_{4}$ solution with Pt electrode as anode and Cu electrode as cathode.	2