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CHXII03:ELECTROCHEMISTRY

330039 Which among the following statements is true for Galvanic cell?

1 The anode is negative and cathode is positive

2 Electrical energy is converted into chemical energy.

3 The anode is positive and cathode is negative

4 Oxidation takes place at positive electrode and reduction takes place at negative electrode.

MHTCET - 2021

CHXII03:ELECTROCHEMISTRY

330040 Assertion :
$KCl, NaCl$ and ${NH}_{4} Cl$ cannot be used in the salt bridge of a cell containing silver.
Reason :
A salt bridge contains concentrated solution of an inert electrolyte like $KCl, {KNO}_{3}$ $K_{2} {SO}_{4}$ or solidified solution of such an electrolyte in agar-agar and gelatine.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

$KCl, NaCl$ , and ${NH}_{4} {NO}_{3}$ are unsuitable as salt bridges in a cell with silver $(Ag)$ electrodes due to their potential to react with silver ions $({Ag}^{+})$ forming silver chloride precipitate $(AgCl)$ , which can block the salt bridge and hinder ionic conductivity. A non-reactive electrolyte is essential for proper cell functioning. So, option (2) is correct.

CHXII03:ELECTROCHEMISTRY

330041 Which one is not called as anode reaction from the following?

1

C l^{-} \to \frac{1}{2} C l_{2} + e^{-}

2

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

3

H g^{+} \to H g^{+ +} + e^{-}

4

Z n^{2 +} \to 2 e^{-} + Z n

Explanation:

$Z n^{2 +} \to 2 e^{-} + Z n$ , it shows reduction reaction.

CHXII03:ELECTROCHEMISTRY

330042 If a salt bridge is removed between the two half cells, the voltage

1 Drops to zero

2 Does not change

3 Increases gradually

4 Increases rapidly

CHXII03:ELECTROCHEMISTRY

330043 The standard emf of $Zn - Cu$ voltaic cell is

1 2.1 V

2 2.8 V

3 1.2 V

4 1.1 V

Explanation:

The standard emf of $Zn - Cu$ voltaic cell is 1.1 V at 208 K .

CHXII03:ELECTROCHEMISTRY

330039 Which among the following statements is true for Galvanic cell?

1 The anode is negative and cathode is positive

2 Electrical energy is converted into chemical energy.

3 The anode is positive and cathode is negative

4 Oxidation takes place at positive electrode and reduction takes place at negative electrode.

MHTCET - 2021

CHXII03:ELECTROCHEMISTRY

330040 Assertion :
$KCl, NaCl$ and ${NH}_{4} Cl$ cannot be used in the salt bridge of a cell containing silver.
Reason :
A salt bridge contains concentrated solution of an inert electrolyte like $KCl, {KNO}_{3}$ $K_{2} {SO}_{4}$ or solidified solution of such an electrolyte in agar-agar and gelatine.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

$KCl, NaCl$ , and ${NH}_{4} {NO}_{3}$ are unsuitable as salt bridges in a cell with silver $(Ag)$ electrodes due to their potential to react with silver ions $({Ag}^{+})$ forming silver chloride precipitate $(AgCl)$ , which can block the salt bridge and hinder ionic conductivity. A non-reactive electrolyte is essential for proper cell functioning. So, option (2) is correct.

CHXII03:ELECTROCHEMISTRY

330041 Which one is not called as anode reaction from the following?

1

C l^{-} \to \frac{1}{2} C l_{2} + e^{-}

2

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

3

H g^{+} \to H g^{+ +} + e^{-}

4

Z n^{2 +} \to 2 e^{-} + Z n

Explanation:

$Z n^{2 +} \to 2 e^{-} + Z n$ , it shows reduction reaction.

CHXII03:ELECTROCHEMISTRY

330042 If a salt bridge is removed between the two half cells, the voltage

1 Drops to zero

2 Does not change

3 Increases gradually

4 Increases rapidly

CHXII03:ELECTROCHEMISTRY

330043 The standard emf of $Zn - Cu$ voltaic cell is

1 2.1 V

2 2.8 V

3 1.2 V

4 1.1 V

Explanation:

The standard emf of $Zn - Cu$ voltaic cell is 1.1 V at 208 K .

CHXII03:ELECTROCHEMISTRY

330039 Which among the following statements is true for Galvanic cell?

1 The anode is negative and cathode is positive

2 Electrical energy is converted into chemical energy.

3 The anode is positive and cathode is negative

4 Oxidation takes place at positive electrode and reduction takes place at negative electrode.

MHTCET - 2021

CHXII03:ELECTROCHEMISTRY

330040 Assertion :
$KCl, NaCl$ and ${NH}_{4} Cl$ cannot be used in the salt bridge of a cell containing silver.
Reason :
A salt bridge contains concentrated solution of an inert electrolyte like $KCl, {KNO}_{3}$ $K_{2} {SO}_{4}$ or solidified solution of such an electrolyte in agar-agar and gelatine.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

$KCl, NaCl$ , and ${NH}_{4} {NO}_{3}$ are unsuitable as salt bridges in a cell with silver $(Ag)$ electrodes due to their potential to react with silver ions $({Ag}^{+})$ forming silver chloride precipitate $(AgCl)$ , which can block the salt bridge and hinder ionic conductivity. A non-reactive electrolyte is essential for proper cell functioning. So, option (2) is correct.

CHXII03:ELECTROCHEMISTRY

330041 Which one is not called as anode reaction from the following?

1

C l^{-} \to \frac{1}{2} C l_{2} + e^{-}

2

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

3

H g^{+} \to H g^{+ +} + e^{-}

4

Z n^{2 +} \to 2 e^{-} + Z n

Explanation:

$Z n^{2 +} \to 2 e^{-} + Z n$ , it shows reduction reaction.

CHXII03:ELECTROCHEMISTRY

330042 If a salt bridge is removed between the two half cells, the voltage

1 Drops to zero

2 Does not change

3 Increases gradually

4 Increases rapidly

CHXII03:ELECTROCHEMISTRY

330043 The standard emf of $Zn - Cu$ voltaic cell is

1 2.1 V

2 2.8 V

3 1.2 V

4 1.1 V

Explanation:

The standard emf of $Zn - Cu$ voltaic cell is 1.1 V at 208 K .

CHXII03:ELECTROCHEMISTRY

330039 Which among the following statements is true for Galvanic cell?

1 The anode is negative and cathode is positive

2 Electrical energy is converted into chemical energy.

3 The anode is positive and cathode is negative

4 Oxidation takes place at positive electrode and reduction takes place at negative electrode.

MHTCET - 2021

CHXII03:ELECTROCHEMISTRY

330040 Assertion :
$KCl, NaCl$ and ${NH}_{4} Cl$ cannot be used in the salt bridge of a cell containing silver.
Reason :
A salt bridge contains concentrated solution of an inert electrolyte like $KCl, {KNO}_{3}$ $K_{2} {SO}_{4}$ or solidified solution of such an electrolyte in agar-agar and gelatine.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

$KCl, NaCl$ , and ${NH}_{4} {NO}_{3}$ are unsuitable as salt bridges in a cell with silver $(Ag)$ electrodes due to their potential to react with silver ions $({Ag}^{+})$ forming silver chloride precipitate $(AgCl)$ , which can block the salt bridge and hinder ionic conductivity. A non-reactive electrolyte is essential for proper cell functioning. So, option (2) is correct.

CHXII03:ELECTROCHEMISTRY

330041 Which one is not called as anode reaction from the following?

1

C l^{-} \to \frac{1}{2} C l_{2} + e^{-}

2

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

3

H g^{+} \to H g^{+ +} + e^{-}

4

Z n^{2 +} \to 2 e^{-} + Z n

Explanation:

$Z n^{2 +} \to 2 e^{-} + Z n$ , it shows reduction reaction.

CHXII03:ELECTROCHEMISTRY

330042 If a salt bridge is removed between the two half cells, the voltage

1 Drops to zero

2 Does not change

3 Increases gradually

4 Increases rapidly

CHXII03:ELECTROCHEMISTRY

330043 The standard emf of $Zn - Cu$ voltaic cell is

1 2.1 V

2 2.8 V

3 1.2 V

4 1.1 V

Explanation:

The standard emf of $Zn - Cu$ voltaic cell is 1.1 V at 208 K .

CHXII03:ELECTROCHEMISTRY

330039 Which among the following statements is true for Galvanic cell?

1 The anode is negative and cathode is positive

2 Electrical energy is converted into chemical energy.

3 The anode is positive and cathode is negative

4 Oxidation takes place at positive electrode and reduction takes place at negative electrode.

MHTCET - 2021

CHXII03:ELECTROCHEMISTRY

330040 Assertion :
$KCl, NaCl$ and ${NH}_{4} Cl$ cannot be used in the salt bridge of a cell containing silver.
Reason :
A salt bridge contains concentrated solution of an inert electrolyte like $KCl, {KNO}_{3}$ $K_{2} {SO}_{4}$ or solidified solution of such an electrolyte in agar-agar and gelatine.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.

2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.

3 Assertion is correct but Reason is incorrect.

4 Assertion is incorrect but Reason is correct.

Explanation:

$KCl, NaCl$ , and ${NH}_{4} {NO}_{3}$ are unsuitable as salt bridges in a cell with silver $(Ag)$ electrodes due to their potential to react with silver ions $({Ag}^{+})$ forming silver chloride precipitate $(AgCl)$ , which can block the salt bridge and hinder ionic conductivity. A non-reactive electrolyte is essential for proper cell functioning. So, option (2) is correct.

CHXII03:ELECTROCHEMISTRY

330041 Which one is not called as anode reaction from the following?

1

C l^{-} \to \frac{1}{2} C l_{2} + e^{-}

2

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

3

H g^{+} \to H g^{+ +} + e^{-}

4

Z n^{2 +} \to 2 e^{-} + Z n

Explanation:

$Z n^{2 +} \to 2 e^{-} + Z n$ , it shows reduction reaction.

CHXII03:ELECTROCHEMISTRY

330042 If a salt bridge is removed between the two half cells, the voltage

1 Drops to zero

2 Does not change

3 Increases gradually

4 Increases rapidly

CHXII03:ELECTROCHEMISTRY

330043 The standard emf of $Zn - Cu$ voltaic cell is

1 2.1 V

2 2.8 V

3 1.2 V

4 1.1 V

Explanation:

The standard emf of $Zn - Cu$ voltaic cell is 1.1 V at 208 K .

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