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CHXII03:ELECTROCHEMISTRY

330461 The pair of electrolytes that posses same value for the constant (A) in the Debye - Huckel - Onsagar equation, $Λ_{m} {= Λ}_{m}^{o} = A \sqrt{C}$

1

N H_{4} C l, N a B r

2

N a B r, M g S O_{4}

3

N a C l, C a C l_{2}

4

M g S O_{4}, N a_{2} S O_{4}

Explanation:

In Debye - Huckel Onsagar equation, the value of constant A depends on nature of electrolytes i.e., charge on cation and anion produced by dissociation of electrolytes in the solution.
$N H_{4} C l a n d N a B r$ on dissociation gives 2 ions each.
$N H_{4} C l \to {N H}_{4}^{+} + C l^{-}$
$N a B r \to N a^{+} + B r^{-}$
Therefore, they give same value for the constant (A).

KCET - 2020

CHXII03:ELECTROCHEMISTRY

330462 The one which decreases with dilution is

1 conductance

2 specific conductance

3 equivalent conductance

4 molar conductance

KCET - 2009

CHXII03:ELECTROCHEMISTRY

330463 In a cell that utilises the reaction
$Zn (s) + 2 H^{+} (aq) \to {Zn}^{2 +} (aq) + H_{2} (g)$
addition of $H_{2} {SO}_{4}$ to cathode compartment, will

1 increase the E and shift equilibrium to the right.

2 lower the

E

and shift equilibrium to the right.

3 lower the E and shift equlibrium to the left.

4 increase the

E

and shift equilibrium to the left.

Explanation:

$\begin{array}{l} Z n (s) + 2 H^{+} + (a q) \\ Z n^{2 +} (a q) + H_{2} (g) \end{array}$
$E_{c e l l} = E {^{\circ}}_{c e l l} - \frac{0 .059}{2} l o g \frac{[Z n^{2 +}] [H_{2}]}{{[H^{+}]}^{2}}$
Addition of $H_{2} S O_{4}$ will increase $[H^{+}]$ and
$E_{c e l l}$ will also increase and the equilibrium will shift towards RHS

CHXII03:ELECTROCHEMISTRY

330464 Statement A :
On increasing dilution, the specific conductance keep on increasing.
Statement B :
On increasing dilution, degree of ionisation of weak electrolyte increases and molar conductivity increases.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both Statements are correct.

4 Both Statements are incorrect.

CHXII03:ELECTROCHEMISTRY

330465 Assertion :
The conductivity of solution is greater than pure solvent.
Reason :
Conductivity depends upon number of the ions present in solution.

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.

CHXII03:ELECTROCHEMISTRY

330461 The pair of electrolytes that posses same value for the constant (A) in the Debye - Huckel - Onsagar equation, $Λ_{m} {= Λ}_{m}^{o} = A \sqrt{C}$

1

N H_{4} C l, N a B r

2

N a B r, M g S O_{4}

3

N a C l, C a C l_{2}

4

M g S O_{4}, N a_{2} S O_{4}

Explanation:

In Debye - Huckel Onsagar equation, the value of constant A depends on nature of electrolytes i.e., charge on cation and anion produced by dissociation of electrolytes in the solution.
$N H_{4} C l a n d N a B r$ on dissociation gives 2 ions each.
$N H_{4} C l \to {N H}_{4}^{+} + C l^{-}$
$N a B r \to N a^{+} + B r^{-}$
Therefore, they give same value for the constant (A).

KCET - 2020

CHXII03:ELECTROCHEMISTRY

330462 The one which decreases with dilution is

1 conductance

2 specific conductance

3 equivalent conductance

4 molar conductance

KCET - 2009

CHXII03:ELECTROCHEMISTRY

330463 In a cell that utilises the reaction
$Zn (s) + 2 H^{+} (aq) \to {Zn}^{2 +} (aq) + H_{2} (g)$
addition of $H_{2} {SO}_{4}$ to cathode compartment, will

1 increase the E and shift equilibrium to the right.

2 lower the

E

and shift equilibrium to the right.

3 lower the E and shift equlibrium to the left.

4 increase the

E

and shift equilibrium to the left.

Explanation:

$\begin{array}{l} Z n (s) + 2 H^{+} + (a q) \\ Z n^{2 +} (a q) + H_{2} (g) \end{array}$
$E_{c e l l} = E {^{\circ}}_{c e l l} - \frac{0 .059}{2} l o g \frac{[Z n^{2 +}] [H_{2}]}{{[H^{+}]}^{2}}$
Addition of $H_{2} S O_{4}$ will increase $[H^{+}]$ and
$E_{c e l l}$ will also increase and the equilibrium will shift towards RHS

CHXII03:ELECTROCHEMISTRY

330464 Statement A :
On increasing dilution, the specific conductance keep on increasing.
Statement B :
On increasing dilution, degree of ionisation of weak electrolyte increases and molar conductivity increases.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both Statements are correct.

4 Both Statements are incorrect.

CHXII03:ELECTROCHEMISTRY

330465 Assertion :
The conductivity of solution is greater than pure solvent.
Reason :
Conductivity depends upon number of the ions present in solution.

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.

CHXII03:ELECTROCHEMISTRY

330461 The pair of electrolytes that posses same value for the constant (A) in the Debye - Huckel - Onsagar equation, $Λ_{m} {= Λ}_{m}^{o} = A \sqrt{C}$

1

N H_{4} C l, N a B r

2

N a B r, M g S O_{4}

3

N a C l, C a C l_{2}

4

M g S O_{4}, N a_{2} S O_{4}

Explanation:

In Debye - Huckel Onsagar equation, the value of constant A depends on nature of electrolytes i.e., charge on cation and anion produced by dissociation of electrolytes in the solution.
$N H_{4} C l a n d N a B r$ on dissociation gives 2 ions each.
$N H_{4} C l \to {N H}_{4}^{+} + C l^{-}$
$N a B r \to N a^{+} + B r^{-}$
Therefore, they give same value for the constant (A).

KCET - 2020

CHXII03:ELECTROCHEMISTRY

330462 The one which decreases with dilution is

1 conductance

2 specific conductance

3 equivalent conductance

4 molar conductance

KCET - 2009

CHXII03:ELECTROCHEMISTRY

330463 In a cell that utilises the reaction
$Zn (s) + 2 H^{+} (aq) \to {Zn}^{2 +} (aq) + H_{2} (g)$
addition of $H_{2} {SO}_{4}$ to cathode compartment, will

1 increase the E and shift equilibrium to the right.

2 lower the

E

and shift equilibrium to the right.

3 lower the E and shift equlibrium to the left.

4 increase the

E

and shift equilibrium to the left.

Explanation:

$\begin{array}{l} Z n (s) + 2 H^{+} + (a q) \\ Z n^{2 +} (a q) + H_{2} (g) \end{array}$
$E_{c e l l} = E {^{\circ}}_{c e l l} - \frac{0 .059}{2} l o g \frac{[Z n^{2 +}] [H_{2}]}{{[H^{+}]}^{2}}$
Addition of $H_{2} S O_{4}$ will increase $[H^{+}]$ and
$E_{c e l l}$ will also increase and the equilibrium will shift towards RHS

CHXII03:ELECTROCHEMISTRY

330464 Statement A :
On increasing dilution, the specific conductance keep on increasing.
Statement B :
On increasing dilution, degree of ionisation of weak electrolyte increases and molar conductivity increases.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both Statements are correct.

4 Both Statements are incorrect.

CHXII03:ELECTROCHEMISTRY

330465 Assertion :
The conductivity of solution is greater than pure solvent.
Reason :
Conductivity depends upon number of the ions present in solution.

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.

CHXII03:ELECTROCHEMISTRY

330461 The pair of electrolytes that posses same value for the constant (A) in the Debye - Huckel - Onsagar equation, $Λ_{m} {= Λ}_{m}^{o} = A \sqrt{C}$

1

N H_{4} C l, N a B r

2

N a B r, M g S O_{4}

3

N a C l, C a C l_{2}

4

M g S O_{4}, N a_{2} S O_{4}

Explanation:

In Debye - Huckel Onsagar equation, the value of constant A depends on nature of electrolytes i.e., charge on cation and anion produced by dissociation of electrolytes in the solution.
$N H_{4} C l a n d N a B r$ on dissociation gives 2 ions each.
$N H_{4} C l \to {N H}_{4}^{+} + C l^{-}$
$N a B r \to N a^{+} + B r^{-}$
Therefore, they give same value for the constant (A).

KCET - 2020

CHXII03:ELECTROCHEMISTRY

330462 The one which decreases with dilution is

1 conductance

2 specific conductance

3 equivalent conductance

4 molar conductance

KCET - 2009

CHXII03:ELECTROCHEMISTRY

330463 In a cell that utilises the reaction
$Zn (s) + 2 H^{+} (aq) \to {Zn}^{2 +} (aq) + H_{2} (g)$
addition of $H_{2} {SO}_{4}$ to cathode compartment, will

1 increase the E and shift equilibrium to the right.

2 lower the

E

and shift equilibrium to the right.

3 lower the E and shift equlibrium to the left.

4 increase the

E

and shift equilibrium to the left.

Explanation:

$\begin{array}{l} Z n (s) + 2 H^{+} + (a q) \\ Z n^{2 +} (a q) + H_{2} (g) \end{array}$
$E_{c e l l} = E {^{\circ}}_{c e l l} - \frac{0 .059}{2} l o g \frac{[Z n^{2 +}] [H_{2}]}{{[H^{+}]}^{2}}$
Addition of $H_{2} S O_{4}$ will increase $[H^{+}]$ and
$E_{c e l l}$ will also increase and the equilibrium will shift towards RHS

CHXII03:ELECTROCHEMISTRY

330464 Statement A :
On increasing dilution, the specific conductance keep on increasing.
Statement B :
On increasing dilution, degree of ionisation of weak electrolyte increases and molar conductivity increases.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both Statements are correct.

4 Both Statements are incorrect.

CHXII03:ELECTROCHEMISTRY

330465 Assertion :
The conductivity of solution is greater than pure solvent.
Reason :
Conductivity depends upon number of the ions present in solution.

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.

CHXII03:ELECTROCHEMISTRY

330461 The pair of electrolytes that posses same value for the constant (A) in the Debye - Huckel - Onsagar equation, $Λ_{m} {= Λ}_{m}^{o} = A \sqrt{C}$

1

N H_{4} C l, N a B r

2

N a B r, M g S O_{4}

3

N a C l, C a C l_{2}

4

M g S O_{4}, N a_{2} S O_{4}

Explanation:

In Debye - Huckel Onsagar equation, the value of constant A depends on nature of electrolytes i.e., charge on cation and anion produced by dissociation of electrolytes in the solution.
$N H_{4} C l a n d N a B r$ on dissociation gives 2 ions each.
$N H_{4} C l \to {N H}_{4}^{+} + C l^{-}$
$N a B r \to N a^{+} + B r^{-}$
Therefore, they give same value for the constant (A).

KCET - 2020

CHXII03:ELECTROCHEMISTRY

330462 The one which decreases with dilution is

1 conductance

2 specific conductance

3 equivalent conductance

4 molar conductance

KCET - 2009

CHXII03:ELECTROCHEMISTRY

330463 In a cell that utilises the reaction
$Zn (s) + 2 H^{+} (aq) \to {Zn}^{2 +} (aq) + H_{2} (g)$
addition of $H_{2} {SO}_{4}$ to cathode compartment, will

1 increase the E and shift equilibrium to the right.

2 lower the

E

and shift equilibrium to the right.

3 lower the E and shift equlibrium to the left.

4 increase the

E

and shift equilibrium to the left.

Explanation:

$\begin{array}{l} Z n (s) + 2 H^{+} + (a q) \\ Z n^{2 +} (a q) + H_{2} (g) \end{array}$
$E_{c e l l} = E {^{\circ}}_{c e l l} - \frac{0 .059}{2} l o g \frac{[Z n^{2 +}] [H_{2}]}{{[H^{+}]}^{2}}$
Addition of $H_{2} S O_{4}$ will increase $[H^{+}]$ and
$E_{c e l l}$ will also increase and the equilibrium will shift towards RHS

CHXII03:ELECTROCHEMISTRY

330464 Statement A :
On increasing dilution, the specific conductance keep on increasing.
Statement B :
On increasing dilution, degree of ionisation of weak electrolyte increases and molar conductivity increases.

1 Statement A is correct but Statement B is incorrect.

2 Statement A is incorrect but Statement B is correct.

3 Both Statements are correct.

4 Both Statements are incorrect.

CHXII03:ELECTROCHEMISTRY

330465 Assertion :
The conductivity of solution is greater than pure solvent.
Reason :
Conductivity depends upon number of the ions present in solution.

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.