Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 97

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Earn 100

In $H_{2} - O_{2}$ fuel cell the reaction occuring at cathode is:

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Important Questions on Electrochemistry

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 98

Which is not correct method for prevention of iron from Rusting -

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 99

Which of the following curve represents the variation of $Λ_{M}$ with $\sqrt{C}$ for ${AgNO}_{3} ?$

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 100

Which has maximum conductivity:

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 101

Resistance of decimolar solution is

50 ohm

. If electrodes of surface area

0.0004 m^{2}

each are placed at a distance of

0.02 m

then conductivity of solution is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 102

V_{1}

Litre

of solution

A

(Resistance

= 50

ohm

) is mixed with

V_{2}

Litre

of solution

B

(Resistance

= 100

ohm

). Resistance of final solution is

80 ohm

then

\frac{V_{2}}{V_{1}}

will be (using same cell)

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 103

The ionisation constant of a weak acid electrolyte is

25 \times 10^{- 6}

, while the equivalent conductance of its

0.01 M

solution is

19.6 S {cm}^{2} {eq}^{- 1}

. The equivalent conductance of the electrolyte at infinite dilution (in

S {cm}^{2} {eq}^{- 1}

) will be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 104

The conductivity of a saturated solution of

{BaSO}_{4}

is

3.06 \times 10^{- 6} {ohm}^{- 1} {cm}^{- 1}

and its molar conductance is

1.53 {ohm}^{- 1} {cm}^{2} {mol}^{- 1}

. The

K_{sp}

for

{BaSO}_{4}

will be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 105

Molar conductance of

0.1 M

acetic acid is

7 {ohm}^{- 1} {cm}^{2} {mol}^{- 1} .

If the molar conductance of acetic acid at infinite dilution is

380.8 {ohm}^{- 1} {cm}^{2} {mol}^{- 1},

the value of dissociation constant will be: