Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 10

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12th Tamil Nadu Board

IMPORTANT

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The number of electrons delivered at the cathode during electrolysis by a current of $1 A$ in $60$ seconds is (charge of electron $= 1.6 \times 10^{- 19} C$ ).

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Important Questions on Electro Chemistry

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12th Tamil Nadu Board

IMPORTANT

Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 11

Which of the following electrolytic solution has the least specific conductance

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12th Tamil Nadu Board

IMPORTANT

Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 12

While charging lead storage battery

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12th Tamil Nadu Board

IMPORTANT

Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 13

Among the following cells
I) Leclanche cell
II) Nickel–Cadmium cell
III) Lead storage battery
IV) Mercury cell
Primary cells are-

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12th Tamil Nadu Board

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Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 14

Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

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12th Tamil Nadu Board

IMPORTANT

Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 16

In

H_{2} - O_{2}

fuel cell, the reaction occurs at the cathode is

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12th Tamil Nadu Board

IMPORTANT

Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 17

The equivalent conductance of

\frac{M}{36}

solution of a weak monobasic acid is

6 mho {cm}^{2} {equivalent}^{- 1}

and at infinite dilution is

400 mho {cm}^{2} {equivalent}^{- 1}

. The dissociation constant of this acid is

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12th Tamil Nadu Board

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Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 18

A conductivity cell has been calibrated with a

0.01 M

,

1 : 1

electrolytic solution (specific conductance (

κ = 1.25 \times 10^{- 3} S {cm}^{- 1}

)) in the cell and the measured resistance was

800 Ω

at

25 ° C

. The cell constant is,

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12th Tamil Nadu Board

IMPORTANT

Chemistry Standard 12 Vol II>Chapter 2 - Electro Chemistry>EVALUATION>Q 19

The conductivity of a saturated solution of a sparingly soluble salt AB (

1 : 1

electrolyte) at

298 K

is

1.85 \times 10^{- 5} S m^{- 1}

. Solubility product of the salt AB at

298 K

({\land_{m}}^{°})_{AB}

= 14 \times 10^{- 3} S m^{2} {mol}^{- 1}

.