Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 87

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In an electrolytic cell of $Ag / {AgNO}_{3} / Ag$ , when current is passed, the concentration of ${AgNO}_{3}$

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Important Questions on Electrochemistry

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 88

The two aqueous solutions,

A ({AgNO}_{3})

and

B (LiCl)

were electrolysed using

Pt .

electrodes. The

pH

of the resulting solutions will

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 89

In the electrolysis of aqueous

{CuBr}_{2}

using

Pt

electrodes: :

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 91

How many faradays are required to reduce one

mol

of

{MnO}_{4}^{-}

to

{Mn}^{2 +}

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 92

Three faradays of electricity was passed through an aqueous solution of iron

(II)

bromide. The mass of iron metal (at. mass

56

) deposited at the cathode is -

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 93

A current of

2 A

was passed for

1 h

through a solution of

{CuSO}_{4} . 0.237 g

of

{Cu}^{2 +}

ions were discharged at cathode. The current efficiency is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 94

A current of

9.65

ampere

is passed through the aqueous solution

NaCl

using suitable electrodes for

1000 s

. The amount of

NaOH

formed during electrolysis is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 9 - Electrochemistry>Exercise-1>Q 95

The salts of

A

(atomic

mass 15

),

B

(atomic

mass 27

) and

C

(atomic

mass 48

) were electrolysed using same amount of charge. It was found that when

4.5 g

of

A

was deposited, the mass of

B

and

C

deposited were

2.7 g

and

9.6 g .

The valencies of

A, B

and

C

, respectively.

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

In

H_{2} - O_{2}

fuel cell the reaction occuring at cathode is: