Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 4

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Earn 100

$Zn$ rod is placed in $100 mL$ of $1 M {CuSO}_{4}$ solution so that molarity of ${Cu}^{2 +}$ changes to $0.7 M$ . The molarity of ${SO}_{4}^{2 -}$ at this stage will be

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Important Questions on Electrochemistry

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 5

The time taken by the galvanic cell which operates almost ideally under reversible conditions at a current of

10^{- 16} A

to deliver

1

mole of electron is

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 6

A direct current deposits

54 g

of silver (atomic mass

= 108

) during the electrolysis. The same quantity of electricity would deposit aluminium (atomic mass

= 27

) from aluminium chloride in molten state equal to

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 7

During the electrolysis of water

4 mol

of electrons were transferred from anode to cathode. The total volume of gases produced at STP will be approximately

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 8

The quantity of electricity required to reduce

12.3 g

of nitro benzene to aniline assuming

50 %

current efficiency is

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 9

A

100 watt

,

110 volt

lamp is connected in series with an electrolytic cell containing

{CdSO}_{4}

solution, the weight of Cd deposited by the current for

10 hrs

is (At. wt. of

Cd = 112.4

)

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 10

The two platinum electrodes fitted in a conductance cell are

1.5 cm

apart while the cross sectional area of each electrode is

0.75 {cm}^{2}

. What is the cell constant?

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 11

A current of

2.0 A

is passed for

5

hours through a molten metal salt deposits

22.2 g

of metal (At. mass:

177

). The oxidation state of the metal in metal salt is

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Gamma Question Bank for Medical Chemistry>Chapter 17 - Electrochemistry>Assignment>Q 12

A current of

0.965

ampere is passed through

500 ml

of

0.2 M

solution of

{ZnSO}_{4}

for

10

minutes. The molarity of

{Zn}^{2 +}

after deposition of zinc is