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Two platinum electrodes were immersed i...

Two platinum electrodes were immersed in a solution of `CuSO_(4)` and electric current was passed through the solution. After some time, it was found that colour of `CuSO_(4)` disappeared with evolution of gas at the electrode. The colourless solution contains.

A

Platinum sulphate

B

Copper sulphate

C

Copper hydroxide

D

Sulphuric acid

Text Solution

Verified by Experts

The correct Answer is:
D
`2Cu^(+2)overset(+4e^(-))rarr2Cu` (cathode)
`2H_(2)O overset(-4e^(-))rarrO_(2)uparrow+4H^(+)("anode")2H^(+)+SO_(4)^(-2) rarrH_(2)SO_(4)`
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NARAYNA- ELECTRO CHEMISTRY-LEVEL-II(H.W)
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  2. Which of the following on electrolysis would, not evolve oxygen at the...

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  3. In which of the following electrolysis, the composition of electrolyte...

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  4. In the electrolysis of Na(2)SO(4) solution using inert electrodes a)...

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  5. How many coulombs of electricity are consumed when a 100 mA current is...

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  6. The same current if passed through solution of silver nitrate and cupr...

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  7. Aluminium oxide may be electrolysed at 1000^(@)C to furnish aluminium ...

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  8. In an electrolytic cell one litre of 1M aqueous solution of MnO(4)^(-)...

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  9. If 90 g of water is electrolysed completely with 50% current efficienc...

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  10. On electrolysis of a sample of acidified water, 22.4 ml of hydrogen wa...

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  11. Three faradays of electricity are passed through molten Al2O3 aqueous ...

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  12. Number of coulombs of current required to convert completely 1 mole of...

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  13. On passing a current through a molten aluminium chloride for some time...

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  14. A current of 2A passing for 5 hours deposits 22.2 g of tin (at.wt=119)...

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  15. 1 ampere current is passed for 60 seconds into an electrolytic cell. N...

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  16. The number of electrons passing per second through a cross-section of ...

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  17. Zinc reacts with CuSO(4) according to the equation Zn+CuSO(4)rarrZnSO(...

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  18. Total volume of gases evolved at STP when 36 g of H(2)O are completely...

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  19. What is the approximate quantity of electricity in colombs required to...

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  20. The specific conductance of a solution is 0.3568 " ohm"^(-1) cm^(-1) w...

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