Home
Class 12
CHEMISTRY
In an electrolytic cell...

In an electrolytic cell

A

oxidation takes place at the negative electrode

B

reduction is spontaneous

C

reduction takes place at the positive electrode

D

reduction takes place at the negative electrode

Text Solution

Verified by Experts

The correct Answer is:
D

Electrodes are surfaces on which oxidation or reduction half-reactions occurs. They may or may not par-ticipate in the reactions. Those that do not react are called inert electrodes. Regardless of the kind of cell, electrolytic or voltaic, the electrodes are identified as follows:
The cathode is defined as the electrode at which reduction occurs as electrons are gained by some species. The anode is the electrode at which oxidation occurs as electrons are lost by same species.
Each of these can be either the positive or the negative elec-trode. The signs of the electrodes are opposite for the two kinds of cells. In a galvanic cell, the cathode is considered negative because it receives electrons from the external circuit, but in an electrolytic cell, the cathode is considered negative because electrons are pumped into it by the battery i.e. it is connected to the negative terminal of the battery. An electrolytic cell is an electrochemical cell in which an electric current drives an otherwise nonspontaneous reaction. The process of producing a chemical change in an electrolytic cell is called electrolysis.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    R SHARMA|Exercise Follow-up Test 9|11 Videos
  • ELECTROCHEMISTRY

    R SHARMA|Exercise Follow-up Test 10|3 Videos
  • ELECTROCHEMISTRY

    R SHARMA|Exercise Follow-up Test 7|12 Videos
  • COORDINATION COMPOUNDS

    R SHARMA|Exercise Archives|56 Videos
  • GENERAL PRINCIPALS AND ISOLATION OF ELEMENTS

    R SHARMA|Exercise Arechives|16 Videos

Similar Questions

Explore conceptually related problems

Give four differences between an electrochemical cell and an electrolytic cell.

Consider the following diagram in which an electrochemical cell is coupled to an electrolytic cell. What will be the polarity of electrodes 'A' and 'B' in the electrolytic cell ?

Knowledge Check

  • Which one of following statements is wrong about in electrochemical cell (ECC) and an electrolytic cell (ELC)?

    A
    ECC produces electricity ELC consumes electricity.
    B
    ECC uses a salt bridge/porous pot, ELC does not
    C
    Anode of ECC is negative while anode of ELC is positive
    D
    In both ECC and the redox reaction is spontaneous.
  • The cathode in a galvanic cell and electrolytic cell is

    A
    negatively charged in both cases
    B
    positively charged in both cases
    C
    positively charged in galvanic cell but negatively charged in an electrolytic cell
    D
    negatively charged in a galvanic cell but positively charged in an electrolytic cell.
  • Which of the following is true for an electrolytic cell?

    A
    Reduction takes place at the anode
    B
    The reaction is spontaneous
    C
    Electrons start to flow from the cathode
    D
    An electrolytic cell requires a salt bridge
  • Similar Questions

    Explore conceptually related problems

    Consider the following diagram in which an electrochemical cell is coupled to an electrolytic cell. What will be the polarity of electrodes 'A' and 'B' in the electrolytic cell ?

    Consider the following diagram in which an electrochemical cell is coupled to an electrolytic cell. What will be the polarity of electrodes 'A' an d 'B' in the electrolytic cell?

    What does an electrolytic cell convert?

    A voltaic cell can be changed into an electrolytic cell by

    An electrochemical cell an behave like an electrolytic cell when