Important Questions and Answers: Chemical effect of current

1. Distinguish between metallic conductor and electrolytic conductor.

Ans: Those conductors through which electricity can pass without any chemical changes are called metallic conductors. In metallic conductors, conduction takes place by the moving of free electrons under the influence of applied potential.

Those conductors through conduct electricity though chemical changes are called electrolytic conductors. In electrolytic conduction, the movement of ions from one electrode to another electrode causes the flow of electric current.

2. What is Faraday’s constant?

Ans: Faraday’s constant can be defined as the quantity of electricity required to deposit 1 gram equivalent weight of a substance. It is denoted by F. It’s value is 96500 Cmol-1.

3. Why electrolytic conductivity of electrolyte is less than that of metals?

Ans: The conductivity of electrolyte is less than that of metals due to the following reasons:

  • The density of free ions is very less in electrolyte in compared to that of metals.
  • The drift velocity of ions is less than that of free electrons.
  • The resistance offered by the electrolyte to the ions is much more than offered by the metals to that of electron.

4. Can we use alternating current in electrolysis?

Ans: No, we cannot use alternating current in electrolysis. Alternating current will tend to take place alternately in opposite directions. So, there will be no deposition in any electrodes.  

5. What is primary and secondary coil ?

Ans: The electrochemical cell which cannot be recharged again once its chemical energy is ceased is known as primary cell while the chemical cell which can be recharged again and again is called secondary coil. Laclanche cell is an example of primary cell and lead acid cell is an example of secondary coil.

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One Response to “Important Questions and Answers: Chemical effect of current”

  1. Salom

    Questions on a voltaic cell