Tag: metallic and electrolytic conduction

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Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

Which of the following sentences about conduction is/are true?

  1. Electrolytic conduction involves transfer of matter

  2. Metallic conduction does not involve transfer of matter

  3. Both of the above

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In electrolytic conduction, a voltage is applied across the electrodes dipped into the electrolytic solution. There are ions present in electrolytic solution. Because of the voltage applied, electric current will flow in the solution. The ions will move in the solution. The cations will move towards the cathode, whereas the anions will move towards the anode.
Thus in electrolytic conduction mass is transferred in the form of ions.
Whereas, no such transfer of mass occur in metallic conduction. It is just the flow of electrons. 

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

 Which of the following statements is true about electrolytic conduction?

  1. Occurs due to flow of electrons

  2. Occurs due to flow of ions

  3. Both of the above

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In an electrolytic solution when a voltage is applied across the electrodes dipped into the solution, the ions present in the electrolyte move. The cations move towards the cathode, whereas the anions move towards the anode and thus electric current flows through the electrolytic solution. Thus electrolytic conduction occurs because of the flow of ions.

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

Metals are good conductors of electricity because of which of the following reasons?

  1. Metals have free electrons

  2. Metals have free ions

  3. Metals have free atoms

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Metal atoms have outer electrons which are not tied to any other atom. Thus metals have free electrons. This electron can move freely in the metal structure. Because of the presence of this free electron metals can conduct electricity. Electricity is the flow of electrons.

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

In a conduction process,change of mass was observed. The conduction type can be:

  1. metallic

  2. electrolytic

  3. may be any one of these

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a conduction process,change of mass was observed. The conduction type can be electrolytic as electrolytic conduction takes place due to flow of ions thus electrolytic conduction involves transfer of matter.

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

Which of the following sentences about conduction is/are true?

  1. Metallic conduction decreases with increase in temperature

  2. Electrolytic conduction increases with increase in temperature

  3. Both of the above

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Electrolytic conduction occurs because of the flow of ions. As the temperature increases, the degree of ionization of the electrolyte also increases. Hence the flow of ions also increases. So, electrolytic conduction increases with the increase in temperature.
Metallic conduction occurs because of the flow of electrons. As the temperature rises the metal atoms vibrate more. And hence the resistance offered by the moving electrons also increases. Because of this resistance, the conduction decreases. So metallic conduction decreases with increase in temperature.

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

Which among the following solutions is NOT used in determination of the cell constant?

  1. ${ 10 }^{ -2 }MKCl$
  2. ${ 10 }^{ -1 }MKCl$
  3. $1 M KCl$
  4. Saturated $KCl$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Standard KCl solutions (like 0.1M or 0.01M) are used for cell constant determination because their conductivity is accurately known. Saturated KCl is not used because its concentration and conductivity can be unstable or difficult to reproduce precisely.

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

Metallic conduction involves:

  1. no chemical change

  2. flow of electrons

  3. transfer of matter

  4. conductance decreases with increase in temperature
Reveal answer Fill a bubble to check yourself
B,D Correct answer
Explanation

The substances which allow the flow of electric current are called conductors. The good metal conductors are copper, silver, tin, etc. 


It is due to the flow of electrons. It is not accompanied by the decomposition of the substance, only physical changes occur. It also does not involve the transfer of matter it is due to the flow of electrons. 

Conductivity decreases with an increase in temperature due to an increase in the number of collisions.

Hence, the correct options are $B$ and $D$

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

In Death valley,California,a conduction process was going on in an air conditioned room maintained at $30^0$.Suddenly there was a power cut and temperature started to rise and it was found that the conduction process got slower.The conduction type can be:

  1. electrolytic

  2. metallic

  3. any of these

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As temperature rises, thermal conductivity of metals decreases due to increase in molecular collisions.

Multiple choice metallic and electrolytic conduction electrolysis chemical reactions electrochemistry chemistry

Ionic conductance of ${ H }^{ + }$ and ${ SO } _{ 4 }^{ 2- }$ are $x$ and $yS\ { cm }^{ 2 }\ { mol }^{ -1 }$. Hence, equivalent conductivity of ${ H } _{ 2 }{ SO } _{ 4 }$ is:

  1. $2x+\cfrac { y }{ 2 } $
  2. $x+\cfrac { y }{ 2 } $
  3. $\cfrac { x }{ 2 } +y$
  4. $\cfrac { x }{ 2 } +\cfrac { y }{ 2 } $
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Equivalent conductance can be defined as the conductance produce by an equivalent of ion present in the solution.

For ${ H }^{ + }$, no.of ${ e }^{ - }$ change $=1$
For ${ SO } _{ 4 }^{ 2- }$, no.of ${ e }^{ - }$ change $=2$
Thus equivalent conductance of ${ H } _{ 2 }{ SO } _{ 4 }$
${ H } _{ 2 }{ SO } _{ 4 }$ $\rightleftharpoons 2{ H }^{ + }+{ SO } _{ 4 }^{ 2- }$
Eg Conductance $=\cfrac { 2[Ionic\quad conductance\quad of\quad { H }^{ + }] }{ nf } +\cfrac { Ionic\quad Conductance\quad of\quad { SO } _{ 4 }^{ 2- } }{ nf } $
Eg. Conductance $=2\times \cfrac { x }{ 1 } s{ cm }^{ 2 }+\cfrac { y }{ 2 } s{ cm }^{ 2 }$
Eg. Conductance $=2x+\cfrac { y }{ 2 }$