Interview Questions.

Question 1. Define An Electro Chemical Cell. Give One Example?

Answer :

A mobile which converts chemical power into electric energy is known as electrochemical cellular. Example: Daniel cell , Batteries.

Question 2. What Do You Mean By Redox Reaction?

Answer :

Both discount and oxidation takes location simultaneously in a mobile reaction then it is known as redox reaction of an electrochemical cell.

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Question 3. What Is Electrode Potential?

Answer :

It is the measure of tendency of a metal electrode to lose or benefit electrons, whilst it is in contact with its own salt answer. It is denoted as “E”

Question four. Define An Origin Of Electrode Potential?

Answer :

When a steel electrode is located in its very own salt solution, two sorts of reaction takes location.

 +ve ions might also skip into the answer. M → Mn+ + ne- (oxidation)
+ve ions from the solution may additionally deposit over the steel. Mn+ + ne-→M (reduction)
The above response takes location in an electrode then it is referred to as an beginning of electrode potential.

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Question 5. Define Oxidation Potential And Reduction Potential?

Answer :

Oxidation capability: The tendency of a metallic electrode to lose electrons.

Reduction capability: The tendency of a metallic electrode to advantage electrons.

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Question 6. How An Electrochemical Is Measured? Define Emf Of An Electrochemical Cell?

Answer :

It is measured with the aid of EMF.: “The difference of capability which causes flow of electrons from one electrode of better capability to the other electrode of lower electrode capability”.EMF= ER-EL

Question 7. What Are The Applications Of Electrochemical Cell?

Answer :

Determination of sparingly soluble salt.,Determination of the valency ion. Determination of preferred loose energy change and K.
Potentiometric titrations may be finished.,Hydrolysis constant may be determined.

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Question 8. Define Electrochemical Series?

Answer :

When diverse kinds of metallic electrodes are arranged of their increasing order of general reduction capability on the idea of hydrogen scale is referred to as emf collection.

Question 9. Write The Significance Of Electrochemical Series?

Answer :

To calculate the usual emf of the cell.,Relative ease of oxidation or discount.
Displacement of 1 element by the alternative., Hydrogen displacement conduct. Determination of equilibrium steady (K) for the reaction.

Question 10. Write The Mathematical Form Of Nernst Equation And Give One Application?

Answer :

E = Eo + 0.0591/n log [Mn+]

Application:

It is used to calculate electrode potential of unknown steel.
Corrosion tendency of metals may be predicted.
Applications of emf series.
Question 11. Define Corrosion?

Answer :

The gradual destruction of the metal or an alloy floor by means of the chemical or electrochemical reaction with its environment. (i.E) metal into steel oxide.

Question 12. What Are The Types Of Corrosion?

Answer :

Chemical corrosion. 
Electrochemical corrosion
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Question thirteen. What Are The Factors Which Affect Corrosion?

Answer :

Air and moisture.
Electrolytes in water.
Presence of impurities in metallic.
Presence of gases like CO2 and SO2
Differential aeration.
Question 14. Define Chemical Corrosion. What Are The Types Of Chemical Corrosion?

Answer :

It is known as dry corrosion. It is due to the neighborhood assault of steel surfaces with the aid of the atmospheric gases like oxygen,H2S,SO2 , N2, and many others.

3 types.

Oxidation Corrosion.
Corrosion through other gases.
Liquid-metallic corrosion.
Question 15. Define An Electrochemical Corrosion. What Are The Types Of Electrochemical Corrosion?

Answer :

It occurs due to the lifestyles of separate “anodic” and “cathodic” areas between which present day flows thru the undertaking solution. At anodic area oxidation takes place and anodic part of metallic is destroyed.

Galvanic corrosion.
Concentration cellular / Differential aeration corrosion.
Question sixteen. What Are The Differences Between Chemical And Electrochemical Corrosion?

Answer :

Chemical corrosion:

It happens dry country
Local attack to metallic by using surroundings
Chemical corrosion is self-managed
It follows adsorption mechanism
Ex: formation of mild scale on iron floor
Electrochemical corrosion:

Wet country (i.E) presence in moisture
Large variety of cathodic and anodic areas
It is continuous procedure
It follows electrochemical response
Ex: rusting of iron in moisture
Question 17. What Is Bed Worth Rule?

Answer :

The ratio of the quantity of the oxide fashioned to the volume of the steel consumed is pilling bed really worth rule

Question 18. Bolt And Nut Made Of The Same Metal Is Preferred In Practice . Why?

Answer :

Because the sort of aggregate will no longer allow galvanic corrosion to take vicinity.

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Question 19. What Are The Methods Used To Control The Corrosion?

Answer :

Sacrificial anode method 
Impressed current cathodic method
Question 20. What Is Paint?

Answer :

Paint is a mechanical dispersion of 1 or greater finely divided pigments in a medium (thinner + automobile) .When paint is applied to a steel surface, the thinner evaporates, even as the automobile undergoes slow oxidation forming a pigmented film.

Question 21. Differentiate Electroplating And Electro Less Plating?

Answer :

Electroplating:

It is done via passing current
Separate anode is employed
Anodic response is M  → Mn+ + ne-
Thickness of the plating is 1-100μm
Electroless plating:

Used lowering agent
Catalytic surface of the substrate acts as an anode
Anodic response is R → 0 + ne-
It has a thickness of one-100μm
Question 22. Define Electro Plating And Electroless Plating?

Answer :

Electro plating:

It?s a procedure wherein the coating steel is deposited on the base steel via passing an immediate modern-day through an electrolytic solution containing the soluble salt of the coating metallic.

Electro much less plating:

It is a way of depositing of a noble metal from its salt solution on a catalytically active surface of a base metal by using the use of a suitable lowering agent.