Electrochemistry Test

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Electrochemistry Test - 16

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Question 1
1 / -0

Electrolysis is due to the ______ effect of electric current.

A
chemical

B
heating

C
mechanical

D
none

Solution

Electrolysis is an electro-chemical process in which current is passed between two electrodes through an ionized solution (electrolyte) to deposit positive ions (anions) on the negative electrode (cathode) and negative ions (cations) on the positive electrode (anode).
So we can say that electrolysis is due to the chemical effect of electric current.
Therefore, A is correct option
Question 2
1 / -0

The compounds which decompose on passage of an electric current through them are known as :

A
electrolytes

B
non-electrolytes

C
electrolytically compounds

D
non-electrolytically compounds

Solution

The compounds which decompose on passage of an electric current through them are known as electrolytes. e.g water, strong acids, strong bases
Question 3
1 / -0

An article made of an ordinary metal is desired to be coated with gold by electroplating, then gold has to be:

A
Made as the electrolyte of the electrolytic cell.

B
Made as the anode of an electrolytic cell.

C
Made as the connecting wire in the electrolytic cell.

D
Kept immersed in the electrolyte solution.

Solution

Electroplating is a process for coating a conductive object with a thin layer of a material, such as a metal. An electrical current is used to reduce cations of a desired material from a solution onto the object. Electroplating is primarily used for depositing a layer of material to bestow a desired property (e.g., abrasion , wear resistance, corrosion protection, lubricity, aesthetic qualities, etc.) to a surface that otherwise lacks that property. Another application uses electroplating to build up thickness on undersized parts.An article made of an ordinary metal is desired to be coated with gold by electroplating, then gold has to be made as the anode of an electrolytic cell.
Question 4
1 / -0

Lead acid cell and alkalic cells are

A
Storage cells

B
Accumulators

C
Secondary cells

D
All of these
Question 5
1 / -0

The process used to decompose compounds using electric current is called :

A
electrolysis

B
electrification

C
currents

D
electrolytic process

Solution

The process used to decompose compounds using electric current is called electrolysis.
Question 6
1 / -0

The most common industrial application of chemical effects of electric current is

A
electroplating

B
galvanising

C
anodising

D
electrolysis

Solution

The process of depositing a layer of any desired metal on another material by means of electricity is called electroplating. It is one of the most common applications of chemical effects of electric current.
Electroplating is a very useful process. It is widely used in industry for coating metal objects with a thin layer of a different metal.
Question 7
1 / -0

A Faraday is:

A
the magnitude of the charge of 1 mole of electrons.

B
the magnitude of the electric dipole.

C
a fundamental constant of nature equal to $$\displaystyle 6.63\times { 10 }^{ -34 }Js/photon$$.

D
a constant that accounts for the existence of ions in solution.

Solution

The Faraday constant represents the amount of electric charge carried by one mole, or Avogadro's number, of electrons.
Question 8
1 / -0

Tin cans, used for storing food are made by electroplating

A
chrome onto tin

B
iron onto tin

C
tin onto iron

D
chrome onto iron

Solution

Tin cans, used for storing food, are made by electroplating tin onto iron. Tin
is less reactive than iron. Thus, food does not come into contact with iron and
is protected from getting spoilt.
Question 9
1 / -0

The compounds which do not decompose on passage of an electric current through them are known as:

A
electrolytes

B
non-electrolytes

C
electrolytically compounds

D
non-electrolytically compounds

Solution

The compounds which do not decompose on passage of an electric current through them are known as non-electrolytes. e.g distilled water
Question 10
1 / -0

Select incorrect statement

A
If salt-bridge is removed, potential falls to zero

B
Liquid-junction potential developed across the boundary of the two solutions of different concentration cells are used

C
Calomel electrode contains calcium chloride solution in contact with $$Pt$$ electrode

D
Quinhydrone electrode is reversible to $${H}^{+}$$

Solution

Calomel eletrode contains calomel paste $$({Hg}_{2}{Cl}_{2})$$ in contact with $$Hg(l)$$ and $$(aq)KCl$$ solution. $$Pt$$ electrode is dipped to make contact.

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Re-Attempt Weekly Quiz Competition

Electrochemistry Test - 16

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Electrochemistry Test - 16

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SHARING IS CARING

Question 1

chemical

heating

mechanical

none

Solution

Question 2

electrolytes

non-electrolytes

electrolytically compounds

non-electrolytically compounds

Solution

Question 3

Made as the electrolyte of the electrolytic cell.

Made as the anode of an electrolytic cell.

Made as the connecting wire in the electrolytic cell.

Kept immersed in the electrolyte solution.

Solution

Question 4

Storage cells

Accumulators

Secondary cells

All of these

Question 5

electrolysis

electrification

currents

electrolytic process

Solution

Question 6

electroplating

galvanising

anodising

electrolysis

Solution

Question 7

the magnitude of the charge of 1 mole of electrons.

the magnitude of the electric dipole.

a fundamental constant of nature equal to $$\displaystyle 6.63\times { 10 }^{ -34 }Js/photon$$.

a constant that accounts for the existence of ions in solution.

Solution

Question 8

chrome onto tin

iron onto tin

tin onto iron

chrome onto iron

Solution

Question 9

electrolytes

non-electrolytes

electrolytically compounds

non-electrolytically compounds

Solution

Question 10

If salt-bridge is removed, potential falls to zero

Liquid-junction potential developed across the boundary of the two solutions of different concentration cells are used

Calomel electrode contains calcium chloride solution in contact with $$Pt$$ electrode

Quinhydrone electrode is reversible to $${H}^{+}$$

Solution

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