Electrochemistry Test

Result

Electrochemistry Test - 25

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Weekly Quiz Competition

Question 1
4 / -1

The standard reduction potential at 298 K for the following half reactions are given against each:

A
Zn (s)

B
Cr (s)

C
H₂ (g)

D
Fe²⁺ (aq)
Question 2
4 / -1

The number of electrons involed in the reaction when a Faraday of electricity is passed through an electrolyte in solution is

A

B
96540

C

D
Question 3
4 / -1

Faraday’s laws of electrolysis are related to

A
atomic number of the cation

B
atomic number of anion

C
equivalent weight of the electrolyte

D
speed of the cation
Question 4
4 / -1

The amount of ion discharged during electrolysis is not directly proportional to

A
Resistance

B
Time

C
Current

D
Chemical equivalent of the ion.
Question 5
4 / -1

An electrolyte is one

A
Which conducts electric current in any solvent

B
Which is capable of ionisation by passing electric current

C
which dissociates into ions by dissolving in a suitable solvent

D
none of the above
Question 6
4 / -1

When a lead storage battery is discharged

A
SO₂ is evolved

B
lead sulphate is consumed

C
lead is formed

D
sulphuric acid is consumed
Question 7
4 / -1

When a copper wire is placed in a solution of AgNO₃, the solution acquires blue colour. This is due to the formation of

A
Cu²⁺ ions

B
Cu⁺ ions

C
Soluble complex of copper with AgNO₃

D
Cu^‒ ion by the reduction Cu.
Question 8
4 / -1

One faraday is equal to

A
69500 coulombs

B
99500 coulombs

C
96500 coulombs approximately

D
None of the above
Question 9
4 / -1

For measuring the conductivity of an electrolyte, its solution should be prepared in

A
tap water

B
Distilled water

C
Conductivity water

D
Polywater
Question 10
4 / -1

K, Ca and Li metals may be arranged in the decreasing order of their standard electrode potential as

A
K, Ca, Li

B
Li, K, Ca

C
Li, Ca, K

D
Ca, K, Li