Electrochemistry  MCQs

MCQs of Electrochemistry

Showing 21 to 30 out of 158 Questions
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21.
The reaction of electrochemical cell will stop after sometime because _____
(a) potential of both electrodes becomes zero.
(b) potential of both electrodes becomes equal.
(c) one of the electrode is completely corroded.
(d) reaction will occur in opposite direction.
Answer:

Option (c)

22.
The solution of AgNO3 cannot be filled in copper container, why ?
(a) E°AgΙAg+ > E°CuΙCu2+
(b) E°CuΙCu2+ > E°AgΙAg+
(c) AgNO3 is an acidic solution
(d) E°Cu2+ΙCu > E°Ag+ΙAg
Answer:

Option (b)

23.
What will be the mole ratio of Cu, Ag and Al respectively, when 1 mole electrons passed through CuSO4, AgNO3 and AlCl3 solution ?
(a) 1 : 1 : 1
(b) 1 : 2 : 3
(c) 2 : 1 : 3
(d) 3 : 6 : 2
Answer:

Option (d)

24.
Pick the correct formula for the efficiency of cell in % ?
(a) Exp. value of productTheoretical value of product×100
(b) Theoretical value of productPractical value of product
(c) Theoretical value of productPractical value of product×100
(d) None of these
Answer:

Option (a)

25.
1 Faraday _____ Coulomb.
(a) 96000
(b) 96487
(c) 96847
(d) 96748
Answer:

Option (b)

26.
The electricity conducted by 1 mole electron is called _____
(a) 1 Joule
(b) 1 volt
(c) 1 Faraday
(d) 1 coulomb
Answer:

Option (c)

27.
If l = length, R = Resistance & A = area of cross section then _____
(a) R∝lA
(b) R∝lρA
(c) R∝1l
(d) R∝lA
Answer:

Option (a)

28.
Which is the correct formula to get molar conductance ?
(a) K×1000C
(b) CK×1000
(c) K=Aρ
(d) Λm=KC
Answer:

Option (a)

29.
Which of the following is not an semiconductor ?
(a) Ga
(b) Si
(c) Ge
(d) Gd
Answer:

Option (d)

30.
Ω-1•Cm-1 is unit of _____
(a) Specific conductivity (conductance)
(b) Molar conductivity
(c) Resistance
(d) Equivalent conductance
Answer:

Option (a)

Showing 21 to 30 out of 158 Questions
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