Electrochemistry MCQs

Option A: 0.76

Option B: -0.76

Option C: -0.55

Option D: 0.55

Correct Answer: 0.76 ✔

Option A: 7

Option B: 6

Option C: -7

Option D: -6

Correct Answer: 6 ✔

Option A: valency

Option B: coordination number

Option C: oxidation number

Option D: charge number

Correct Answer: oxidation number ✔

Option A: MnO2

Option B: Zn

Option C: AgO2

Option D: cadmium

Correct Answer: Zn ✔

Option A: 1.25g/cm3

Option B: 1.3g/cm3

Option C: 1.20g/cm3

Option D: 1.15g/cm3

Correct Answer: 1.25g/cm3 ✔

Option A: rechargeable

Option B: non rechargeable

Option C: electrolytic cell

Option D: Daniel cell

Correct Answer: rechargeable ✔

Option A: to get oxidized

Option B: to get reduced

Option C: to accept electrons

Option D: both B and C

Correct Answer: both B and C ✔

Option A: higher

Option B: lower

Option C: in middle

Option D: no effect of position

Correct Answer: higher ✔

Option A: oxidation

Option B: reduction

Option C: oxidation-reduction

Option D: depends on the nature of the coupled electrode

Correct Answer: depends on the nature of the coupled electrode ✔

Option A: zero

Option B: unity

Option C: constant

Option D: multiple of 1

Correct Answer: zero ✔

Option A: New electrode of same element

Option B: SHE

Option C: 1M solution of ions of respective element

Option D: 2M solution of HCI

Correct Answer: SHE ✔

Option A: electrons

Option B: anion

Option C: current

Option D: ions

Correct Answer: ions ✔

Option A: A1

Option B: Zn

Option C: Cu

Option D: Fe

Correct Answer: Cu ✔

Option A: oxidation

Option B: reduction

Option C: oxidation-reduction

Option D: all of above represent same entity

Correct Answer: reduction ✔

Option A: oxidation

Option B: reduction

Option C: redox

Option D: decomposition

Correct Answer: oxidation ✔

Option A: free electrons

Option B: ions

Option C: metals

Option D: electrodes

Correct Answer: ions ✔

Option A: Pressure increases

Option B: Dilution decreases

Option C: Dilution increases

Option D: None

Correct Answer: Dilution increases ✔

Option A: The flow of electrons takes place from copper to zinc

Option B: E0red of copper electrode is less than that of zinc electrode

Option C: Zinc acts as an anode and copper as cathode

Option D: All are correct

Correct Answer: Zinc acts as an anode and copper as cathode ✔

Option A: Lead storage battery

Option B: Silver oxide cell

Option C: Fuel cell

Option D: Ni-Cd cell

Correct Answer: Silver oxide cell ✔

Option A: Oxidation potential

Option B: Reduction potential

Option C: Redox potential

Option D: emf of cell

Correct Answer: Reduction potential ✔

CCu
B. Ag
C. Pt
D. None

Correct Answer: Pt ✔

Option A: wire

Option B: salt bridge

Option C: electric circuit

Option D: no connection exists

Correct Answer: salt bridge ✔

Option A: 40%

Option B: 25%

Option C: 30%

Option D: 50%

Correct Answer: 30% ✔

Option A: irreversible cell

Option B: reversible cell

Option C: alkaline cell

Option D: all of the above

Correct Answer: all of the above ✔

Option A: 2M

Option B: 1N

Option C: 1m

Option D: 1M

Correct Answer: 1M ✔

Option A: 1.5 volts

Option B: 2 volts

Option C: 3 volts

Option D: 1 volts

Correct Answer: 2 volts ✔

Option A: secondary cell

Option B: primary cell

Option C: voltaic cell

Option D: both A & C

Correct Answer: both A & C ✔

Option A: to form positive ions

Option B: to form negative ions

Option C: gain electrons

Option D: all are possible

Correct Answer: to form positive ions ✔

Option A: greater

Option B: lesser

Option C: sum of reduction and oxidation potentials

Option D: none

Correct Answer: greater ✔

Option A: periodic table

Option B: groups

Option C: periods

Option D: electrochemical series

Correct Answer: electrochemical series ✔

Option A: KOH

Option B: KCI

Option C: KNO3

Option D: KBr

Correct Answer: KCI ✔

Option A: 760mm of Hg

Option B: 750mm of Hg

Option C: 780mm of Hg

Option D: 800mm of Hg

Correct Answer: 760mm of Hg ✔

Option A: by addition of fresh solution

Option B: by replacing external circuit with external source of electricity

Option C: by removal of solution

Option D: by heating it

Correct Answer: by replacing external circuit with external source of electricity ✔

Option A: Daniel cell

Option B: Downs cell

Option C: Voltaic cell

Option D: Nelsons cell

Correct Answer: Voltaic cell ✔

Option A: 1 M ZnO solution

Option B: 1 M ZnSO4 solution

Option C: 1.5 M ZnSO4 solution

Option D: 0.1 M ZnSO4 solution

Correct Answer: 1 M ZnSO4 solution ✔

Option A: external electric circuit

Option B: salt bridge

Option C: movement of ions

Option D: all of the above

Correct Answer: external electric circuit ✔

Option A: spontaneous reaction

Option B: non-wpontaneous reaction

Option C: neutralization

Option D: all of above

Correct Answer: non-wpontaneous reaction ✔

Option A: neutralization

Option B: oxidation

Option C: reduction

Option D: both B & C

Correct Answer: both B & C ✔

Option A: Free electrons

Option B: Free molecules

Option C: Free ions

Option D: Atoms of Na and Cl

Correct Answer: Free ions ✔

Option A: Chemical energy is converted into electricity

Option B: Chemical energy is converted into heat

Option C: Electrical energy is converted into chemical energy

Option D: Electrical energy is converted into heat

Correct Answer: Chemical energy is converted into electricity ✔

Option A: From cathode to anode in outer circuit

Option B: From anode to cathode outside the cell

Option C: From cathode to anode inside the cell

Option D: both B & C

Correct Answer: From anode to cathode outside the cell ✔

Option A: N

Option B: Cr

Option C: S

Option D: Mn

Correct Answer: Mn ✔

Option A: H2 is deposited at cathode

Option B: Colour of the solution becomes fade

Option C: Cu is deposited at anode

Option D: All are possible

Correct Answer: Colour of the solution becomes fade ✔