Electrochemistry MCQ Questions for Class 12 Chemistry Chapter 3 with Answers

Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Chemistry book Chapter 3 Electrochemistry with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Electrochemistry. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

MCQ Questions for Class 12 Chemistry With Answers

Q1. Galvanised iron sheets are coated with

(i) Carbon
(ii) Copper
(iii) Zinc
(iv) Nickel

(iii) Zinc

Q2. The units of conductivity are:

(i) ohm-1
(ii) ohm-1 cm-1
(iii) ohm-2 cm² equiv-1
(iv) ohm-1 cm²

(ii)

Q3. Fused NaCl on electrolysis gives ………….. on cathode.

(i) Chlroine
(ii) Sodium
(iii) Sodium amalgam
(iv) Hydrogen

(ii) Sodium

Q4. Which of the following statements about the catalyst is true?

(i) A catalyst accelerates the rate of reaction by bringing down the activation energy.
(ii) A catalyst does not participate in reaction mechanism.
(iii) A catalyst makes the reaction feasible by making ∆G more negative.
(iv) A catalyst makes equilibrium constant more favourable for forward reaction.

(i) A catalyst accelerates the rate of reaction by bringing down the activation energy.

Q5. Which shows electrical conductance?

(i) Sodium
(ii) Diamond
(iii) Potassium
(iv) Graphite

(iv) Graphite

Q6. Which of the following is a secondary cell?

(i) Leclanche cell
(ii) Lead storage battery
(iii) Concentration cell
(iv) All of these

(ii) Lead storage battery

Q7. Which of the following describes a general solid?

(i) Compressible
(ii) Incompressible
(iii) Fluid
(iv) Semi-compressible

(ii) Incompressible

Q8. The Standard electrode potentials for the half cell reactions are as follows
Zn ? Zn2+ + 2e [E° = 0.41 V]
Fe ? Fe2+ + 2e [E° = 0.76 V]

(i) -0.35 V
(ii) 0.35 V
(iii) + 1.17 V
(iv) -1.17 V

(ii) 0.35 V

Q9. The specific conductance of 0.1 M NaCl solution is 1.06 × 10-2 ohm-1 cm-1. Its molar conductance in ohm-1 cm² mol-1 is

(i) 1.06 × 10²
(ii)1.06 × 10³
(iii) 1.06 × 104
(iv) 53

(i) 1.06 × 10²

Q10. Which of the following is a secondary cell?

(i) Leclanche cell
(ii) Lead storage battery
(iii) Concentration cell
(iv) All of these

(ii) Lead storage battery

Q11. For a chemical reaction A→B, it is found that the rate of reaction doubles when the concentration of A is increased four times. The order of reaction is

(i) Two
(ii) One
(iii) Half
(iv) Zero

(iii) Half

Q12. The products formed when an aqueous solution of NaBr is electrolysed in a cell having inert electrodes are:

(i) Na and Br2
(ii) Na and O2
(iii) H2 ,Br2 and NaOH
(iv) H2 and O2

(iii) H2 ,Br2 and NaOH

Q13. Which of the following is not a good conductor?

(i) Cu
(ii) NaCl (aq)
(iii) NaCl (molten)
(iv) NaCl(s)

(iv) NaCl(s)

Q14. Which of the following statements is incorrect about electrochemical cell?

(i) Electrons are released at anode.
(ii) Chemical energy is converted into electrical energy.
(iii) Salt bridge maintains the electrical neutrality of the electrolytes.
(iv) Cell can work indefinitely.

(iv) Cell can work indefinitely

Q15. Molar conductivity of 0.15 M solution of KCl at 298 K, if its conductivity of 0.0152 S cm-1 w ill be

(i) 124 Ω-1 cm² mol-1
(ii) 204 Ω-1 cm² mol-1
(iii) 101 Ω-1 cm² mol-1
(iv) 300 Ω-1 cm² mol-1

(iii)

Q16. The half life of the first order reaction having rate constant K = 1.7 x 10-5s-1 is

(i) 12.1 h
(ii) 9.7 h
(iii) 11.3 h
(iv) 1.8 h

(iii) 11.3 h

Q17. A 0.5 M NaOH solution offers a resistance of 31.6 ohm in a conductivity cell at room temperature. What shall be the approximate molar
conductance of this NaOH solution if cell constant of the cell is 0.367 cm–1.

(i) 234 S cm² mole–1
(ii) 23.2 S cm² mole–1
(iii) 4645 S cm² mole–1
(iv) 5464 S cm² mole–1

(iv)

Q18. Molar conductivity of 0.15 M solution of KCl at 298 K, if its conductivity of 0.0152 S cm-1 w ill be

(i) 124 Ω-1 cm² mol-1
(ii) 204 Ω-1 cm² mol-1
(iii) 101 Ω-1 cm² mol-1
(iv) 300 Ω-1 cm² mol-1

(iii)

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MCQ Questions for Class 12 Chemistry with Answers

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