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Electrochemistry JEE

The Quiz is a JEE mains Level quiz containing 25 questions.

In 25 questions 15 questions are single choice, 6 questions are Assertion reasons type, 04 questions are Match the following type,

The time allotted for the quiz is 60 minutes.

The number of attempts remaining is 3

1 / 25

1. Statement I: Conductivity of pure water is 3.5 x 10^-5 S m⁻¹
Statement II: High amounts of hydrogen and hydroxyl ions are present in water.

a) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

b) Statement I is false, Statement II is true.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is true, Statement II is false.

2 / 25

2. Consider the following graph.

electro15

Here the limiting molar conductivity is:

a) 148.6

b) 87.46

c) 150

d) 147

3 / 25

3. The electrode potentials for

Cu⁺² _(aq) + e^-1 → Cu⁺¹ _(aq₎ and

Cu⁺¹ _(aq) + e^-1 → Cu _(s₎, are + 0.15 V and +0.50 V respectively. The value of E° Cu⁺²/Cu will be

a) 0. 650 V

b) 0.500 V

c) 0.150 V

d) 0.325 V

4 / 25

4. Statement I: Electrical conductance through metals is called electronic conductance.
Statement II: This is due to movement of electrons.

a) Statement I is false, Statement II is true.

b) Statement I is true, Statement II is false.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

5 / 25

5. Statement I: Conductivity always increases with decrease in concentration for strong and weak electrolytes.
Statement II: Number of ions per unit volume decreases on dilution.

a) Statement I is false, Statement II is true.

b) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is true, Statement II is false.

6 / 25

6. Two electrolytes X and Y are diluted. Λ _mof Y increases 1.5 times and for X it increases 25 times. Predict the strong electrolyte among X and Y.

a) Both X and Y

b) X

c) Y

d) There is no effect of dilution on nature of electrolyte

7 / 25

7. Match the items of Column I and Column II.

electro53

a) A →4; B → 3; C → 5; D → 1

b) A →3; B → 4; C → 5; D → 1

c) A →1; B → 4; C → 3; D → 2

d) A →4; B → 3; C → 5; D → 2

8 / 25

8. Statement I: Platinum and gold are used as inert electrodes.
Statement II: Pt and Au do not participate in the reaction and provide the surface for oxidation or reduction.

a) Statement I is true, Statement II is false.

b) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is false, Statement II is true.

9 / 25

9. KCl solution is generally used to determine the cell constant because:

a) Its conductivity is known accurately at various concentration and different temperatures.

b) All of these reasons.

c) It is highly ionic in nature.

d) Size of cations and anion are comparable

10 / 25

10. Match the items of Column I and Column II.

elecro51

a) A →3; B → 4; C → 1; D → 2

b) A →3; B → 4; C → 2; D → 1

c) A →4; B → 3; C → 2; D → 1

d) A →4; B → 3; C → 1; D → 2

11 / 25

11. As a lead storage battery is charged:

a) Lead electrode becomes coated with lead sulphate

b) Lead dioxide dissolves

c) Sulphuric acid is regenerated

d) The concentration of sulphuric acid decreases.

12 / 25

12. Statement I: Copper sulphate solution is stored in zinc pot.
Statement II: Zinc is more reactive than copper, so it displaces copper from copper sulphate solution.

a) Statement I is false, Statement II is true.

b) Statement I is true, Statement II is false.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

13 / 25

13. Match the following Column I (expressions) with Column II and choose the correct option from the codes given below.

Electro45

a) A →4; B → 1; C → 3; D → 2

b) A →3; B → 4; C → 2; D → 1

c) A →4; B → 3; C → 1; D → 2

d) A →3; B → 2; C → 4; D → 1

14 / 25

14. Consider the following cell reaction

electro06

the cell potential at 25°C is:

a) 1.47 V

b) 1.87 V

c) 1.57 V

d) 1.77 V

15 / 25

15. electro18

Calculate the limiting molar conductivity of NaCl and KBr from the above table.

a) NaCl → 126.4; KBr → 150.6

b) NaCl → 151.6; KBr → 126.4

c) NaCl → 126.4; KBr → 151.6

d) NaCl → 150.6; KBr → 126.4

16 / 25

16. Select the correct statement for the weak electrolyte:

a) They have higher degree of dissociation at higher concentration.

b) At infinite dilution, electrolyte dissociate completely but at such low concentration the conductivity of solution is low and cannot be measured accurately.

c) The change in Λ_m with dilution is due to decrease in the degree of dissociation and number of ions in the solution that contain electrolyte.

d) Λ_m increases steeply on dilution near high concentration.

17 / 25

17. If the E^°_cellfor a given reaction has a negative value, then which of the following gives the correct relationships for the values of ∆G^° and K_eq?

a) ∆G^o< 1; K_eq < 1

b) ∆G^o< 1; K_eq > 1

c) ∆G^o< 1; K_eq > 1

d) ∆G^o> 1; K_eq < 1

18 / 25

18. Conductivity (Unit Siemen's 'S') is directly proportional to area of the vessel and the concentration of the solution in it and is inversely proportional to the length of the vessel, then the unit of constant of proportionality is:

a) S m mol^-1

b) S^-2 m² mol

c) S² m² mol^-2

d) S m² mol^-1

19 / 25

19. For the generation of electrical potential of 1.1 V, the ideal concentration of zinc and copper ion (in mol dm ^-3) in the Galvanic cell is :

a) 2 and 1

b) 3 and 2

c) 1 and 1

d) 4 and 2

20 / 25

20. Statement I: Anhyd. HCl is bad conductor of electricity, while aq. HCl is good conductor.
Statement II: Aqueous HCl is not fully ionized but, Anhyd. HCl is ionized to produce H⁺¹ and Cl^-1 .

a) Statement I is true, Statement II is true; Statement II is NOT a correct explanation for statement-I.

b) Statement I is false, Statement II is true.

c) Statement I is true, Statement II is true; Statement II is the correct explanation for Statement I.

d) Statement I is true, Statement II is false.

21 / 25

21. Match the items of Column I and Column II.

electro52

a) A →4; B → 3; C → 1; D → 2

b) A →4; B → 3; C → 2; D → 1

c) A →3; B → 4; C → 1; D → 2

d) A →3; B → 4; C → 2; D → 1

22 / 25

22. Compound XA XB XC, are added into separate test tubes containing A, B, C solutions. XB react with A and C. XA does not react with any of these. XC reacts with A. Arrange the anion in the decreasing order of their oxidation.

a) B^-, A^-, C^-

b) A^-, B^-, C^-

c) B^-, C^-, A^-

d) C^-, A^-, B^-

23 / 25

23. The highest electrical conductivity of the following aqueous solutions is of:

a) 0.1 M acetic acid

b) 0.1 M difluoro acetic acid

c) 0.1 M chloroacetic acid

d) 0.1 M fluoro acetic acid

24 / 25

24. Standard electrode potential of three metals X, Y and Z are - + 1 2. V, 0. 5V and -30. V respectively. The reducing power of these metals will be:

a) Y >Z > X

b) Z > X > Y

c) Y > X > Z

d) X> Y > Z

25 / 25

25. A gas 'X' at 1 atm is bubbled through a solution containing a mixture of 1M Y^-1 and 1M Z^-1 at 25°C. If the reduction potential of Z > Y > X, then:

a) Y will oxidize X and not Z

b) Y will oxidize both Z and X

c) Y will reduce both X and Z

d) Y will oxidize Z and not X

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