JEE CHEMISTRY UNIT 07
QUIZ NO 2
TOTAL QUESTIONS = 20
1. The emf of a cell depends on
A. All of the above
B. Concentration
C. Temperature
D. Nature of electrodes
2. Which of the following is a secondary battery?
A. Lead-acid battery
B. Fuel cell
C. Mercury cell
D. Dry cell
3. In a redox reaction, the species that loses electrons is
A. Reduced
B. A catalyst
C. Oxidized
D. An oxidizing agent
4. The unit of molar conductivity is
A. S m^-1 mol^-1
B. S cm^-1
C. Ω cm^2 mol^-1
D. S cm^2 mol^-1
5. The oxidation state of chromium in K2Cr2O7 is
A. +2
B. +3
C. +7
D. +6
6. The standard electrode potential of a cell is represented by
A. E°cell = E°anode - E°cathode
B. E°cell = E°cathode × E°anode
C. E°cell = E°cathode + E°anode
D. E°cell = E°cathode - E°anode
7. The standard cell potential for Zn + Cu2+ → Zn2+ + Cu is
A. +0.76 V
B. +1.10 V
C. -1.10 V
D. -0.34 V
8. The unit of Faraday constant is
A. Moles per coulomb
B. Coulombs
C. Amperes
D. Coulombs per mole
9. Which of the following is an example of a secondary cell?
A. Mercury cell
B. Lead storage battery
C. Dry cell
D. Leclanché cell
10. Which of the following is not a redox reaction?
A. 2Fe + 3Cl2 → 2FeCl3
B. AgNO3 + NaCl → AgCl + NaNO3
C. 2Mg + O2 → 2MgO
D. Zn + CuSO4 → ZnSO4 + Cu
11. The equivalent weight of K2Cr2O7 in acidic medium is
A. M
B. M/3
C. M/6
D. M/2
12. Which of the following does not conduct electricity?
A. Aqueous NaCl
B. Solid NaCl
C. NaCl solution
D. Molten NaCl
13. Which of the following statements is true for electrolysis?
A. Cations are attracted to the anode
B. Anions are attracted to the cathode
C. Oxidation occurs at the cathode
D. Reduction occurs at the cathode
14. The unit of molar conductivity is
A. S cm^2 mol^-1
B. S m^-2 mol^-1
C. S cm^-1
D. S m^-1 mol^-1
15. The molar conductivity of a solution decreases with
A. Increase in concentration
B. Addition of a salt
C. Increase in temperature
D. Decrease in concentration
16. The equivalent mass of KMnO4 in acidic medium is
A. M/5
B. M/2
C. M/3
D. M
17. The function of a salt bridge is to
A. Maintain electrical neutrality
B. Decrease emf
C. Increase emf
D. Transfer electrons
18. The standard cell potential for the reaction Zn + Cu2+ → Zn2+ + Cu is
A. +1.10 V
B. -1.10 V
C. +0.34 V
D. -0.34 V
19. The standard electrode potential of Cu2+/Cu is +0.34 V. It indicates that
A. Cu is a good reducing agent
B. Cu2+ is less stable than Cu
C. Cu2+ is a good oxidizing agent
D. Cu is less stable than Cu2+
20. In a galvanic cell, the electrons flow from
A. Electrolyte to cathode
B. Electrolyte to anode
C. Anode to cathode
D. Cathode to anode
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