10-CHAPTER-ELECTROCHEMISTRY-MCQS

10-CHAPTER-ELECTROCHEMISTRY-MCQS - 1st year chemistry n0tes...

Info icon This preview shows pages 1–4. Sign up to view the full content.

1 st year chemistry n0tes new 1 CHAPTER 10 ELECTROCHEMISTRY MCQS Q.1 Electrolysis is the process in which a chemical reaction takes place at the expense of (a) chemical energy (b) electrical energy (c) heat energy (d) none of these Q.2 Standard hydrogen electrode has an arbitrarily fixed potential (a) 0.00 volt (b) 1.00 volt (c) 0.10 volt (d) none of these Q.3 The oxidation number of chromium in K2Cr2O7 is (a) 14 (b) 12 (c) 6 (d) none of these Q.4 In the reaction 2 Fe + Cl2 ( 2FeCl3 (a) Fe is reduced (b) Fe is oxidized (c) Cl2 is oxidized (d) none of these Q.5 When fused PbBr2 is electrolyzed (a) bromine appears at cathode (b) lead is deposited at the cathode (c) lead appears at the anode (d) none of these happens Q.6 When aqueous solution of NaCl is electrolysed (a) Cl2 is evolved at the cathode (b) H2 is evolved at cathode (c) Na is deposited at the cathode (d) Na appears at the anode Q.7 During electrolysis of KNO3, H2 is evolved at
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

1 st year chemistry n0tes new 2 (a) anode (b) cathode (c) both (a) and (b) (d) none of these Q.8 During electrolysis of CuSO4 (aq) using Cu electrodes Cu is deposited at (a) anode (b) cathode (c) both (a) and (b) (d) none of these Q.9 During electrolysis of fused NaCl, which of the following reaction occurs at anode (a) Cl ions oxidized (b) Cl ions reduced (c) Na+ ions oxidized (d) Na+ ions reduced Q.10 An electrochemical cell is based upon (a) acid base reaction (b) redox reaction (c) nuclear reaction (d) none of the above Q.11 Which one of the following will be good conductor of electricity (a) pure distilled water (b) molten NaCl (c) dilute solution of glucose (d) chloroform Q.12 Which one of the following represents the same net reaction as the electrolysis of aqueous H2SO4 (a) electrolysis of water (b) electrolysis of molten NaCl (c) electrolysis of aqueous HCl (d) electrolysis of aqueous NaCl Q.13 In a galvanic cell, the reaction occurs 2H2O ( O2 (g) + 4H+ + 4e It occurs at the (a) cathode (b) anode (c) cathode and anode (d) none of the above Q.14 Which statement below is not true for the reaction Fe3+ + e ( Fe2+
Image of page 2
1 st year chemistry n0tes new 3 (a) Fe3+ is reduced (b) oxidation state of Fe has changed (c) Fe3+ can act as an oxidizing agent (d) both Fe2+ and Fe3+ are called anions Q.15 During a redox reaction, an oxidizing agent (a) gains electrons (b) is oxidized (c) loses electrons (d) is hydrolysed Q.16 In a salt bridge KCl is used because (a) it is an electrolyte (b) K+ and Cl transfer easily (c) agar agar forms a good jelly with it (d) KCl is also present in the calomel electrode Q.17 A oxidizing agent is a substance which brings about (a) electron donation (b) oxidation (c) reduction (d) hydrolysis Q.18 In the electrolysis the process of oxidation occurs at (a) anode (b) cathode (c) both cathode and anode (d) in electrolytic solution Q.19 In an oxidation process the oxidation number of the element (a) increases
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern