Electrochemistry With Answers

Electrochemistry

Sr. # Questions Answers Choice
1 An Increase in temperature generally No Effect Increases cell voltage Decreases ell voltage Depends on pressure
2 The reaction at the cathode is alwyas Oxidation  Neutral Reduction  Ionization 
3 Electrochemical sereis helps in predicting. Rate of reaction Type of bond Dirction of redox reactions Heat released
4 In an electrochecmial cell, which ion migrates to cathode through the salt bridge. Anions Cations Eletrons Protons
5 For a redox reaction to be spontaneous, Delga G should be Positive Negative Zero Constant
6 Whcih metal will displace Cu from CuSO4 Solution. Zn Ag Hg Pb
7 What is the unit of cell potanetial. ampere Volt Ohm Farad
8 If Eo cell is +1.10 V , the reactio is Spontaneous Non spontaneous At equibrium Endothermic only
9 Electrochemical cells convert chemical energy into  Electrila energy Heat Light Nuclear energy
10 In the Hall Heroult process, aluminum is obtained by  Chemical reaction Thermal decomposition  Elelctrolysis of alumina Roasting and leaching
11 Down cell is used for extractio of. Zinc Iron Sodium Aluminum
12 Electroysis of brine produces. Hydrogen, oxygen , NaOH Sodium, Chlorine , H2O Hydrogen, Chlorine, NaOH NaOH , Cl2, CO2
13 Which of the following is not a use of electrochemistry Manufacture of explosives Electroplating Extractio of metals Electrorefining
14 The metal depostied at cathode during electolysis of NaCl is. Cl2 Na H2 Cu
15 The process of purifying copper using electricity is called. Electrolysis Electrplating Electrorefinging Electrogavimetry
16 Electroysis is used in the extration of Silver Gold Aluminum Mercury
17 In electroplating the object to be plated is connected to Anode Cathode Both electordes Electrolyte
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