Electrochemistry With Answers

Electrochemistry

Sr. # Questions Answers Choice
1 Standard electrode potential is measured under 100 oC and 1 atm 0 oC and 1 M concentration  25 oC and 1 M concentration  100 oC and 1 M concentration 
2 Cell potential is the differecne between  Temperature and pressure Concentration of ions Electrode potentials of chathode and anode Mass of electrodes
3 A salt bridge is usually made from Metallic wires Porous glass Inert salt solution in agar agar Hydrochloric acid
4 A Daniell cell produces electricity through Electrolysis Radioactivity Spontaneous redox reaction Endothermic reaction
5 In electolysis, reduction always occurs at Anode Cathode Salt bridge Electroyte
6 The anode is electrolysis of molten NaCl is Na+ Cl- Na H-
7 The cathode in an electrolytic cell is. Positive electrode Negative electrode Neutral elecrode None
8 Standard hydrogen electrode is assigned potential of. 1.0 V 0.5 V 0.0 V -1.0 V
9 Which component maintains elecrical neutrality in an electronchemical cell Salt bridge Voltmeter Electrolyte Electrodes
10 Electrons in a galvanic cell flow from Anode to cathode Cathode to anode Salt bridge to cathode Elecrolyte to anode
11 In a galvanic cell, the anode is Negaive and site of oxidation  Postive and site of oxidation  Negative and site of reduction  Postive and site of reduction
12 In redox reactions, oxidizing agents are reduced Oxidized Always metals Always gases
13 The reducing agent in a redox reaction Gains electrons Loss electrons Acceptw protons Donates protons
14 Redox reactions always involve. Gain of protons Transfer of electrons Loss ofneutrons Nuclear change
15 The oxidation number of sulfur in H2SO4 is +2 +4 +6 +8
16 Oxidation numebrof oxygen in H2O 1 -2 0 +1
17 Which species is educed in the followig rection ? Zn + Cu --------- Zn Cu2+ Zn Cu Zn3+
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