Electrochemistry test 7

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A test from chapter 10 i.e Electrochemistry of chemsitry part 1. This is Free online test for FSc and Entry test Preparation for UET, NUST, FAST, GIKI, PIEAS, NFC, Punjab University, UHS, other Engineering Universities and Medical Colleges.

1. An electrochemical cell is based upon

A) acid–base reaction
B) redox reaction
C) nuclear reaction
D) none

2. 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

3. Standard hydrogen electrode has an arbitrarily fixed potential

A) 0.00 v
B) 1.00 v
C) 0.10 v
D) none

4. The oxidation number of chromium in K2Cr2O7 is

A) 14
B) 12
C) 6
D) none

5. In the reaction 2 Fe + Cl2 ( 2FeCl3

A) Fe is reduced
B) Fe is oxidized
C) Cl2 is oxidized
D) none

6. 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

7. 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

8. During electrolysis of KNO3, H2 is evolved at

A) anode
B) cathode
C) both
D) none

9. During electrolysis of CuSO4 (aq) using Cu electrodes Cu is deposited at

A) anode
B) cathode
C) both
D) none

10. 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