ECAT Pre Engineering Chemistry Chapter 10 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 10 Electrochemistry

Try The MCQ's Test For ECAT Chemistry Chapter 10 Electrochemistry

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ECAT Chemistry Chapter 10 Electrochemistry

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Question # 1

The oxidation number of Mn is KMnO4is

Question # 2

The cell which generates electricity as a result of spontaneous oxidation-reduction reaction is called

Question # 3

Which of the following yield both hydrogen and chlorine on electrolysis:

Question # 4

While balancing an equation by ion electron method, the number of oxygen atoms are balanced by

Question # 5

Which of the substances Na, Hg, S Pt and graphite can be used as electrodes in electrolytic cells having aqueous solution?

Question # 6

The voltaic or galvanic cells which cannot be recharged are called

Question # 7

The number of coulombs required for the deposition of 107.870 g of silver is

Question # 8

In KO2the oxidation state of oxygen is

Question # 9

Strong reducing agents gave

Question # 10

Which of the following statements is true about Galvanic cell

Question # 11

Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied

Question # 12

Electrochemistry is concerned with the conversion of electrical energy into chemical energy in :

Question # 13

During electrolysis, the reaction that takes place at cathode is :

Question # 14

A standard hydrogen electrode is used as standard electrode of which electrode potential is arbitrarily taken as

Question # 15

Ionization is the process in which ionic compounds when fused or dissolved in water split up into charged particles called :

Question # 16

The electrolysis of CuSO4aqueous solution using copper as cathode as well an anode the substance which deposits at cathode is

Question # 17

The oxidation number of chromium in K2Cr2O7is

Question # 18

Which of the following statement is incorrect about SHE(Standard hydrogen electrode):

Question # 19

Pure water does not conduct electricity because it

Question # 20

The process of electrical coating of one metal on another to protect, decorate or to have greater resistance to corrosion is called

Question # 21

Corrosion reaction are

Question # 22

Which statement is incorrect about standard hydrogen electrode

Question # 23

Metallic conduction is also called as :

Question # 24

In an electrolytic cell, the electrons flow from :

Question # 25

Sodium metal is obtained by the electrolysis of fused NaCl in cell is called

Question # 26

Strong oxidizing agents have

Question # 27

Silver oxide battery has a voltage of

Question # 28

In electrolysis of NaCl when Pt electrode is taken then H2is liberated at cathode while with Hg cathode it forms sodium amalgam

Question # 29

Which of the following correctly describes the process occurring at the electrodes when molten NaCl is electrolyzed:

Question # 30

A dry alkaline cell has porous Zn anode and MnO2as cathode the electrolyte used is

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ECAT Chemistry Chapter 10 Important MCQ's

Sr.# Question Answer
1 A current of 9.65 ampere flowing for 10 minutes deposits 3.0 g of the metal which is monovalent. The atomic mass of the metal is
A. 10
B. 50
C. 30
D. 96.5
2 Reaction takes place at anode is
A. Ionization
B. Reduction
C. Oxidation
D. Hydrolysis
3
Question Image
A. Iodine can oxidise iron
B. Bromine can oxidise iron
C. Iodine can oxidise bromine
D. Iron can oxidise bromine
4 In a Galvanic cell
A. Chemical energy is converted into electricity
B. Chemical energy is converted into heat
C. Electrical energy is converted into heat
D. Electrical energy is converted into chemical energy
5 The conversion of chemical energy into electrical energy requires :
A. Electrolytic cell
B. Galvanic cell
C. Voltaic cell
D. Both (b) and (c)
6 A standard hydrogen electrode (S.H.E) consists of a platinized platinum electrode dipped in 1 molar solution of H+ions and hydrogen gas is passed at a pressure of
A. One pascal
B. One kilo pascal
C. One atmoshpere
D. Then atmoshpere
7 The oxidation number of Mn is KMnO4is
A. +2
B. +4
C. +6
D. +7
8 Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H2gas when treated with acids because
A. These have very high positive values of reduction potentials
B. These have very high negative values of reduction potentials
C. Their ionization potentials are lowest
D. Their reduction potentials are close to SHE
9 During electrolysis, the reaction that takes place at cathode is :
A. Reduction
B. Both (a) and (c)
C. Oxidation
D. No reaction occurs
10 While balancing an equation by ion electron method, the number of oxygen atoms are balanced by
A. OH-
B. H2O
C. O2
D. H+

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