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

Question # 2

When fused PbBr2 is electrolyzed :

Question # 3

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

Question # 4

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

Question # 5

Fe can displace Cu form CuSO4solution because

Question # 6

The two half cells of a galvanic cell are connected by

Question # 7

A half reaction can be defines as :

Question # 8

An electrochemical cell is based upon

Question # 9

A cell in which electric current is produced as a result spontaneous redox reaction is called :

Question # 10

K,Ca and Li metals may be arranged in decreasing order of their reduction potential as :

Question # 11

Which one of the following reaction takes place spontaneously

Question # 12

Pick out the wrong statement. In electrochemical cell

Question # 13

The specific conductance of 0.1 M NaCl solution is 1.06 x 10-2ohm-1mol-1. Its molar conductance in ohm-1cm2mol-1is

Question # 14

A solution of sodium sulphate was electrolysed using some insert electrodes. The products at the electrodes are

Question # 15

Which of the following is the use of electrolysis?

Question # 16

Which of the following (1 M) conducts more electricity?

Question # 17

Oxidation number of oxygen in OF2is

Question # 18

Which statement is incorrect for NICAD battery

Question # 19

For spontaneity of a cell, which is correct?

Question # 20

The difference of potential of two electrodes when concentration of solution is 1M each at 25°C and1 atm is called :

Question # 21

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

Question # 22

Lead accumulator stops discharging current when

Question # 23

In electrolytic cells, the chemical changes may be :

Question # 24

Metallic conduction is also called as :

Question # 25

When quantity of electricity passed is one faraday then the mass deposited at the electrode is equal to

Question # 26

When fused PbBr2is electrolyed then

Question # 27

Specific conductivity of a solution

Question # 28

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

Question # 29

Strong oxidizing agents have

Question # 30

In lead accumulator the electrolyte is H2SO4solution is

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ECAT Chemistry Chapter 10 Important MCQ's

Sr.# Question Answer
1 In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to
A. Generate heat
B. Remove adsorbed oxygen from electrode surfaces
C. Produce High purity water
D. Create potential difference between two electrodes
2 In electrolytic cells, the chemical changes may be :
A. Either spontaneous or non-spontaneous
B. Always spontaneous
C. Always non-spontaneous
D. More spontaneous and less non-spontaneous.
3 The amount of electricity that can deposit 108 g of silver from silver nitrate solution is
A. 1 ampere
B. 1 coulomb
C. 1 faraday
D. 2 ampere
4 Calculate the amount of charge flowing in 2 minute in a wire of resistance 10Ωwhen a potential difference of 20 V is applied
A. 120 C
B. 240 C
C. 20 C
D. 4 C
5 During electrolysis, the reaction that takes place at cathode is :
A. Reduction
B. Both (a) and (c)
C. Oxidation
D. No reaction occurs
6
Question Image
A. Cu
B. H
C. N
D. O
7 Most metals are conductors of electricity because of the :
A. Light weight.
B. Immobility of the electrons.
C. Lustrous surfaces
D. Relatively free movement of their electrons
8
Question Image
A. Zn
B. H
C. S
D. O
9 Ionization is the process in which ionic compounds when fused or dissolved in water split up into charged particles called :
A. Atoms.
B. Electrons.
C. Protons .
D. Ions
10 An electric current is passed through silver voltameter connected to a water voltmeter. The cathode of the silver voltameter is 0.108 g more at the end of the electrolysis. The volume of oxygen evolved at STP is
A. 56 cm3
B. 550 cm3
C. 5.6 cm3
D. 11.2 cm3

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