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

Lead accumulator contains

Question # 2

Corrosion reaction are

Question # 3

Which of the following will be good conductor of electricity

Question # 4

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

Question # 5

Matals usually conduct electricity because

Question # 6

During redox reaction an oxidizing agent

Question # 7

Which statement is incorrect for NICAD battery

Question # 8

If a salt bridge is removed between the two half cells, the voltage

Question # 9

Alkaline battery has a voltage of

Question # 10

The value of SHE is cathode and anode is always taken to be

Question # 11

When during electrolysis of a solution of AgNO3, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be

Question # 12

Which of the following is the use of electrolysis?

Question # 13

For spontaneity of a cell, which is correct?

Question # 14

Zn does not displace Mg from MgSO4solution because

Question # 15

Coupling of Pb with its Pb++/Pb = -0.13 V and Ag with Ag+/ Ag = +0.80 V, the cell reaction

Question # 16

Which statement is incorrect for balancing of redox reactions by ion-electron method

Question # 17

When fused PbBr2is electrolyzed

Question # 18

Time required to deposit one millimole of aluminium metal by the passage of 9.65 amperes through molten electrolyte containing aluminium ion is

Question # 19

Best way to prevent rusting of iron is by

Question # 20

96500 C of electricity liberates from CuSO4solution

Question # 21

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

Question # 22

A cell constant is generally found by measuring the conductivity of aqueous solution of

Question # 23

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

Question # 24

In the reaction K2Cr2O7+ HCl + CrCl3+ Cl2+ H2O the element which is reduced is

Question # 25

In electrolytic cells, the chemical changes may be :

Question # 26

Strong oxidizing agents have

Question # 27

In a Galvanic cell, the electrons flow from

Question # 28

Metals like Fe, Mg, Al, Cr, Zn have more negative reduction potentials that is whey

Question # 29

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

Question # 30

During electrolysis, electrons are :

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ECAT Chemistry Chapter 10 Important MCQ's

Sr.# Question Answer
1 Metals like Fe, Mg, Al, Cr, Zn have more negative reduction potentials that is whey
A. These don't react with steam
B. These react very slowly with steam to liberate H2gas
C. These react rapidly with steam to produce the metallic oxides and liberate H2gas
D. These react with cold water violently
2
Question Image
A. Fe is reduced
B. Fe is oxidized
C. Cl2is oxidized
D. None of these
3 Silver oxide battery has a voltage of
A. 2.0 V
B. 1.5 V
C. 2.5 V
D. 1.0 V
4 Which of the following yield both hydrogen and chlorine on electrolysis:
A. Electrolysis of acidified water.
B. Electrolysis of molten NaCl
C. Electrolysis of aqueous NaCl
D. Electrolysis of saline water
5 Electrolysis is used for :
A. Manufacture of caustic soda
B. Refining of copper
C. Electroplating
D. All of above
6
Question Image
A. Adding H2O and H+ions
B. Adding OH-ions
C. Adding O2molecules
D. Adding O atoms
7 The substance having highest conductivity at room temperature among the following is
A. 0.1 N HCl
B. 0.1 N NaCl
C. Graphite
D. Glass
8 Cell potential depends upon :
A. Concentration of ions
B. Nature of electrolyte
C. Temperature
D. All of above
9 During electrolysis, electrons are :
A. Lost by anions and gained by cations
B. Gained by anions and lost by cations
C. Gained only
D. Lost only
10 The galvanic or voltaic cells which are rechargeable called as
A. Primary cells
B. Secondary cells
C. Dry cells
D. Infinite cells

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