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 electrode through which the electrons enter the electrolytic solution is electrolytic solution is

Question # 2

Sodium can be obtained by :

Question # 3

Electrolysis is used for :

Question # 4

The reference calomel electrode is made from which of the following?

Question # 5

In KO2the oxidation state of oxygen is

Question # 6

If the standard electrode potential of CU2+/Cu electrode is 0.34 V, what is the electrode potential of 0.01 M concentration of Cu2+? (T=298)

Question # 7

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

Question # 8

An electric current is passed through silver nitrate solution using silver electrodes.10.79 g of silver was found to be deposited on the cathode if the same amount of electricity is passed through copper sulphate solution using copper electrodes, the weight of copper deposited on the cathode is

Question # 9

If the salt bridge is not used between two half cells, then the voltage

Question # 10

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

Question # 11

In a solution of CuSO4how much time will be required to precipitate 2g copper by 0.5 ampere current?

Question # 12

Oxidation number of oxygen in OF2is

Question # 13

In a Galvanic cell

Question # 14

Corrosion reaction are

Question # 15

What are the products electrolysis of aqueous sodium chloride at two electrodes

Question # 16

The function of salt bridge is :

Question # 17

Reduction or oxidation potential of standard hydrogen electrode is :

Question # 18

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

Question # 19

When fused PbBr2is electrolyzed

Question # 20

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

Question # 21

A cell in which spontaneous redox reaction generates an electric current is called

Question # 22

An electrochemical cell is based upon

Question # 23

The substance having highest conductivity at room temperature among the following is

Question # 24

Li has the lowest reduction potential while the element with highest reduction potential is

Question # 25

Purification of an impure copper is made by electrolytic cell, in which impure copper is anode and pure copper is cathode, and the electrolyte used is

Question # 26

Pure water does not conduct electricity because it

Question # 27

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 # 28

In lead accumulator the electrolyte is H2SO4solution is

Question # 29

An electrolyte

Question # 30

Out of Cu, Ag, Fe and Zn the metal which can displace all others from theri salt solution is

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ECAT Chemistry Chapter 10 Important MCQ's

Sr.# Question Answer
1 Which of the following (1 M) conducts more electricity?
A. Sulphuric acid
B. Boric acid
C. Nitric acid
D. Phosphorus acid
2 Electrolytes in the form of solution or in the fused state have the ability to conduct :
A. Light.
B. Electricity.
C. Ions.
D. Electrons.
3 Strong oxidizing agents have
A. Greater positive value of standard reduction potential
B. Lesser positive value of standard
C. Greater negative value of standard
D. None of these
4 A half reaction can be defines as :
A. It always occurs at cathode.
B. Involves only half of a mole of electrolyte.
C. Occurs at one of the electrode.
D. Goes only half way to completion.
5 The galvanic or voltaic cells which are rechargeable called as
A. Primary cells
B. Secondary cells
C. Dry cells
D. Infinite cells
6 Sodium metal is obtained by the electrolysis of fused NaCl in cell is called
A. Nelson's cell
B. Down's cell
C. Daniell cell
D. Voltaic cell
7 An electrochemical cell is based upon
A. Acid-base reaction
B. Redox reaction
C. Nuclear reaction
D. None of the above
8 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
9 Which of the following correctly describes the process occurring at the electrodes when molten NaCl is electrolyzed:
A. No reaction at anode, reduction at cathode.
B. No reaction at cathode, oxidation at anode.
C. Oxidation at anodes, reduction at cathode.
D. Oxidation at cathode, reduction at anode.
10 Which statement is correct for the fuel cells
A. These cells operate at low temperature
B. These cells operate at low temperature
C. No catalyst used for the formation of water
D. MnO2is used as electrolyte

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