ECAT Pre Engineering Chemistry Chapter 10 MCQ Test With Answer

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ECAT Class Chemistry Chapter 10 Important MCQ's

Sr.#	Question	Answer
1	Which statement is incorrect for balancing of redox reactions by ion-electron method	A. The reaction is splitted into two half reactions B. H₂O and H⁺ions are added for acidic or neutral reaction to balance O and H atoms C. To balance H, HCi, is added D. To balance O and H in the alkaline reaction OH^-added
2	Metals which are above SHE in electrochemical series	A. Can liberate H₂from acid B. Cannot liberate H₂from acid C. Cannot always liberate H₂from acid 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 (1 M) conducts more electricity?	A. Sulphuric acid B. Boric acid C. Nitric acid D. Phosphorus acid
5	The oxidation number of H is -1 in the compound	A. H₂O B. H₃BO₃ C. NaOH D. NaH
6	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
7	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	A. 1.08 g B. 10.8 g C. 21.6 g D. 108 g
8	The galvanic or voltaic cells which are rechargeable called as	A. Primary cells B. Secondary cells C. Dry cells D. Infinite cells
9	An electrochemical cell is based upon	A. Acid-base reaction B. Redox reaction C. Nuclear reaction D. None of the above
10		A. -1.10 V B. +1.10 V C. -0.42 V D. +0.42 V

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ECAT Pre Engineering Chemistry Chapter 10 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 10 Electrochemistry

ECAT Chemistry Chapter 10 Electrochemistry

Which of the following is a strong electrolyte?

2.5 faradays of electricity is passed through solution of CuSO4. The number of gram equivalents of copper deposited on the cathode would be

In KO2the oxidation state of oxygen is

When aqueous NaCl is electrolyzed, which of the following ions get discharged at anode :

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

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

The conductivity of strong electrolyte

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

In an electrolytic cell, the electrons flow from :

The best electrode used in salt bridge is KCl. Which other electrolyte an also be used for the purpose :

During electrolysis of KNO3, H2is evolved

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

Best way to prevent rusting of iron is by

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

Cell in which an electric current drives a non-spontaneous reaction is called

In electrolytic cells, the chemical changes may be :

The reduction potential to copper electrode is +0.34 V and that of Zn electrode is -0.76 V. when these two are coupled the e.m.f. of the cell is

Which one of the following reaction takes place spontaneously

In passage of electricity through aqueous solution of AgNO3silver dissolves at anode to form Ag+, the electrodes are

Specific conductivity of a solution

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

Strong oxidizing agents have

The amount of electricity that can deposit 108 g of silver from silver nitrate solution is

Metallic conduction is due to the

A smuggler could not carry gold by chemically depositing iron on the gold surface since

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

Metals which are above SHE in electrochemical series

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H2gas when treated with acids because

Which statement is incorrect for NICAD battery

In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to

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ECAT Class Chemistry Chapter 10 Important MCQ's

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2.5 faradays of electricity is passed through solution of CuSO_{4. The number of gram equivalents of copper deposited on the cathode would be}

In KO₂the oxidation state of oxygen is

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

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

During electrolysis of KNO₃, H₂is evolved

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

In passage of electricity through aqueous solution of AgNO₃silver dissolves at anode to form Ag⁺, the electrodes are

Coinage metals like Au, Pt, Ag and Cu are the least reactive metals and don't liberate H₂gas when treated with acids because