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JEE Exam  >  JEE Tests  >  Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - JEE MCQ

Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - JEE MCQ


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15 Questions MCQ Test - Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law

Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law for JEE 2024 is part of JEE preparation. The Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law questions and answers have been prepared according to the JEE exam syllabus.The Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law below.
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Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 1
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A device that converts energy of combustion of fuels like hydrogen and methane, directly into electrical energy is known as:

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A device that converts energy of combustion of fuels, directly into electrical energy is known as fuel cell.
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Schematic diagram of an electrolytic cell is

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In electrolytic cell,
Cation moves to cathode and anion moves to anode.

Electrons move anode to cathode.

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Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 3
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The metal that can not be obtained by electrolysis of an aqueous solution of its salt is

[JEE Main 2014]

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In electro chemical series (ECS),

thus, Ca2+ ion is not reduced to C a instead, H2O is reduce d to H2. 

Ag, Cu and Cr are below H in ECS (E°reduction > 0), thus they are reduced to metals on electrolysis.

Note In ECS, Ca, H, Cr, Cu elements lying above H are better reducing agents thus are easily oxidised.

Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 4
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A concentration cell is a galvanic cell in which
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In concentration cell the spontaneous process is physical in nature involving transfer of matter from higher concentration to lower concentration in indirect manner
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How long a current of 3 amperes has to be passed through a solution of to coat a metal surface of and thick layer. Density of is
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Volume Area thickness
Mass Volume density
Mass of to be deposited

Amount deposited
seconds
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In which of the following cells, the space between cathode and anode is filled by a moist mixture of ammonium choride and zinc chloride?
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Leclanche cell consist of a zinc container which acts as anode. The cathode is a carbon (graphite) rod surrounded by a mixture of powdered manganese dioxide and carbon.
The space between cathode and anode is filled by a moist mixture of ammonium chloride and zinc chloride.
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Which colourless gas evolves, when reacts with zinc in a dry cell battery
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Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 8
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The e.m.f. of a Daniell cell at 298 K is 
When the concentration of ZnSO4 is 1.0M and that of CuSO4 is 0.01M, the e.m.f. changed to E2. What is the relationship between E1 and E2 ?
Detailed Solution for Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 8

Cell reaction is,

Greater the factor , less is the EMF Hence

Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 9
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of pure silver was converted into silver nitrate and its solution was taken in a beaker. It was electrolysed using platinum cathode and silver anode. Faraday of electricity was passed using volt above the decomposition potential of silver. The silver content of the beaker after the above shall be
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mole of electrons
left
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The acts as sacrificial or cathodic protection to prevent rusting of iron because :
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of of
Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 11
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Two half cells have reduction potentials and respectively. A galvanic cell is made from these two half cells. Which of the following statements is correct?
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According to the electrochemical series, the electrode with high reduction potential will act as a cathode, and the electrode with more negative reduction potential acts as the anode.
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Aqueous solution of which of the following compounds is the best conductor of electric current?
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completely dissociates to give and ions, hence act as very good electrolyte. While others are non- electrolytes.
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A hydrogen gas electrode is made by dipping platinum wire in a solution of of and by passing hydrogen gas around the platinum wire at one atm pressure. The oxidation potential of electrode would be ?
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Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 14
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Mark the false statement?
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Correct Nernst equation is

Test: Electrolysis & Faraday's Laws, Kohlrausch’s Law - Question 15
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In the silver plating of copper, is used instead of . The reason is
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In the silver plating of copper, is used instead of . Copper being more electropositive readily precipitate silver from their salt solution

whereas in solution a complex anion is formed and hence are less available in the solution and therefore copper cannot displace Ag from its complex ion.
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