JEE Exam  >  JEE Tests  >  Chemistry for JEE Main & Advanced  >  Test: Nernst Equation, Conductance and Conductivity - JEE MCQ

Test: Nernst Equation, Conductance and Conductivity - JEE MCQ


Test Description

15 Questions MCQ Test Chemistry for JEE Main & Advanced - Test: Nernst Equation, Conductance and Conductivity

Test: Nernst Equation, Conductance and Conductivity for JEE 2024 is part of Chemistry for JEE Main & Advanced preparation. The Test: Nernst Equation, Conductance and Conductivity questions and answers have been prepared according to the JEE exam syllabus.The Test: Nernst Equation, Conductance and Conductivity MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Nernst Equation, Conductance and Conductivity below.
Solutions of Test: Nernst Equation, Conductance and Conductivity questions in English are available as part of our Chemistry for JEE Main & Advanced for JEE & Test: Nernst Equation, Conductance and Conductivity solutions in Hindi for Chemistry for JEE Main & Advanced course. Download more important topics, notes, lectures and mock test series for JEE Exam by signing up for free. Attempt Test: Nernst Equation, Conductance and Conductivity | 15 questions in 20 minutes | Mock test for JEE preparation | Free important questions MCQ to study Chemistry for JEE Main & Advanced for JEE Exam | Download free PDF with solutions
Test: Nernst Equation, Conductance and Conductivity - Question 1

 Cell reaction is spontaneous when

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 1

An electrochemical reaction takes place when the cations and the anions present in the electrolyte solution travel to the respective electrodes and either give up or take up electrons. As the ions travel, they carry a certain charge and in this process, electricity is produced.
But all these processes will only be possible or be spontaneous when the Gibbs Free energy of the medium is negative.

Test: Nernst Equation, Conductance and Conductivity - Question 2

Three cell A, B and C has equilibrium constant in the ratio 1:4 : 9 respectively. Arrange the following cells in the order of increasing Gibbs free energy.

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 2

The correct answer is option A

 

The cells will be arranged as such 9 : 4: 1.

Explanation:

  • The equilibrium constant that is used here is represented with k.

  • The smaller the value of k the higher will be the value of energy according to Gibbs.

  • So, 1 has the highest Gibbs free energy while 9 has the least.

  • This is the energy of a chemical reaction.

  • It is represented by G.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Nernst Equation, Conductance and Conductivity - Question 3

 Gibbs free energy change for a cell reaction is positive what does it indicates?

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 3

The correct answer is Option C.

Reactions with a negative ∆G release energy, which means that they can proceed without an energy input (are spontaneous). In contrast, reactions with a positive ∆G need an input of energy in order to take place (are non-spontaneous). Reactions with a positive ∆H and negative ∆S are non-spontaneous at all temperatures.

Test: Nernst Equation, Conductance and Conductivity - Question 4

The emf of a particular voltaic cell with the cell reaction  is  V. The maximum electrical work of this cell when of is consumed.

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 4




Hence

Test: Nernst Equation, Conductance and Conductivity - Question 5
A cell reaction would be spontaneous if the cell potential and are respectively :
Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 5
For spontaneous
Test: Nernst Equation, Conductance and Conductivity - Question 6

The Nernst equation E = E−RT/nF, ln Q indicates that the Q will be equal to equilibrium constant Kc when :

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 6

When

Test: Nernst Equation, Conductance and Conductivity - Question 7
Thermodynamic efficiency of a cell is given by:
Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 7
Thermodynamic efficiency of a cell is given by the ratio of Gibbs function change to enthalpy change in the overall cell reaction.
Test: Nernst Equation, Conductance and Conductivity - Question 8
In the electrolysis of water, one faraday of electrical energy would liberate
Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 8
According to the definition or the charge carried by of electrons when water is electrolysed

So, 4 Faraday of electricity liberate of Thus 1 Faraday of electricity liberate
of of
Test: Nernst Equation, Conductance and Conductivity - Question 9
In the electrolysis of solution, the mass of the cathode increased by . What occured at the copper anode?
Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 9
The amount. of copper deposited at cathode by reduction of ions is moles.
The same amount mole of must pass into solution from anode by oxidation
Test: Nernst Equation, Conductance and Conductivity - Question 10

of metal was deposited when a current of 2 ampere is passed through a metal ion solution for 100 seconds. What is the electrochemical equivalent (in gram coulomb -1) of the metal?

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 10


coulomb

Test: Nernst Equation, Conductance and Conductivity - Question 11

Electrode potentials (E) are given below :

Based on the above potentials, strongest oxidizing agent will be:

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 11

Higher the value of reduction potential stronger will be the oxidising hence based on the given values will be strongest oxidizing agent.

Test: Nernst Equation, Conductance and Conductivity - Question 12

is reduced by electrolysis at low potentials and high currents. If amperes of current is passed through molten for 6 hours, what mass of aluminium is produced? (Assume current efficiency. At. mass of )

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 12

∵ Q = i × t

Now since 96500 C liberates of
of

Test: Nernst Equation, Conductance and Conductivity - Question 13

Assertion (A) : A current of is passed into aqueous solution for . The weight of silver deposited is (At. wt. of
Reason (R): The mass of a substance deposited during the electrolysis of an electrolyte is inversely proportional to the quantity of electricity passing through the electrolyte.
The correct answer is :

Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 13





coulomb deposited wt. of
coulomb deposited wt. of
So, statement is true but is false. is false because mass of substance deposited is directly proportional to the quantity of electricity.

Test: Nernst Equation, Conductance and Conductivity - Question 14
The useful work done during the reaction Would be Given
, and
Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 14
For the cell reaction


or
Under standard conditions,

Useful work

Test: Nernst Equation, Conductance and Conductivity - Question 15
Molten is electrolysed using platinum electrodes. The reaction occurring at anode is
Detailed Solution for Test: Nernst Equation, Conductance and Conductivity - Question 15
In the electrolysis of , At anode,
352 videos|596 docs|309 tests
Information about Test: Nernst Equation, Conductance and Conductivity Page
In this test you can find the Exam questions for Test: Nernst Equation, Conductance and Conductivity solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Nernst Equation, Conductance and Conductivity, EduRev gives you an ample number of Online tests for practice

Top Courses for JEE

352 videos|596 docs|309 tests
Download as PDF

Top Courses for JEE