Write the Nernst equation for the cell reaction in the Daniel cell. (iii) Assertion is true but the reason is false. Match the terms given in Column I with the units given in Column II. When will the maximum work be obtained from a galvanic cell. (iii) In dilute sulphuric acid solution, water will be oxidised at anode. Choose the correct answer out of the following choices. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Pressure increases B. Dilution decreases C. Dilution increases D. None. How will the E. What advantage do the fuel cells have over primary and secondary batteries? What will happen during the electrolysis of aqueous solution of CuSO. (e) converts energy of combustion into electrical energy. (iv) Both assertion and reason are false. Note : Match the items of Column I and Column II in the following questions. Hence, Where ‘u’ are ionic mobilities at infinite dilution. Which cell will measure standard electrode potential of copper electrode? Applications of Kohlaransch’s Law 1) To calculate Λ° m of weak electrolytes. Using the data given below find out the strongest reducing agent. 3. Molar conductivity of ionic solution depends on ___________. Required fields are marked *. Conductivity of an electrolytic solution depends on ____________. (ii) changes with change of concentration of electrolyte. What is the relationship between Gibbs free energy of the cell reaction in a galvanic cell and the emf of the cell? Electrochemistry deals with the study of electrochemical processes and their applications which involve: i) the conversion of electrical energy into chemical energy and . Consider the following diagram in which an electrochemical cell is coupled to an electrolytic cell. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. It is defined as the product of the initial concentration of the reactant and the degree of dissociation; Now suppose you have a reaction like this $$\ce{A->B + C}$$ The initial state of A is always the concentration of A (should be given in the question) while initial moles of … 5. Leave a Reply Cancel reply. (ii) Both assertion and reason are true and the reason is not the correct explanation of assertion. The Λ. Here you can get Class 12 Important Questions Chemistry based on NCERT Text book for Class XII. (i) Both assertion and reason are true and the reason is the correct explanation of assertion. How will the pH of brine (aq. Why? 2. Use the data given in Q.8 and find out which of the following is the strongest oxidising agent. Aqueous copper sulphate solution and aqueous silver nitrate solution are electrolysed by 1 ampere current for 10 minutes in separate electrolytic cells. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. In the electrolysis of aqueous sodium chloride solution which of the half cell reaction will occur at anode? In the calculation of solubility of a sparingly soluble salt. Go Back to Chemistry Home Page Physics Maths Biology. In the calculation of the degree of dissociation. What will be the polarity of electrodes ‘A’ and ‘B’ in the electrolytic cell? Solutions of two electrolytes ‘A’ and ‘B’ are diluted. (iii) changes with temperature of electrolyte. Your email address will not be published. Which reference electrode is used to measure the electrode potential of other electrodes? (ii) It provides surface either for oxidation or for reduction reaction. Which of the statements about solutions of electrolytes is not correct? (iv) In dilute sulphuric acid solution, SO. Electrochemistry is the study … IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Question from very important topics are covered by NCERT Exemplar Class 12. … The difference between the electrode potentials of two electrodes when no current is drawn through the cell is called ___________. Here we have provided NCERT Exemplar Problems Solutions along with NCERT Exemplar Problems Class 12. (i) It does not participate in the cell reaction. You also get idea about the type of questions and method to answer in your class 12th examination. Unlike dry cell, the mercury cell has a constant cell potential throughout its useful life. Chemistry Class 12 Important Questions are very helpful to score high marks in board exams. Reason : In the cell reaction, ions are not involved in solution. Match the items of Column I and Column II. Electrode potential for Mg electrode varies according to the equation. Use the data given in Q.8 and find out the most stable ion in its reduced form. Plus Two Chemistry Notes Chapter 3 Electrochemistry is part of Plus Two Chemistry ... Y+ and V. are number of cations and anions from a formula unit of the electrolyte. (i) Conductivity of solution depends upon size of ions. Explain your answer. (iii) Conductivity does not depend upon solvation of ions present in solution. Use the data of Q.8 and find out the most stable oxidised species. Conductivity κ , is equal to ____________. Tutorial sheet-II Electrochemistry (Degree of Dissociation) 1. Will the mass of copper and silver deposited on the cathode be same or different? Which of the following statement is correct? (b) does not involve any ion in solution and is used in hearing aids. An electrochemical cell can behave like an electrolytic cell when ____________. Reason : For weak electrolytes degree of dissociation increases with dilution of solution. (iii) concentration of electrolytes in solution. Which of the following statement is not correct about an inert electrode in a cell? Depict the galvanic cell in which the cell reaction is Cu + 2Ag, Value of standard electrode potential for the oxidation of Cl. (ii) In concentrated sulphuric acid solution, water will be oxidised at anode. It is possible to carry out a non spontaneous chemical reaction by applying sufficient electrical voltage in an electrochemical cell. Chemistry Important Questions Class 12 are given below. Get up to 100% scholarship and cash awards. The degree of dissociation of week electrolyte increases as_____? The degree of dissociation of week electrolyte increases as________________? It can be inferred that a higher value of K a resemble stronger acid. (adsbygoogle = window.adsbygoogle || []).push({}); PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. A. Electrochemistry Electrochemistry. A. The cell constant of a conductivity cell _____________. and answer the questions (i) to (vi) given below. Pressure increases B. Dilution decreases C. Dilution increases D. None. Note : In the following questions a statement of assertion followed by a statement of reason is given. While charging the lead storage battery ______________. Your email address will not be published. Mcq Added by: Bilal. Consider Fig. The quantity of charge required to obtain one mole of aluminium from Al. Your email address will not be published. What will be the degree of ionization of N/1000 acetic acid solution if its equivalent conductance is 50mhos and the value of equivalent conductance at infinite dilution is 350mhos. Thus a lower value of pK a which -logK a will resemble a stronger acid. Using the data given in Q.8 find out in which option the order of reducing power is correct. For the strong electrolyte, the molar conductivity increases sharply with increasing concentration. Here we have covered Important Questions on Electrochemistry for Class 12 Chemistry subject. NaCl solution) be affected when it is electrolysed? ANTHE helps students to know their potential at All India Level and prepare under the expert guidance of Aakash. Due to an increase in dilution degree of dissociation increases and which results in an increase in the molar conductivity. NCERT Exemplar Class 12 Chemistry is very important resource for students preparing for XII Board Examination.

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