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JEE-Main - Grade 12 - Chemistry - Electrochemistry - Introduction and Snapshot of Electrochemistry - Study ref# 857

Introduction: Electrochemistry is the study of production of electricity from energy released during spontaneous chemical reactions and the use of electrical energy to bring about non-spontaneous chemical transformations. The subject i... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Introduction and Snapshot of Electrochemistry - Study ref# 858

Following sections must be covered to understand the Electrochemistry: 1. Electrochemical Cells 2. Galvanic Cells 3. Nernst Equation 4. Conductance of Electrolytic Solutions 5. Electrolytic Cells and Electrolysis 6. Batteries ... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Target Setup for Electrochemistry - Study ref# 859

Student requires to achieve the following milestones to get better grip over Electrochemistry. The milestones / targets are as follows: Starting Point: Days 0Test TypeAppear on TestTarget TestsScorePractice Test000%Chapter Test00... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9726

Which cell will measure standard electrode potential r copper electrode? (a) (b) (c) (d) Answer: (d)Standard electrode potential of copper electrode can be calculated by constructing a concentration c... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9727

Which of the following statement s correct? (a) Ecell and ∆rG of cell reaction both are extensive properties (b) Ecell and ∆rG of cell reaction both are intensive properties (c) Ecell in an intensive pr... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9728

Which of the following statement is not correct about an inert electrode in a cell? (a) It does not participate in the cell reaction (b) It provides surface either for oxidation or for reduction reaction (c) It ... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9729

An electrochemical cell can behave like an electrolytic cell when……….. (a) Ecell =0 (b) Ecell>Eext (c) Eext>Ecell (d) Ecell=Eext Answer: If an external opposite potential is applied on th... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9730

Using the data given below find out the strongest reduction agent. (a) Cl (b) Cr (c) Cr3+ (d) Mn2+ Answer: (b)Here out of given four options standard reduction potential or chromium has highest ne... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9731

The quantity of charge required to obtain one mole of aluminium from Al2O3 is ………. . (a) 1F (b) 6F (c) 3F (d) 2F Answer: (c)The quantity of charge required to obtain one mole of aluminium ... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9732

The positive value of the standard electrode potential of Cu2+/Cu indicates that ………… (a) this redox couple is a stronger reducing agent than the H+/H2 couple (b) this redox couple is a stronger oxidizi... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9733

For some ½ cell reactions are given below. On the basis of these mark the correct answer. (a) =0.00V (b) =1.23V (c) =1.96V

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9734

Conductivity of an electrolytic solution depends on (a) Nature of electrolyte (b) Concentration of electrolyte (c) Power of AC source (d) Distance between the electrodes Answer: (a, b) conductivity of ... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9735

Conductivity, is equal to ……. (a) (b) (c) (d) Answer: (a, b) as we know that, conductance is reciprocal and conductivity is the conductance of 1cm3 of substance. Also conductivity is reciproc... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9736

For the given cell, (a) Mg is cathode (b) Cu is cathode (c) The cell reaction is (d) Cu is the oxidizing agent Answer: (b, c) left side of cell reaction represents oxidation ½ cell i.e. oxidation of Mg ... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9737

Can absolute electrode potential of an electrode be measured? Answer: No, only the difference in potential between two electrodes can be measured. This is due to the reason that oxidation or reduction cannot occur alone. So, when we measu... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9738

Under what condition is E cell =0 or ∆r G=0? Answer: At the stage of chemical equilibrium in the cell E cell =0 ∆r G= −n F =−n×F×0=0... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9739

What does the negative sign in the expression mean? Answer: Greater the negative reactivity of standard reduction potential of meal greater is its reactivity. It means that Zn is more reactive than hydrogen. When zinc electrode will be co... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9740

Depict the galvanic cell in which the cell reaction is Answer: In a galvanic cell, oxidation half reaction is written on left hand side and reduction half reaction is on right hand side. Salt bridge is represented by parallel lines.... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9741

Consider the following diagram in which an electrochemical cell is coupled to an electrolytic cell. What will be the polarity of electrodes ‘A’ and ‘b’ in the electrolytic cell? Answer: The cell drawn above represents electr... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9742

Why is alternating current used for measuring resistance oof an electrolytic solution? Answer: Alternating current is used in electrolysis so that concentration of ions in the solution remains constant and extract value of resistance is m... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9743

Solutions of two electrolytes A and B are diluted the of ‘b’ increases 1.5 times while that of a increases 25 times. Which of the two is a electrolyte? Justify your answer. Answer: Strong ... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9744

When acidulated water (dil. H2SO4 solution) is electrolyzed, with pH of the solution be affected? Justify your answer. Answer: Since pH of solution depends upon concentration of H+ presence in solutions. pH of the solutions will not be ef... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9745

What advantage do the fuel cells have over primary and secondary batteries? Answer: Primary batteries contain a limited amount of reactants and are discharged when the reactants have been consumed. Secondary batteries can be recharged but it... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9746

Assertion (A) Cu is less reactive than hydrogen. Reason (R) is negative. (a) Both assertion and reason are true is the correct explanation of assertion. (b) Both assertion and reason are true is not the correct explanat... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9747

Assertion (A) Ecell should have a positive value for the cell to function. Reason (R) (a) Both assertion and reason are true is the correct explanation of assertion. (b) Both assertion and reason are true is not the cor... read more

JEE-Main - Grade 12 - Chemistry - Electrochemistry - Study ref# 9748

Assertion (A) for weak electrolytes shows a sharp increase when the electrolytic solution is diluted. Reason (R) for weak electrolytes degree of dissociation increases with dilution of solution. (a) Both assertion and reason ... read more

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