Electrochemistry Questions
In which of the following half-reactions, reduction is taking place?
Match List-I with List-II: List-I (Property) List-II (S.I Unit) (A) Conductance (B) Conductivity (C) Molar conductivity (D) Resistivity
Which one of the following has the highest reduction potential?
In Daniell cell, if the value of applied Eext (opposite potential) > 1.10 V, then which of the following statements is correct?
Given below are two statements: Statement I: Kohlrausch’s law states that the limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte. Statement II: Dry ce
The degree of dissociation (α) for 10–3 M acetic acid having molar conductivity 48.15 S cm2 mol–1 will be; (Given: Λ°m for acetic acid is 390.5 S cm2 mol–1)
Dissociation constant (Ka) for acetic acid is given by:
Match the List-I with List-II. List-I (Physical quantity) List-II (Formula) (A) G (B) G* (C) Λm (D) α
Consider the following E°red values. Zn2+ + 2e– → Zn(s) ; E° = –0.76V Mg2+ + 2e– → Mg(s) ; E° = –2.36V Ca2+ + 2e– → Ca(s) ; E° = –2.87V Now, choose the correct statement.
The decreasing order of electrical conductivity of the following aqueous solution is I. 0.1 M HCl II. pure water III. 0.1 M CH3COOH
The gases obtained at cathode and anode during electrolysis of dil.H2SO4 respectively are:
Standard electrode potential of three metals A, B and C are –1.2 V, +0.2 V and –3.9 V respectively. The reducing power of these metals will be:
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): Assertion (A): An electrolyte ‘A’ having specific conductance 2 × 10–6 ohm–1 cm–1 offers more resistance than an electrolyte ‘B’ having specific
22 ohm and 0.022 ohm–1 cm–1 is the resistance and specific conductance respectively of a seminormal solution of sodium chloride. The value of the cell constant will be:
The product obtained at cathode during the electrolysis of aqueous solution of CuCl2 is:
A standard hydrogen electrode has zero electrode potential because:
1 gram equivalent substance is deposited when the electric current passed is equal to;
When the salt bridge is removed from cell, the cell voltage;
Which of the following is the weakest reducing agent?
For a spontaneous cell reaction, the correct conditions are:
When a lead storage battery is charged, solid lead sulphate is converted into:
The molar conductance’s of NaCl, HCl and CH3COONa at infinite dilution are 126.45, 426.16 and 91 ohm–1 cm2 mol–1 respectively. The molar conductance of CH3COOH at infinite dilution (Λ°m) is;
During the electrolysis of molten sodium chloride, the time required to produce 35.5 g of chlorine gas using a current of 1930 amperes is;
Mark the correct choice of electrolytes represented in the graph:
Standard electrode potential for Ni2+/Ni couple is –0.23V and that for the Zn2+/Zn couple is –0.76V. These two couples in their standard state are connected to make a cell. The cell potential will be:
The number of Faraday required to reduce 5 moles of Cu2+ to Cu is: