Chemistry questions
29404 published questions with worked solutions.
- E^ values of Mg^ 2+ /Mg is −2.37 V, of Zn^ 2+ /Zn is −0.76 V and Fe^ 2+ /Fe is −0.44 V. Which of the following statement is...
- The potential of the following cell is 0.34 V at 25℃. Calculate the standard reduction potential of the copper half-cell....
- An electrochemical cell can behave like an electrolytic cell when
- Which cell will measure standard electrode potential of copper electrode?
- The standard electrode potentials for the reactions, Ag^+(aq) + e^- Ag(s) Sn^ 2+ (aq) + 2e^- Sn(s) at 25℃ are 0.80 V and −0.14 V,...
- E^ _ (Ni^ 2+ /Ni) = -0.25 V, E^ _ (Au^ 3+ /Au) = 1.50 V. The emf of the voltaic cell, Ni/Ni^ 2+ (1.0 M) ,|| , Au^ 3+ (1.0 M) ,|...
- The cell reaction of a cell is Mg(s) + Cu^ 2+ (aq) Cu(s) + Mg^ 2+ (aq) If the standard reduction potential of Mg and Cu are −2.37...
- Calculate the emf of the following cell at 25℃ Pt(H_2)|HCl|(H_2)Pt
- Select the false statement for Daniell cell.
- Consider the reaction, 12 H_2(g) + AgCl(s) H^+(aq) + Cl^-(aq) + Ag(s) In which of the following galvanic cell, the above reaction...
- The standard reduction potential for Fe^ 2+ /Fe and Sn^ 2+ /Sn electrodes are −0.44 and −0.14 V, respectively. For the cell...
- Which among the following cell has longer life and more expensive to manufacture?
- Galvanic cell is a device in which
- The process of zinc-plating on iron sheet is known as
- Corrosion of iron is essentially an electrochemical phenomenon where the cell reactions are
- On the basis of electrochemical theory of aqueous corrosion, the reaction occurring at the cathode is
- Impure copper containing Fe, Au, Ag as impurities is electrolytically refined. A current of 140 A for 482.5 s decreased the mass...
- The weight of silver (atomic weight = 108) displaced by a quantity of electricity which displaces 5600 mL of O_2 at STP will be
- 20 mL solution of 0.1 M ferrous sulphate was completely oxidised using a suitable oxidising agent. What is the number of...
- The resistance of 1 N solution of acetic acid is 250 , when measured in a cell having a cell constant of 1.15 cm^ -1 . The...