Chemistry questions
29404 published questions with worked solutions.
- Which of the following statements is true for the electrochemical Daniell cell?
- Standard free energies of formation (in kJ/mol) at 298 K are -237.2, -394.4 and -8.2 for H_2O(l) , CO_2(g) and pentane (g),...
- The cell reaction of the galvanic cell Cu(s)|Cu^ 2+ (aq) |Hg^ 2+ (aq)|Hg(l) is
- Which of the following reactions cannot be a base for electrochemical cell?
- The electrochemical cell stops working after sometime because
- In a galvanic cell, the electrons flow from
- In the electrolytic cell, flow of electrons is from
- Consider the following reactions at 1100^ C, (i) 2C + O_2 2CO, G^ = -460 kJ mol^ -1 (ii) 2Zn + O_2 2ZnO, G^ = -360 kJ mol^ -1...Not in JEE Main or NEET syllabus
- E^ _ cell for some half-cell reactions are given below. On the basis of these mark the correct answer. I. H^+(aq) + e^- 1 2...
- The standard electrode potentials for the reactions, Ag^+(aq) + e^- Ag(s) Sn^ 2+ (aq) + 2e^- Sn(s) at 25^ C are 0.80 V and -0.14...
- The equation representing the process by which standard reduction potential of zinc can be defined is
- The emf of the cell, Ni|Ni^ 2+ (1.0M)||Ag^+(1.0M)|Ag (E^ for Ni^ 2+ /Ni = -0.25 V, E^ for Ag^+/Ag = 0.80 V) is given by
- How many electrons are involved in the reaction, when 0.40 F of electricity is passed through an electrolytic solution? [MHTCET...
- What will be the concentration of NaCl solution, if the molar conductivity and conductivity of NaCl solution is 124.3 ^ -1 cm^2...
- A solution of CuSO_4 is electrolysed using a current of 1.5 A for 10 minutes. What mass of Cu is deposited at cathode? [Atomic...
- If resistivity of 0.8M KCl solution is 2.5 10^ -3 ,cm. Calculate molar conductivity of solution? [MHTCET 2020]
- How many Faradays of electricity is required to produce 4.8 g of Mg at cathode in the electrolysis of molten MgCl_2? (Molar mass...
- Number of electrons involved in the reaction, when 1 Faraday of electricity is passed through an electrolytic solution is [MHTCET...
- The conductivity of an electrolytic solution decreases on dilution due to [MHTCET 2019]
- Two electrolytic cells are connected in series containing CuSO_4 solution and molten AlCl_3. If in electrolysis 0.4 moles of 'Cu'...