Chemistry questions
29404 published questions with worked solutions.
- How many Faradays are required to liberate one mole of O_2 gas at N. T. P. during electrolysis of dilute NaOH solution?
- The oxidation potential of Zn, Mg, Ni and Cu are 0.76 V, 2.37 V, 0.25 V and -0.34 V respectively. What will not be liberation H_2...
- The strongest oxidizing agent among the species In^ 3+ (E^0=-1.34V), Au^ 3+ (E^0=1.4V), Hg^ 2+ (E^0=0.86V), Cr^ 3+ (E^0=-0.74V) is
- The number of Faradays required to produce 0.5 mol of free metal from Al^ 3+ is
- The same quantity of electricity is passed through two cells one containing AlCl_3 solution and the other containing ZnCl_2...
- In the Lead storage battery during discharging
- In the electrolysis of molten Al_2O_3 with inert electrodes
- The following reaction occurs in a galvanic cell 2Cu^+ Cu^ 2+ + Cu If E^0_ Cu^+,Cu^ 2+ = 0.16V and E^0_ Cu^+|Cu = 0.52V, the...
- Consider the following half reactions and choose the correct alternative 1. Cl_2(g) + 2e^- 2Cl^-(aq) E^0 = 1.36V 2. Br_2(l) +...
- The emf of cell is 1.3 volt. The positive electrode has potential of 0.5 volt. The potential of negative electrode is
- The standard reduction potential of Fe^ 2+ /Fe and Sn^ 2+ /Sn are -0.44 V and -0.14 V respectively. What will be the e.m.f. of...
- The amount of electricity required to deposit one gram atom of Mg from its molten salt is
- 96500 coulomb (1F) electricity is passed through CuSO_4 solution, copper precipitated is
- A current when passed liberates 0.504 gm of H_2 in 2 hour. How many grams of Cu can be liberated by the same current flowing for...
- In a cell containing zinc electrode and hydrogen electrode, the zinc electrode acts as
- Consider the cell Pt | Cl_2(g) | HCl(aq) || HBr(aq) | Br_2(l) | Pt. If concentration of HCl is increased, the cell potential will
- In Nernst equation the constant 0.0591 at 298K represents the value of
- The electrode potential of a silver electrode dipped in 0.1 M AgNO_3 solution at 298K is (E^ red of Ag = 0.80 volt)
- The standard reduction potentials of metals A and B are x and y respectively. If x > y. The standard emf of the cell containing...
- If a salt bridge is removed between the two half cells in an experiment, the voltage