Chemistry questions
29404 published questions with worked solutions.
- How many Coulomb of electricity are required for the oxidation of one mole of water to dioxygen?
- The equivalent conductivity of a solution containing 2.54 g of CuSO_4 per L is 91.0 ^ -1 ,cm^2 ,eq^ -1 . Its conductivity would be
- Which of the statements about solutions of electrolytes is not correct?
- Solubility of a sparingly soluble salt S., specific conductance , and the equivalent conductance _0 are related as
- Select the correct statement for _m = E^ _m - A C^ 1/2 .
- How many coulombs are required in order to reduce 12.3 g of nitrobenzene to aniline?
- Consider the following statements, I. Q = It II. Charge is required for reduction or reduction depends on the stoichiometry of...
- Which of the following reaction is preferred at anodes during the electrolysis of H_2SO_4 at higher concentration?
- Aluminium is produced by the electrolysis of ...(i)... in the presence of ... (ii).... Fill in the blanks (i) & (ii) with...Not in JEE Main or NEET syllabus
- Which of the following statement(s) is/are false for electrolytic cell?
- At 298 K, the standard reduction potentials are 1.51 V for MnO_4^-|Mn^ 2+ , 1.36 V for Cl_2|Cl^- , 1.07 V for Br_2|Br^- and 0.54...
- The two half-cell reaction of an electrochemical cell is given as Ag^+ + e^- Ag ; E^ _ Ag^+/Ag = -0.3995 V Fe^ 2+ Fe^ 3+ + e^- ;...
- For Cr_2O_7^ 2- + 14H^+ + 6e^- 2Cr^ 3+ + 7H_2O ; E^ = 1.33 V. At 298 K, [ Cr_2O_7^ 2- ] = 4.5 millimole, [ Cr^ 3+ ] = 15...
- If the E^ _ cell for a given reaction has a negative value, then which of the following gives the correct relationships for the...
- The electrode potentials for Cu^ 2+ (aq) + e^- Cu^+(aq) and Cu^+(aq) + e^- Cu(s) are +0.15 V and +0.50 V respectively. The value...
- Standard electrode potential of three metals X, Y and Z are −1.2 V, +0.5 V and −3.0 V, respectively. The reducing power of these...
- Given the following reactions involving, A, B, C and D C + B^+ C^+ + B A^- + D No reaction C^+ + A No reaction D + B^+ D^+ + B...
- The standard emf of a galvanic cell involving 2 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for...
- If the half-cell reactions are given as : (i) Fe^ 2+ (aq) + 2e^- Fe(s) ; E^ = -0.44 V (ii) 2H^+(aq) + 12 O_2(g) + 2e^- H_2O(l) ;...
- The standard emf of a cell involving one electron change is found to be 0.591 V at 25℃. The equilibrium constant of the reaction...