Chemistry questions
29404 published questions with worked solutions.
- The standard reduction potential for Pb^ 2+ | Pb and Zn^ 2+ | Zn are -0.126 V and -0.763 V respectively. The e.m.f. of the cell...
- The e.m.f. of the cell depends upon
- If the standard oxidation potential, E^ for the half cell reaction are Zn → Zn^ 2+ + 2e^- ; E^ = +0.76 V and Fe → Fe^ 2+ + 2e^- ;...
- The emf for the cell Ni | Ni^ 2+ (1.0 M) || Au^ 3+ (1.0 M) | Au (E^ for Ni^ 2+ / Ni = -0.25 V; E^ for Au^ 3+ | Au = 1.50 V) is
- The cell potential for the cell Ni | Ni^ 2+ (1 M) || Cu^ 2+ (1 M) | Cu is 0.59 V and E(Cu^ 2+ | Cu) = +0.34 V. What is the...
- When zinc electrode and calomel electrode are coupled to form a cell, the cell emf is given as
- The e.m.f. of a cell involving the cell reaction H_2 + 2Ag^+ → 2H^+ + 2Ag is 0.80 V. The standard reduction potential of Ag^+ |...
- The cell potential of the galvanic cell Zn | Zn^ ++ | Ag^+ | Ag ; E^ (Zn^ ++ | Zn) = -0.76 V, E^ (Ag^+ | Ag) = +0.80 V
- The half cell reaction of the cell used in hearing aids are Zn → Zn^ 2+ + 2e^- (E^ = +0.76 V) Ag_2O + H_2O + 2e^- → 2Ag + 2OH^-...
- To an aqueous solution containing I^- and Br^- ions, I_2 and Br_2 are added. The products of the reaction would be
- The standard reduction potentials at 25°C of Li^+ | Li, Ba^ 2+ | Ba, Na^+ | Na and Mg^ 2+ | Mg are -3.05, -2.90, -2.70 and -2.37...
- Which of the following metal cannot liberate hydrogen from the acid?
- E^ values of Mg/Mg^ +2 is +2.37 V, of Zn/Zn^ +2 is +0.76 V and that of Fe/Fe^ +2 is +0.44 V, which of the following statements is...
- A solution containing one mole per litre each of Cu(NO_3)_2, AgNO_3, Hg_2(NO_3)_2 and Mg(NO_3)_2, is electrolyzed using inert...
- The SRP values of three elements A, B and C are +2.37 V, -1.85 V and -1.36 V respectively. So the order of their reducing power...
- Will tin displace lead from an aqueous solution of lead bromide?
- More electropositive elements have more
- On the electrolysis for aqueous solution of sodium sulphate, on cathode we get
- Which metal does not give the following reaction? M + water (steam) → Oxide + H_2↑Not in JEE Main or NEET syllabus
- Can spontaneous reactions occur between Zn^ 2+ and Au atoms? (E^ _ ox Values for zinc and gold are +0.76 V and -1.42 V resp.)