Electrochemistry questions
1808 published questions with worked solutions.
- The limiting molar conductivities ^ _m for NaBr, KBr and KCl are 128, 152 and 150 S ,cm^2 ,mol^ -1 respectively. The ^ _m for...
- How many of the following species conduct electricity? Fused NaCl, CO_2 (solid), aqueous HCl solution, aqueous urea solution,...
- Standard reduction potentials of some species P, Q, R, T, U, W are -2.90 V, +0.34 V, +1.20 V, -0.76 V, -1.35 V, +0.1 V...
- If the limiting molar conductances of CH_3COONa , HCl and NaCl are 91.0, 426.2 and 126.5 S ,cm^2 ,mol^ -1 respectively at 25^ ,...
- Two platinum electrodes fitted in a conductance cell are 2.5 cm apart, while the area of cross-section of each electrode is 0.75...
- How many faradays of electricity are required to oxidise 1 mol of water to dioxygen?
- The standard oxidation potentials of iron and silver are +0.41 V and -0.80 V respectively (i.e. E^ _ red ( Fe^ 2+ /Fe )=-0.41 V,...
- 4 faradays of electricity is passed through a solution of CuSO_4 . The mass of copper deposited at the cathode is ________ g.
- The e.m.f. of the Daniel cell is ________ V.
- How many of the following metals can be obtained by electrolysis of aqueous solutions of their salts? Ag, Ca, Cu, Mg, Na, Al
- When 6 amperes of current is passed for 965 seconds through an aqueous solution of NaCl, the amount of chlorine evolved is...
- The equilibrium constant for a voltaic cell reaction is 1.0 10^ 10 . If the cell reaction involves a change of one electron, then...
- ^ _m for NaCl, HCl and NaA are 126.4, 425.9 and 100.5 S ,cm^2 ,mol^ -1 respectively. For a 0.001 M solution of the acid HA, the...
- In the cell Pt (s)| H_2 (g,1 bar )| HCl (aq)| AgCl (s)| Ag (s)| Pt (s), the cell potential is 0.92 V when a 10^ -6 molal HCl...
- Of the following, which cannot be obtained by electrolysis of the aqueous solution of their salts?
- The process of Zinc-plating on iron sheet is known as [UP SEE 2006]
- If reduction of Cu^ 2+ by Al is possible then E^ _ cell will be …… volt. 3Cu^ 2+ +2Al 2Al^ 3+ +3Cu
- In the electrolysis of AgNO_3 solution, 97.2 g of Ag is deposited on passing current for 9650 s. What is the value of current in...
- E^ _ red values are: Ag^++e^- Ag +0.80 V Zn^ 2+ +2e^- Zn -0.76 V Fe^ 2+ +2e^- Fe -0.44 V Cu^ 2+ +2e^- Cu +0.34 V Hg^ 2+ +2e^- Hg...
- Which is not essential for rusting?
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