Electro Chemistry
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Electro Chemistry
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20 Questions

1. How many grams of cobalt metal will bedeposited when a solution of cobalt (II) chlorideis electrolyzed with a current of 10 amperes for109 minutes (1 Faraday = 96 - 500 C Atomicmass of Co = 59 u)
2. Specific conductance of a 0.1 NKCl solutionat 23ºC is 0.012 ohm -“1 cm-“1Resistance of cellcontaining the solution at same temperaturewas found to be 55 ohmThe cell constant is
3. Which of the following is an insulator?
4. The most convenient method to protect thebottom of ship made of iron is
5. Standard electrode potential for Sn 4+/ Sn2+couple is + 0.15 Vand that for the Cr 3+/ Cr coupleis -“ 0.74 VThese two couples in their standardstate are connected to make a cellThe cellpotential will be:154
6. Standard electrode potential of three metalsX - Yand Zare -“ 1.2 V - + 0.5 Vand -“ 3.0 V - respectivelyThe reducing power of thesemetals will be:
7. If 0.5 amp current is passed through acidifiedsilver nitrate solution for 100 minutesThe massof silver deposited on cathode - is (eq.wt.of silvernitrate = 108)
8. On passing a current of 1.0 ampere for 16 minand 5 sec through one litre solution of CuCl 2 - allcopper of the solution was deposited at cathode.The strength of CuCl 2 solution was (Molar massof Cu= 63.5 Faraday constant = 96 - 500 Cmol -“1)
9. 4.5 g of aluminium (atmass 27 amu) isdeposited at cathode from Al 3+ solution by acertain quantity of electric chargeThe volumeof hydrogen produced at STP from H + ions insolution by the same quantity of electric chargewill be
10. On heating one end of a piece of a metal - theother end becomes hot because of
11. Kohlrausch’s law states that at finite dilution - each ion makes definite contribution to equivalent conductance of an
12. The most durable metal plating on iron toprotect against corrosion is
13. On electrolysis of dilute sulphuric acid usingplatinum electrodes - the product obtained at theanode will be
14. The ionic conductance of Ba 2+ and Cl-“ arerespectively 127 and 76 ohm -“1 cm2 at infinitedilutionThe equivalent conductance (in ohm -“1cm2) of BaCl2 at infinite dilution will be:
15. 4.5 g of aluminium (atmass 27 amu) isdeposited at cathode from Al 3+ solution by acertain quantity of electric chargeThe volumeof hydrogen produced at STP from H + ions insolution by the same quantity of electric chargewill be
16. Ahydrogen gas electrode is made by dippingplatinum wire in a solution of HCl of pH= 10 andby passing hydrogen gas around the platinumwire at one atm pressureThe oxidationpotential of electrode would be?
17. Specific conductance of a 0.1 NKCl solutionat 23ºC is 0.012 ohm -“1 cm-“1Resistance of cellcontaining the solution at same temperaturewas found to be 55 ohmThe cell constant is
18. Without losing its concentration ZnCl 2solution cannot be kept in contact with
19. The most durable metal plating on iron toprotect against corrosion is
20. How many grams of cobalt metal will bedeposited when a solution of cobalt (II) chlorideis electrolyzed with a current of 10 amperes for109 minutes (1 Faraday = 96 - 500 C Atomicmass of Co = 59 u)

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