1. Aluminium oxide may be electrolysed at ${1000}^{0}C$ to give Al metal (at mass = 27 amu, 1F=96.500 C).To prepare 5.12 kg of Al would require

2. The standard e.m.f of a galvanic cell involving cell reaction with n = 2 is found to be 0.295 V at ${25}^{0}C\mathrm{.}$ The equilibrium constant of reaction would be

3. The standard emf of Daniel cell is 1.10 volts.The maximum electrical work obtained from the cell is

4. The electrode potential of hydrogen electrode at pH 10 is

5. In a $H_2-O_2$ fuel cell, 6.72 L of hydrogen at NTP reacts in 15 minutes, the average current produced in ampere is

6. Certain quality of current liberated 0.507g of hydrogen in 2 hr.The number of grams of copper that can be liberated by same under similar conditions will be approximately

7. When ${\mathrm{KMnO}}_4$acts as an oxidising agent and ultimately forms ${\mathrm{Mn}{O}_4}^{2-},{\mathrm{MnO}}_2,$${M{n}_{2}O}_3$ and ${\mathrm{Mn}}^{2+}$then the number of electrons transferred in each case respectively is

8. The electrolysis of acqueous solution of ${\mathrm{CuBr}}_2$ using platinum electrode would lead to the evolving of

9. The depolarizer used in dry cell batteries is

10. Zn rod is placed in 100 mL of 1 M CuS$O_4$ solution so that molarity of ${\mathrm{Cu}}^{2+}$change to 0.7 M.The molarity of ${S{O}_4}^{2-}$ ions at this stage will be

11. In which of the following compound Cl exhibits more than one oxidation states?

12. In which of the following compound, valency of carbon is 4 but its oxidation number is zero

13. Magnesium reacts with acids producing hydrogen and corresponding magnesium salts. In such reaction magnesium undergoes

14. Which of the following is the most powerful oxidising agent?

15. Molar conductivity of a solution is 1.26 $\times$${10}^2$ ${\mathrm{\Omega }}^{-1}{\mathrm{Cm}}^2$ ${\mathrm{mol}}^{-1}$ . Its molarity is 0.01. Its specific conductivity will be

16. At infinite dilution, the aqueous solution of BaC$l_2$ , molar conductivity of ${\mathrm{Ba}}^{2+}$ ans ${\mathrm{Cl}}^{-}$ ions are = 127 . 32 S${\mathrm{cm}}^2/\mathrm{mol}$ and 76.34 S${\mathrm{cm}}^2/\mathrm{mol}$ respectively.What is ${\wedge }_m^{\infty }$ for ${\mathrm{BaCl}}_2$ at same dilution?

17. The specific conductance of a 0.1 N KCl solution at ${23}^{0}C$ is 0.012 ${\mathrm{ohm}}^{-1}{\mathrm{cm}}^{-1}\mathrm{.}$ The resistance of cell containing the solution at the same temperature was found to be 55 ohm. The cell constant will be

18. At STP 1.12 litre of $H_2$ is obtained on flowing a current for 965 seconds in a solution. The value of current is

19. Reaction takes place at anode is

20. Electrode potentials${(E^0}_{\mathrm{red}})$ of 4 elements A,B,C,D are - 1.36, -0.32, 0, -1.26 V respectively. The decreasing reactivity order of these elements is

21. The standard reduction potential of ${\mathrm{Li}}^{+}/\mathrm{Li},$
${\mathrm{Ba}}^{2+}/\mathrm{Ba},{\mathrm{Na}}^{+}/\mathrm{Na}$ and ${\mathrm{Mg}}^{2+}/\mathrm{Mg},$ are -3.05,-2.73,-2.71 and -2.37 volts respectively which one of the following is strongest oxidising agent?

22. In a galvanic cell

23. Out of Cu, Ag, Fe and Zn , the metal which can displace all others from their salt solution is

24. A current of 9.65 ampere flowing for 10 minutes deposits 3.0g of the metal which is monovalent. The atomic mass of the metal is

25. What weight of copper will be deposited by passing 2 faradays of electricity through a cupric salt (At. wt. of Cu = 63.5)

26. If a strip of copper metal is placed in a solution of ferrous sulphate

27. What is the standard cell potential for the cell?
Zn ; ${\mathrm{Zn}}^{2+}/Z{n}^{2+}(1M)\parallel {\mathrm{Cu}}^{2+}(1M);\mathrm{Cu}$
${(E}^0$ for $Z{n}^{2+}/\mathrm{Zn}=-0.76;E^0$ for $C{u}^{2+}/\mathrm{Cu}=+0.34$

28. If a salt bridge is removed between the two half cells, the voltage

29. When the same quantity of electricity is passed through the solution of different electrolytes in series, the amounts of product obtained are proportional to their

30. In electrolysis of very dilute NaOH using platinum electrodes

31. The strongest reducing agent is

32. The charge on cobalt in [Co(CN${)}_6{]}^{-3}$ is

33. Oxidation number of oxygen atom in O2 molecule is

34. A reducing agent is a substance which can

35. Consider the reaction Zn + ${\mathrm{Cu}}^{2+}\to {\mathrm{Zn}}^{2+}\mathrm{Cu}$
With reference of the above, which one of the following is the correct statement?

36. Carbon is in the lowest oxidation state in

37. The oxidation number of Mn in ${\mathrm{KMnO}}_4$ is

38. In which of the following compounds transition metal is in zero oxidation state?

39. Oxygen has an oxidation state of +2 in

40. Which of the following is the strongest oxidizing agent?

41. In which reaction there is change in O.N. of N atom

42. Oxidation number of S in $S_2{O}_3^{2-}$ is

43. In the reaction, $H_2{O}_2+{\mathrm{Na}}_2{\mathrm{CO}}_3\to {\mathrm{Na}}_2{O}_2+{\mathrm{CO}}_2+H_{2}O\mathrm{.}$. The substance under going oxidation is

44. The process in which oxidation number increase is known as

45. In a reaction between zinc and iodine, zinc iodide is formed, what is being oxidized?

46. Which of the following reactions involves oxidation and reduction?

47. When iron is added to ${\mathrm{CuSO}}_4$ solution, copper is precipitated. It is due to