Answers

2015-06-03T22:26:14+05:30
1) substance oxidized - 4Na , substance reduced - O2 
2) substance oxidized - H2 , substance reduced - CuO
2 5 2
2015-06-04T11:00:58+05:30
In option 1 oxidized is 4Na and reduced is O2
in option 2 oxidized is   H2     and reduced is Cuo
1 1 1