role of hydrogen peroxide in the above reaction is respectively

2:36

2:54

1:14

6:46

34:45

00:58

5:39

1:04:50

16:05

7:46

3:28

2:34

4:49

5:35

2:21

41:28

40:06

00:52

1:55

8:23

7:17

7:04

29:16

1:02

2:12

3:25

8:14

1:56

1:33

11:42

4:15

3:32

1:51

4:21

14:23

3:48

3:47

7:07

4:00

10:32

12:03

2:16

16:11

9:43

3:37

22:53

00:36

3:58

1:15

29:23

1:15

1:15

2:34

3:28

14:14

00:50

1:30

4:29

20:13

11:12