CH_2=CH_2+O_(2)overset(" onestepoxidation")underset("metal ions")rarrunderset("90%yied")(CH_3CHO)Oxidation states of metal ions used

CH_2=CH_2+O_(2)overset(" onestepoxidation")underset("metal ions")rarru

1.	CH_2=CH_2+O_(2)overset(" onestepoxidation")underset("metal ions")rarrunderset("90%yied")(CH_3CHO)Oxidation states of metal ions used
Answer» `+ 2, + 4` `+ 2, + 2 ` `- 2, - 3` `+ 2, - 3` ANSWER :D