AP EAPCET 25-Aug-2021 Shift 1 Paper

Section: Chemistry

Question : 154 of 160

Marks: +1, -0

The transition metal in which of the following compound has zero oxidation state?

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S.No.	Compound	Oxidation state of metal
1.	K2Cr2O7	2(+1)+2(x)+7(−2)=0 x=+6 i.e. Cr=+6 Here, oxidation state of K=1 Oxidation state of O=−2
2.	KMnO2	1+x+(−8)=0 x=+7 i.e. Mn=+7 Here, oxidation state of K=1
3.	CrO5	x+5(−2)=0 x=+10 i.e. Cr=+10
4.	Fe(CO)5	x+5(0)=0 x=0 i.e. Fe2=0 Here, CO is a neutral ligand thus Fe is having oxidation number =0