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JEE Main 20202 SeptemberEvening Shift

Exam: JEE Main
Year: 2020
Date: 2 September
Shift: Evening Shift
Subject: Chemistry
Chapter: Redox Reactions

JEE Main 2020 · 2 September · Evening Shift · Chemistry · Redox Reactions

The oxidation states of transition metal atoms in K _ 2 Cr _ 2 O _...

The oxidation states of transition metal atoms in

{K}_{2}{Cr}_{2}{O}_{7}, {KMnO}_{4}

and

{K}_{2}{FeO}_{4},

respectively, are

x, y

and

z

. The sum of

x, y

and

z

is______

Correct answer

0

Step-by-step solution

Compound Oxidation state of transition element.

Oxidation states of K =+1 and O=-2

(i) ${K}_{2}{Cr}_{2}{O}_{7}x = + 6$
(ii) ${KMnO}_{4}y = + 7$
(iii) ${K}_{2}{FeO}_{4}z = + 6$
so $( x + y + z ) = 19$

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