Question

nya
.
Which of the following arrangements represent increasing oxidation number
of the central atom?
(1)
a) clO3^3-Cr04^2-, MnO4- , CrO2-
b) CrO4^2-, MnO4-, CrO2-, CIO3-
c) CrO2-, ClO3- , MnO4-, CrO42-
d) CrO2-, ClO3-, CrO4^2-, MnO4-​

Answer 1

Explanation:

Given elements are:

CrO

2

−

, CrO

4

2−

, ClO

3

−

and MnO

4

−

Let the oxidation number of central atom be 'x'.

Oxidation number of O=−2.

CrO

2

−

: x+2×(−2)=−1

x−4=−1 or x=+3

CrO

4

2−

: x+4×(−2)=−2

x−8=−2 or x=+6

ClO

3

−

: x+3×(−2)=−1

x−6=−1 or x=+5

MnO

4

−

: x+4×(−2)=−1

x−8=−1 or x=+7

increasing order of oxidation number of the central atom is:

CrO

2

−

<ClO

3

−Given elements are:

CrO

2

−

, CrO

4

2−

, ClO

3

−

and MnO

4

−

Let the oxidation number of central atom be 'x'.

Oxidation number of O=−2.

CrO

2

−

: x+2×(−2)=−1

x−4=−1 or x=+3

CrO

4

2−

: x+4×(−2)=−2

x−8=−2 or x=+6

ClO

3

−

: x+3×(−2)=−1

x−6=−1 or x=+5

MnO

4

−

: x+4×(−2)=−1

x−8=−1 or x=+7

increasing order of oxidation number of the central atom is:

CrO

2

−

<ClO

3

−

<CrO

4

2−

<MnO

4

−

<CrO

4

2−

<MnO

4

−