Which of the following are basic oxides? Mn2O7, V2O3, V2O5, CrO, Cr2O3

Question

Which of the following are basic oxides? Mn2O7, V2O3, V2O5, CrO, Cr2O3 (A) Mn2O7 and V2O3 (B) V2O3 and CrO (C) CrO and Cr2O3 (D) V2O5 and V2O3

Tardigrade Admin · Accepted Answer

In case of transition metal oxides, the oxides with metals in lower oxidation states are basic in nature.

O . S .

of

M n

in

M n_{2} O_{7} = + 7

;

V

in

V_{2} O_{3} = + 3

;

V

in

V_{2} O_{5} = + 5

;

C r

in

C r O = + 2

;

C r

in

C r_{2} O_{3} = + 3

Thus in

V_{2} O_{3}

,

C r O

and

C r_{2} O_{3}

transition metal ion is in lower oxidation state but

C r_{2} O_{3}

is amphoteric in nature. Hence

V_{2} O_{3}

and

C r O

are basic in nature.

Q. Which of the following are basic oxides?
$M n_{2} O_{7}$ , $V_{2} O_{3}$ , $V_{2} O_{5}$ , $C r O$ , $C r_{2} O_{3}$