# A compound contains atoms of three elements  in A, B and C. If the oxidation number of A is +2, B is +5 and that of C is -2 , the possible formula of the compound is :

Piyush Kumar Maurya
65 Points
5 years ago
.The formula of a compound with elements A, B,C  will be of the form Ax ByCz  where x,y,z  are the atomicities of individual atoms respectively.
The oxidation numbers of the elements A,B,C  are  +2, +5and -2 respectively.
A compound is always neutral, so the oxidation number of the compound is zero. Hence, the net oxidation number of the individual atoms is zero.
2x + 5y -2z= 0

Restricting it to conditions that maximum oxidation state could be +8 or -3 , by Hit and Trial method, the possible solutions of (x,y,z) could be (1,2,6) or (3,2,8).
Both the sets are possible as the elements are unknown. Hence the compounds are A(BC3)or  A3B2C8
askIITians Faculty 628 Points
3 years ago
Dear student,
Please find the attached solution to your problem.

Let us assume the molecular formula of compound is Ax ByCz  where x,y,z  are the atomicities of individual atoms respectively.
Since, it is a neutral compound, hence net charge on it should be zero.
Hence, 2x + 5y – 2z = 0
Applying hit and trial method, we get two sets of positive integral solutions (1,2,6) and (3,2,8)
Hence, The compound could be either of A(BC3)2 or A3B2C8

Hope it helps.
Thanks and regards,
Kushagra