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Q.

An element has an electronic configuration of 1s22s22p6 in its + 3 oxidation state. The formula of its sulphide is

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a

M3S2

b

MS2

c

MS3

d

M2S3

answer is D.

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Detailed Solution

Given M+3 has the configuration [Ne] then configuration of 'M' will be Ne3s23p1Valency of the element is ‘3’sulphide ion is S-2 Then formula of metal sulphide is M2S3
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An element has an electronic configuration of 1s22s22p6 in its + 3 oxidation state. The formula of its sulphide is