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What is the general molecular formula of...

What is the general molecular formula of the products obtained on heating lanthanoid (Ln) with sulphur?

A

`LnS`

B

`LnS_3`

C

`Ln_3S_2`

D

`Ln_2S_3`

Text Solution

Verified by Experts

The correct Answer is:
D
`+3` oxidation state is most common for lanthanoids. So the chemical formula of its sulphide is `Ln^(3+) S^(2-) or Ln_2S_3`.
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