1.

Choose the incorrect formula out of the four compounds for an element X given below :

Answer»

`X_(2)Cl_(3)`
`X_(2)O_(3)`
`X_(2)(SO_(4))_(3)`
`XPO_(4)`

Solution :X is (+3) OXIDATION state in `X_(2)O_(3), X_(2)(SO_(4))_(3)` and `XPO_4`. Hence, the FORMULA of its chloride must be `XCl_(3)`


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