1.

The species that is not hydrolysed in water is

Answer»

`P_(4)O_(10)`
`BaO_(2)`
`Mg_(3)N_(2)`
`CaC_(2)`

SOLUTION :`underset("Orthophosphoric acid")(P_(4)O_(10)+ 6H_(2)O rarr 4H_(3)PO_(4))`
`Mg_(3)N_(2)+6H_(2)O rarr 3Mg(OH)_(2)+2NH_(3)`
`CaC_(2)+2H_(2)O rarr Ca(OH)_(2)+C_(2)H_(2)`


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