1.

The formula of th ephosphateof an element R is RPO_4, then the formulae of its hydroxide and sulphide respectively are _______are _______ .

Answer»

`R(OH)_3andR_3S_2`
`R(OH)_2andR_2S_3`
`R(OH)_2andR_3S_2`
`R(OH)_3andR_2S_3`

ANSWER :C::D


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