1.

Which reaction can be used to prepare phosphoric acid ?

Answer»

`P_2O_3 + H_2O OVERSET (20^@ C) rarr`
`P_2O_3 + H_2O overset (80^@ C) rarr`
`P_2O_3 + H_2O overset (25^@ C) rarr`
`P+ HNO_3rarr`

Answer :D


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