1.

What is the formula and method of preparation of Hypophosphoric oxyacid?

Answer»

`H_(4)P_(2)O_(6),"white"P_(4)+"ALKALI"`
`H_(4)P_(2)O_(5)," red "P_(4)+"alkali"`
`H_(4)P_(2)O_(5)," white "P_(4)+"alkali"`
`H_(4)P_(2)O_(6)," red "P_(4)+"alkali"`

SOLUTION :Red phosphorus undergoes disproportionation on reaction with alkali to form `H_(4)P_(2)O_(6) and PH_(3)`


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