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p-Block elements
Hard
Question
Ortho phosphoric acid on heating above 300
o
C gives :
Options
A.
hypophosphorus acid
B.
hypophosphoric acid
C.
metaphosphoric acid
D.
phosphorous acid
Solution
H
3
PO
4
H
4
P
2
O
7
(HPO
3
)
n
.
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H4P2O7 
(HPO3)n.