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CBSE XII
>>
Chemistry
>>
p-Block Elements
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Q)
Which one of the following is a tetra basic acid ?
H
y
p
o
p
h
o
s
p
h
o
r
u
s
a
c
i
d
o
r
t
h
o
p
h
o
s
p
h
o
r
i
c
a
c
i
d
M
e
t
a
p
h
o
s
p
h
o
r
i
c
a
c
i
d
P
y
r
o
p
h
o
s
p
h
o
r
i
e
a
c
i
d
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