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JEEMAIN and NEET
>>
Chemistry
>>
p-Block Elements
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Q)
Allotropes of oxygen are :
(
a
)
O
4
a
n
d
O
2
(
b
)
O
3
a
n
d
O
2
(
c
)
O
2
a
n
d
O
3
(
d
)
O
a
n
d
O
2
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