Q.
Start JEE / NEET / Foundation preparation at rupees 99/day !!
21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya
a
N2O → +1
b
NO2 → +2
c
N2O3 → +3
d
N2O5 → +5
answer is B.
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