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
Ba→Ba+2+2e−
b
Be→Be+2+2e−
c
Ca→Ca2++2e−
d
Mg→Mg2++2e−
answer is B.
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