A heavy nuleus having mass number `200` gets disintegrated into two small fragmnets of mass numbers `80` and `120`. If binding energy per nulceon for parent atom is `6.5 MeV` and for daughter nuceli is `7 MeV` and `8 MeV`, respectivley , then the energy released in the decay will be.

Options

A. 200 MeV
B. (-)220 MeV
C. 220 MeV
D. 180 MeV

Answer

c

Explanation

Energy released is
`(80 xx 7 + 120 xx 6.5 )=220 MeV`