JEE MAIN - Physics (2008 - No. 3)
This question contains Statement- 1 and Statement- 2. Of the four choices given after the statements, choose the one that best describes the two statements:
Statement- 1:
Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion and
Statement- 1:
Energy is released when heavy nuclei undergo fission or light nuclei undergo fusion and
Statement- 2:
For heavy nuclei, binding energy per nucleon increases with increasing $$Z$$ while for light nuclei it decreases with increasing $$Z.$$
Statement - $$1$$ is false, Statement - $$2$$ is true
Statement - $$1$$ is true, Statement - $$2$$ is true; Statement - $$2$$ is a correct explanation for Statement - $$1$$
Statement - $$1$$ is true, Statement - $$2$$ is true; Statement - $$2$$ is not a correct explanation for Statement - $$1$$
Statement - $$1$$ is true, Statement - $$2$$ is false
Explanation
We know that energy is released when heavy nuclei undergo fission or light nuclei undergo fusion. Therefore statement $$(1)$$ is correct.
The second statement is false because for heavy nuclei the binding energy per nucleon decreases with increasing $$Z$$ and for light nuclei, B.E/nucleon increases with increasing $$Z$$ and for light nuclei, $$B.E/$$nucleon increases with increasing $$Z.$$
The second statement is false because for heavy nuclei the binding energy per nucleon decreases with increasing $$Z$$ and for light nuclei, B.E/nucleon increases with increasing $$Z$$ and for light nuclei, $$B.E/$$nucleon increases with increasing $$Z.$$
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