This question contains Statement-1 and statement-2. Of the four c… - Vidyadip

MCQ

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$-2$ : For heavy nuclei, binding energy per nucleon increases with increasing $Z$ while for light nuclei it decreases with increasing $Z.$

✓
Statement$-1$ is true, Statement$-2$ is false
B
Statement$-1$ is false, Statement$-2$ is true
C
Statement$-1$ is true, Statement$-2$ is true; Statement$-2$ is a correct explanation for Statement$-1$
D
Statement$-1$ is true, Statement$-2$ is true; Statement$-2$ is not a correct explanation for Statement$-1$

✓

Answer

Correct option: A.

Statement$-1$ is true, Statement$-2$ is false

a
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 $Z$

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