Question

Assertion: Slow neutrons bring fission in $U^{235}$.

Reason: $U^{235}$ splits into only $X{e}^{142}$ and $S{r}^{90}$.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
  
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true
• E. Both Assertion and Reason are false

Answer 1

The correct option is C Assertion is true but Reason is false

Slow neutrons bring fission in U-235.
${}_{92}^{235}U+-0^{1}n{\to }_{54}^{142}Xe{+}_{38}^{90}Sr+4_0^{1}n+energy$
${}_{92}^{235}U+-0^{1}n{\to }_{56}^{141}Ba{+}_{36}^{94}Kr+3_0^{1}n+energy$
${}_{92}^{235}U+-0^{1}n{\to }_{55}^{144}Cs{+}_{37}^{90}Rb+2_0^{1}n+energy$