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ICSE Class 10 Physics Question 22 of 27

Solved 2024 Question Paper ICSE Class 10 Physics — Question 11

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Question

Question 7(ii)

(a) Complete the following radioactive reaction :

−−X→−−Y+24He→91234Z+−10e_{-}^{-}\text X \rightarrow _{-}^{-}\text Y + _{2}^{4}\text {He} \rightarrow _{91}^{234}\text Z + _{-1}^{0}\text e

(b) Uranium is available in two forms U-235 and U-238. Which of the two isotopes of Uranium is more fissionable?

Answer

(a) 92238X→90234Y+24He→91234Z+−10e_{92}^{238}\text X \rightarrow _{90}^{234}\text Y + _{2}^{4}\text {He} \rightarrow _{91}^{234}\text Z + _{-1}^{0}\text e

(b) Comparatively speaking, U-235 is easier to fission than U-238 because only fast neutrons can cause the fission of U-238, whereas slow neutrons can even trigger the fission of U-235.