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ICSE Class 10 Physics Question 19 of 20

Solved 2019 Question Paper ICSE Class 10 Physics — Question 17

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Question

Question 10(b)

(i) Define nuclear fission. [3]

(ii) Rewrite and complete the following nuclear reaction by filling in the atomic number of Ba and mass number of Kr :

92235U_{92}^{235}\text{U} + 01n_{0}^{1}\text{n} ⟶ ...144Ba_{...}^{144}\text{Ba} + 36...Kr_{36}^{...}\text{Kr} + 3 01n_{0}^{1}\text{n} + Energy

Answer

(i) The process of splitting of a heavy nucleus into two lighter nuclei of nearly same mass, when bombarded with slow neutrons, is called nuclear fission.

(ii) 92235U_{92}^{235}\text{U} + 01n_{0}^{1}\text{n} ⟶ 56144Ba_{56}^{144}\text{Ba} + 3689Kr_{36}^{89}\text{Kr} + 3 01n_{0}^{1}\text{n} + Energy