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Paragraph for Questions 11 to 13 we have...

Paragraph for Questions 11 to 13 we have two radioactive nuclei A and B. Both convert into a stable nucleus C. Nucleus A converts to C after emitting two a particles and three | 15. erartides. Nucleus B converts into C after emitting one a particle and five B-particles. A timet -0, de of A are 4No and that of Bare No Half-life of A linto the conversion of C) is 1 min and that of Bis 2 min. Initially number of nuclei of Care zero. If atomic numbers and mass numbers of A and B are 21, 22, A, and A2 respectively. Then: 16. (1) Z, - 22=6 (2) A1 - A2 = 4 (3) both (1) and (2) are correct (4) both (1) and (2) are wrong What are number of nuclei of C, when number of nuclei of A and B are equal ? (1) 2N, (2) 3N, (3) N (4) 5N, IO At what time rate of disintegration of A and B are equal : (1) 4 minutes (2) 6 minutes (3) 8 minutes (4) 2 minutes Paragraph for Questions 14 to 16

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We have two radioactive nuclei A and B . Both convert into a stable nucleus C . Nucleus A converts into C after emitting two two alpha -particles and three beta -particles. Nucleus B converts into C after emitting one. alpha -particle anf five beta -particles. A time t = 0 , nuclei of A are 4N_(0) and that of B are N_(0) . Half-life of A (into the conversion of C ) is 1min and that of B is 2min . Initially number of nuclei of C are zero. At what time rate of disintergrations of A and B are equal.

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