What is the missing product of the following Fusion reaction

18 Shift 1 An active nucleus decays to one third 13 in 20 Hrs The fraction of original activity re maining after 80 Hrs is 1 a b 16 1 c d 36 1 812201 1 54

D A certain radioactive element has a half life of 20 years If we have a block with 10 g of the element in it after how many years will there be just 2 5 g of the element in the block a 80 years 40 years c 100 years 60 years b d 1995 2001

The plane wall of an oven is of thickness L 0 05 m and is exposed to the surrounding at 300 K The outer surface of the oven exposed to the surrounding is at temperature 320 K in steady state The energy radiated in W m by outer surface is proportional to the temperature difference between the surface and the surrounding with proportionality constant 20 W m K What is the temperature of inner surface of the oven in steady state if the wall has a thermal conductivity of K 0 5 W m K A 400 K C 380 K B 340 K D 360 K

Two radioactive sources A and B of half lives of 1 hour an 2 hours respectively initially contain the same number of radioactive atoms At the end of two hours their rates of disintegration are in the ratio of to

A nuclear fusion reaction is given below H H He n 3 2 MeV A How much energy will be generated when 2 kg of deuterons are fused approx 1 1030 eV D 2 5 x 1023 MeV 2 1022 Mo 4 1033 eV

Consider the following reaction HHHH Yer The atomic masses are given as m H 1 007825 u m H 2 014102 u m H 3 016049 u 4 0 linn ofteaq The Q value of the above reaction will be 1 4 03 MeV OP 2 2 01 MeV 3 2 01 MeV 4 4 03 MeV

When Th238 changes into Bi222 then the number 90 of emitted a and B particles are 2 4a 7B 4 4a 18 1 8a 7B 3 4a 4p men 5 svig toolqmsa 83 16 107

7 If E is the amount of energy released radioactive element having mass number A undergoes alpha decay then the velocity of alpha particle is 1 3 2Q VA 4 A 4 E 2 4 2 A 4 E V Ama 2AE

Which of the following statement is true A catalyst alter Gibbs energy of a reaction The action of the catalyst cannot be explaine by intermediate complex theory O A catalyst does not change the equilibrium constant of a reaction O Catalyst catalyses the non spontaneous reaction

09 There are two radio nuclie A and B A is an alpha emitter and B is a beta emitter Their distintegration constants are in the ratio of 1 2 What should be the ratio of number of atoms of two at time t 0 so that probabilities of getting a and particles are same at time t 0 A 2 1 C e B 1 2 D e