ABC26IN1332 · Consider following statements for fission of U235 with thermal neutrons. A. The % of nuclei undergoing unsymmetrical fission is maximum. B… · JUNE 2017
ABC26IN1335 · The nuclides among the following, capable of undergoing fission by thermal neutrons, are (A) 233U (B) 235U (C) 239Pu (D) 232Th · JUNE 2014
ABC26IN0748 · For the following fusion reaction, 4 1 H 4 He+2 beta ++2 + gamma the Q-value (energy of the reaction) in MeV (rounded off to one decimal… · 2005-2022
Isotope Applications
ABC26IN0740 · In boron neutron capture therapy, the initial boron isotope used and the particle generated after neutron capture respectively are: · 2005-2022
ABC26IN0743 · The isotope 84214 Po undergoes one alpha and one beta particle emission sequentially to form an isotope " X ". The number of neutrons in "… · 2005-2022
ABC26IN1339 · In 'carbon-dating' application of radioisotopes, 14C emits · JUNE 2012
Nuclear Chemistry – General
ABC26IN0216 · A and C 4. C only · 2019self-practice
ABC26IN1328 · Identify from following the products of K-electron capture by the nucleus: (A) neutron (B) neutrino (C) positron Answer is · DEC 2019
ABC26IN0735 · 84215 Po undergoes an alpha emission to give element X followed by a beta emission to give element Y . (i) Write the valence shell… · 2005-2022self-practice
ABC26IN0736 · In the process 92234 U 90230 Th+X X is: · 2005-2022
ABC26IN0738 · In the following equation X is: 95241 Am+ alpha 97243 Bk+X · 2005-2022
ABC26IN1333 · Spin motion of which of the following gives magnetic moment · DEC 2015self-practice
ABC26IN0742 · A wood specimen containing 14 C taken from an ancient palace showed 24 counts in 3 minutes per gram of carbon in a detector. however, a… · 2005-2022self-practice
ABC26IN0224 · The particles postulated to always accompany the positron emission among are: (A) neutrino, (B) anti-neutrino, (C) electron, · 2014
ABC26IN1337 · The particles postulated to always accompany the positron emission among are: (A) neutrino (B) anti-neutrino (C) electron · JUNE 2014
ABC26IN1338 · For neutron activation analysis of an element, the favourable characteristics of both the target and the product are from the following… · JUNE 2013
Nuclear Reactions Q Value
ABC26IN0215 · A and B 3. B and C 2. A and C 4. C only · 2020
ABC26IN1327 · Consider the nuclear reaction 92 X234+ beta + alpha Y+ gamma +2 beta + Y is · JUNE 2011
ABC26IN0219 · Among the following nuclear reactions of thermal neutrons, the cross section is highest for: · 2017self-practice
ABC26IN1330 · Among the following nuclear reactions of thermal neutrons, the cross section is highest for: · DEC 2017
ABC26IN0220 · Which one of the following pairs has two magic numbers for closed nuclear shells? · 2017self-practice
ABC26IN0221 · Choose the correct statement for magnitude of threshold energy of an endoergic nuclear reaction between stationary nucleus and a moving… · 2017self-practice
ABC26IN0737 · Complete the following nuclear reactions: (i) 714 N+ 24 He 11 H+ ____ (ii) 37 Li+ 11 H ____ · 2005-2022self-practice
ABC26IN1331 · Choose the correct statement for magnitude of threshold energy of an endoergic nuclear reaction between stationary nucleus and a moving… · JUNE 2017
ABC26IN0222 · Identify radioactive capture from the following nuclear reactions: · 2015self-practice
ABC26IN1334 · Identify radioactive capture from the following nuclear reactions: · DEC 2015
ABC26IN0223 · For a low energy nuclear reaction, 24Mg\,(d, alpha )\,22Na, the correct statements from the following are · 2014
ABC26IN1336 · For a low energy nuclear reaction, 24 Mg(d, alpha )22 Na, the correct statements from the following are · JUNE 2014
ABC26IN1340 · For the nuclear reactions. (A) 48Be 2\,24He (B) 3680Kr 2\,1840Ar (Given masses: 8Be = 8.005300, 4He = 4.002603 and 3680Kr = 79.81638… · DEC 2011
ABC26IN1341 · The species 19 Ne and 14 C emit a positron and beta -particle respectively. The resulting species formed are respectively · JUNE 2011
Nuclear – General
ABC26IN0480 · Among the following, the most stable isotope to radioactive decay is · 2005-2021
ABC26IN0481 · 210Bi undergoes beta - decay to 1/8 of its initial amount in 15 days. The time required for its decay to 1/4 of its initial amount is ____… · 2005-2021
ABC26IN0482 · The total number of alpha and beta particles emitted in the following radioactive decay is ____ 92238 U 82210 Pb · 2005-2021
ABC26IN0483 · The fission reaction of 92235 U with thermal neutron is represented below. 4199 Nb and 51133 Sb are the primary fission fragment pair… · 2005-2021
ABC26IN0484 · Given the initial weight of 1 mg of radioactive 2760 Co (half-life =5.27 years), the amount disintegrated in 1 year (rounded off to two… · 2005-2021self-practice
Radioactive Decay Kinetics
ABC26IN0732 · The radioactive isotope used to locate brain tumors is · 2005-2022
ABC26IN0733 · The radioactive element Ra(Z=86) emits three alpha particles in succession. Deduce in which group the resulting element will be found? · 2005-2022
ABC26IN0734 · The half-life of a radioactive nuclide is 20 years. If a sample of this nuclide has an activity of 6400 disintegrations per minute… · 2005-2022
ABC26IN0739 · The total number of steps involved and number of beta particles emitted in the spontaneous decay of 92238 U 82206 Pb respectively, are · 2005-2022
ABC26IN0741 · The number of alpha and beta particle(s), generated in the following radioactive decay process, are: 92238 U 92234 U · 2005-2022
ABC26IN0744 · A radioactive element undergoes 80 \% radioactive decay in 300 min. The half-life for this species in minutes is ____ · 2005-2022
ABC26IN0745 · The decay modes of 14 C and 14 O are · 2005-2022self-practice
ABC26IN0746 · 24 Na decays to one-fourth of its initial amount in 29.8 hours. Its decay constant is ____ hour -1 (rounded up to four decimal places). · 2005-2022self-practice
ABC26IN0747 · A radioactive sample decays to 10 \% of its initial amount in 4600 minutes. The rate constant of this process is ____ hour -1 (Round off to… · 2005-2022self-practice