ONLINE TEST - Nuclear chemistry - EM

This Quiz is a Simple test for +2 Science group students which contain Questions asked from March - 2006 to March - 2017 in Nuclear chemistry. Just participate in it and test your skill.

1. ₉₂U²³⁵ Nucleus absorbs a neutron and disintegrates into ₅₄Xe¹³⁹, ₃₈Sr⁹⁴ and X. What is X?
3 neutrons
2 neutrons
α – particle
β – particle


2. After 24 hours 0.125 g of the initial quantity of 1 g of a radioactive isotope is left out. The half-life period is
24 hours
12 hours
8 hours
16 hours


3. Find out the missing: In a reaction ₅B⁸ → ₄Be⁸ + ?
α - particle
β - particle
electron capture
positron


4. Half life period of a radioactive element is 1500 years. Find the value of disintegration const
0.1465 x 10–10 sec–1
0.2465 x 10–10 sec–1
0.1465 x 10–8 sec–1
0.3645 x 10–10 sec–1


5. Half-life period of a radioactive element is 100 seconds. Its average life period is
100 seconds
50 seconds
200 seconds
144 seconds


6. In nuclear reaction____is / are balanced on both sides
mass
number of atoms
mass number
atomic number and mass number


7. Loss of β – particle is equivalent to
increase of one proton only
decrease of one neutron
none of these
both (a) and (b)


8. Radioactivity is due to
Stable electronic configuration
Stable nucleus
Unstable nucleus
Unstable electronic configuration


9. The isotope of which element is used in nuclear fusion reaction?
Barium
Lead
Uranium
Caesium


10. The most penetrating radiations are
α rays
β rays
γ rays
all are equally penetrating


11. The reaction ₅B⁸ → ₄Be⁸ takes place due to
α - decay
β - decay
electron capture
positron decay


12. When ₇N¹⁵ is bombarded with a proton it gives ₆C¹² and
α - particle
β - particle
neutron
proton


13. Which of the following is used as neutron absorber in nuclear reactors?
Water
Deuterium
Uranium
Cadmium


14. Which one of the following particles is used to bombard ₁₃Al²⁷ to give ₁₅P³⁰ and a neutron?
α - particle
Deuteron
Proton
Neutron


15. β - particle is represented as :
+1e0
– 1e0
1H1
2He4


16. The phenomenon of radioactivity was discovered by
Madam Curie
Pierre Curie
Henry Becquerel
Rutherford


17. Half-life period of ₇₉Au¹⁹⁸ nucleus is 150 days. The average life is
216 days
21.6 days
261 days
26.1 days


18. In the following radioactive decay, 92x232 → 89y220, how many α and β particles are ejected.
3 α and 3 β
5 α and 3 β
3 α and 5 β
5 α and 5 β


19. In the nuclear reaction, 92U238  → 82Pb206  the number of α and β particles emitted are,
7 α, 5 β
6 α, 4 β
4 α, 3 β
8 α, 6 β


20. In the nuclear reaction 90Th232 → 82Pb208 the number of α and β particles emitted are,
1α, 4β
2α, 2β
6α, 4β
8α, 4β


21. High speed projectiles may chip a heavy nucleus into several fragments in
Nuclear Fission reaction
Nuclear Fusion reaction
Spallation reaction
All of these


22. The average life τ of a radioactive element is
1/λ2
0.693/t1/2
1.44 t1/2
14.4 t1/2

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