Chemical Science Important Questions: Nuclear Chemistry! (Download PDF)

By Renuka Miglani|Updated : November 27th, 2021

Hello Aspirants,

Are you looking for some short and reliable notes during your CSIR-NET preparations? Then, you have come to a perfect place!

Candidates preparing for their CSIR NET exam might need to get some short study notes and strategies to apply while preparing for the key exam of their life. At this point, We at Byjus Exam Prep come up with short notes on Nuclear Chemistrywhich comes under the Inorganic Chemistry section of the Chemical Science syllabus. 

Our experienced subject matter experts have meticulously designed this set of short notes on Nuclear Chemistry to give you the most standard set of study materials to be focused upon. In this cut-throat competitive world, students need to prepare themselves with the best study materials to help them learn and for their future. So, here we are offering the best study notes that are reliable and can be used by the students during their preparations for the upcoming CSIR-NET 2021 exam.

Nuclear Chemistry (Download PDF)

1. The correct order of penetrating power of the following rays is:

  1. ϒ>β>α
  2. β>α> ϒ
  3. α> β> ϒ
  4. β> ϒ> α

2. Identify the pair of isotones from the options given below.


3. Which of the following properties differs in nuclear isomers?

  1. Neutron excess 
  2. Neutron
  3. Protons 
  4. Nuclear energy states

4. What will be the charge and mass no. of antineutrino particles respectively?

  1. 1,0
  2. 0,0
  3. 1,1
  4. -1,0

5. What will be the binding energy per nucleon (in Mev) for 21H (Atomic mass = 2.0141amu)?

Mass of neutron =1.0076 amu 

Mass of proton = 1.0089 amu

Mass of electron =5.45×10-4 amu

  1. 1.15 Mev
  2. 1.20 Mev
  3. 1.43 Mev
  4. 1.12 Mev

6. 214Bi83 undergoes alpha emission and forms A. A further undergoes two consecutive beta emission and forms D. Which of the following is the product of reaction?


7. What will be the product of the reaction: 225A100 (α,2n).

  1. 227M102
  2. 229M100
  3. 229M102
  4. 227M100

8. 237Np93 is a stable isotope, so 235Np93 is expected to undergo ...........emission.

  1. Βeta 
  2. Αlpha
  3. Gamma 
  4. Positron

9. The ratio of t1/2/tav  for a nuclear reaction is:

  1. 2
  2. ½
  3. 1/0.693
  4. 0.693

10. The half-life of 237Np93  is 4.5×109 years. What will be the activity of 1 g sample of 237Np93?

  1. 3.91×10-12 Bq
  2. 3.91×109  Bq 
  3. 1.24×104 Bq
  4. 1.24×109 Bq


Solution 1: The correct order of penetrating power of the rays is:

 ϒ>β>α and this order is experimentally determined.

Solution 2: Isotones are those species that have the same no. of neutrons. 

No. of neutrons (n) = A (Mass No.) –Z (At. No.)

 In 31H, (n) =3-1 =2 

 32He, (n) = 3-2 =1

157N, (n) = 15-7 =8

146C, (n) = 14 -6 =8 

147N, (n) =14-7 =7 

158O, (n) = 15-8 =7 

So, both 157N, 146C contain the same no. of neutrons, hence, they are a pair of isotones.

Solution 3: In nuclear isomers, we have the same no. of protons, same no. of electrons, neutrons and neutron excess is also the same, but energy levels contain different energies. An example is Co -58. This species has a half-life of 17 days.

Solution 4: There are two types of particles that are emitted during the radioactive process, neutrino, and Antineutrino. These are mainly used to balance the nuclear reactions statistics, energy, and spins. The mass and charge of antineutrino is 0 and 0 respectively.

Solution 5: 


Solution 6: 


Solution 7: 


Solution 8:


Solution 9:


Solution 10: 


Answer Keys

  1. A
  2. B
  3. D
  4. B
  5. D
  6. D
  7. A
  8. D
  9. D
  10. C

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