CBSE Guess > Papers > Important Questions > Class XII > 2007 > Chemistry > Nuclear Chemistry

Nuclear Chemistry

1. Give are example each of (i) a-emission (ii) b -emission (iii) k-capture. Write the equation for these nuclear changes.
2. What is Group Displacement Law? An element belonging to group 1 decays by b-emission. To which group of the periodic table the daughter element will belongs.
3. How many a and b particles will be emitted when 232/90 Th Changes into 208/82 Pb.
4. Write the nuclear reactions for the following radioactive decay.
   a) 238/92U Undergoes a - decay
   b) 234/91Pa Undergoes b - decay
   c) 22/11Na Undergoes b + decay
5. What is meant by nuclear binding energy calculate binding energy per nucleon of Li isotope, which has isotopic mass of 7.016 mu . The individual masses neutron and proton are 1.008665mu and 1.007277mu respectively and mass of electron is 0.000548mu.
6. A sample of wood from an archeological source shows a ¹⁴C activity which is 60% of the activity found in fresh wood today. Calculate the age of archeological sample
   (t1/2 of ¹⁴c =5770 years)
7. Explain the principle of (a) activation analysis and (b) Breeder reactor
8. Complete the following nuclear reaction
   a. 96/42Mo ( _______n) 97/43 Tc
   b. _______ (a, 2n ) 211/85 At
   c. 55/25Mn (n,c) ______
   d. 246/96Cm + 12/6 C --> ________ + 4 1/0 n
   e. 27/13Al (a, n) _______
   f. 238/92U (a, b-)________
9. Complete the equations for the following nuclear processes
   a. 3517Cl + 1/0n --> ________+ 4/2 He
   b. 235/92 U + 1/0 n --> _______+ 137/54 Xe + 2 1/0 n
   c. 27/13 Al + 4/2 He --> _______ + 1/0 n
   d. _______ (n, p) 35/16 S
   e. 239/94 Pu (a, b- ) _______
10. Describe the principle of an atom bomb. What is meant by critical mass? What is the critical mass of 235/92U?

1. Atomic Structure and Chemical Bonding
2. Solid States
3. Solutions
4. Thermodoynamics
5. Chemical Kinetics
6. Nuclear Chemistry
7. Polymers
8. Biomolecules
9. Chemistry In Every Day Life