JEE Advance - Physics (2013 - Paper 2 Offline - No. 20)
Match List I of the nuclear processes with List II containing parent nucleus and one of the end products of each process and then select the correct answer using the codes given below the lists :
| List I | List II | ||
|---|---|---|---|
| P. | Alpha decay | 1. | $$_8^{15}O \to _7^{15}N + ...$$ |
| Q. | $${\beta ^ + }$$ decay | 2. | $$_{91}^{238}U \to _{90}^{234}Th + ...$$ |
| R. | Fission | 3. | $$_{83}^{185}Bi \to _{82}^{184}Pb + ...$$ |
| S. | Proton emission | 4. | $$_{94}^{239}Pu \to _{57}^{140}La + ...$$ |
P-4, Q-2, R-1, S-3
P-1, Q-3, R-2, S-4
P-2, Q-1, R-4, S-3
P-4, Q-3, R-2, S-1
Explication
In alpha decay, atomic number decreases by 2 and mass number decreases by 4.
P $$\to$$ 2
In $$\beta$$+ decay, atomic number decreases by 1 and mass number remains unchanged.
Q $$\to$$ 1
In fission, heavy nucleus breaks into two light nuclei.
R $$\to$$ 4
In proton emission, both atomic number and mass number decreases by 1.
S $$\to$$ 3