Nucleus consists of neutrons and protons, neutrons and protons inside the nucleus interact with each other. They interchange into each other. The forces between them are charge independent. short range, mutual non conservative, strongly attractive. But many particles are emitted like `alpha, beta, gamma` rays and other high energy particles as mesons, leptons, baryons etc. Can you match the classification of particles in Column-1 with their characters in Coloumn-II.
`{:("Column-I","Column-II"),((A)"Chargeless integral spin particle",(p)"Pion"),((B)"Chargeless half spin particle",(q)"Photon"),((C)beta-"particle",(r)"Neutrino"),((D)"Exchange particle",(s)"Positron"):}`

Answer

To solve the problem of matching the classification of particles in Column-I with their characteristics in Column-II, we can follow these steps:

### Step 1: Analyze Column-I
We have the following particles in Column-I:
- (A) Chargeless integral spin particle
- (B) Chargeless half-spin particle
- (C) Beta particle
- (D) Exchange particle

### Step 2: Analyze Column-II
We have the following characteristics in Column-II:
- (p) Pion
- (q) Photon
- (r) Neutrino
- (s) Positron

### Step 3: Match A with Column-II
- **Chargeless integral spin particle (A)**: This refers to particles with an integral spin (0, 1, 2, etc.) and no charge. The photon is a well-known example of a chargeless integral spin particle (spin-1).
- **Match**: (A) → (q) Photon

### Step 4: Match B with Column-II
- **Chargeless half-spin particle (B)**: Particles with half-integer spins (1/2, 3/2, etc.) are fermions. The neutrino is a chargeless particle with a half-integer spin (spin-1/2).
- **Match**: (B) → (r) Neutrino

### Step 5: Match C with Column-II
- **Beta particle (C)**: A beta particle can be either an electron (beta minus) or a positron (beta plus). Since positron is also a beta particle and is charged, we can classify the beta particle as a high-energy electron or positron.
- **Match**: (C) → (s) Positron

### Step 6: Match D with Column-II
- **Exchange particle (D)**: Exchange particles mediate interactions between other particles. Pions are known to be exchange particles in the context of nuclear forces, facilitating the interaction between nucleons (neutrons and protons).
- **Match**: (D) → (p) Pion

### Final Matches
Based on the analysis, the final matches are:
- (A) → (q) Photon
- (B) → (r) Neutrino
- (C) → (s) Positron
- (D) → (p) Pion

### Summary of Matches
- A → q
- B → r
- C → s
- D → p