Higher order `(gt3)` reaction are rare due to :

Options

A. low probability of simultaneous collision of all the reacting species
B. increase in entropy and activation energy as more molecules are involved
C. shifting of equilibrium towards reactants due to elastic collisions
D. loss of active species on collision

Explanation

To solve the question regarding why higher order reactions (greater than 3) are rare, we can follow these steps:

### Step 1: Understand the concept of reaction order
- Reaction order refers to the number of molecules or species that must collide simultaneously for a reaction to occur. Higher order reactions involve more than three reactant molecules colliding at the same time.

### Step 2: Analyze the probability of simultaneous collisions
- For a reaction to occur, all the reactant molecules must collide with the correct orientation and sufficient energy. As the number of molecules involved increases, the likelihood of all of them colliding simultaneously decreases significantly.

### Step 3: Evaluate the options given in the question
- The options provided are:
1. Low probability of simultaneous collision of all the reacting species
2. Increase in entropy and activation energy as more molecules are involved
3. Shifting of equilibrium towards reactants due to elastic collisions
4. Loss of active species on collision

### Step 4: Identify the most relevant option
- Among the options, the first option, "low probability of simultaneous collision of all the reacting species," directly addresses the reason why higher order reactions are rare. The probability of more than three molecules colliding at the same time is extremely low, making such reactions uncommon.

### Step 5: Conclusion
- Therefore, the correct answer to the question is that higher order reactions (greater than 3) are rare due to the low probability of simultaneous collisions of all the reacting species.

### Final Answer:
Higher order (greater than 3) reactions are rare due to the low probability of simultaneous collisions of all the reacting species.

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