a. A hydrocarbon contains all the three tyopes of H atoms, i.e., `1^(@), 2^(@)` , and `3^(@)` . The relative ratios of abstraction of …………………… H atoms are `5.0 : 3.8 : 1.0` .
c. The relative rate of abstraction of `3^(@) , 2^(@)` , and `1^(@)` H atoms is maximum for ................... H atoms.
d. The relative rate of abstraction of `3^(@) , 2^(@)` , and `1^(@)` H atoms is minimum for ................. H atoms.

Answer

To solve the question step by step, let's break down the information provided and analyze it systematically.

### Step 1: Understand the Types of Hydrogen Atoms
Hydrogens in hydrocarbons can be classified based on their degree of substitution:
- **1° (Primary) Hydrogen**: Attached to a carbon that is connected to only one other carbon.
- **2° (Secondary) Hydrogen**: Attached to a carbon that is connected to two other carbons.
- **3° (Tertiary) Hydrogen**: Attached to a carbon that is connected to three other carbons.

### Step 2: Analyze the Given Ratios
The problem states that the relative ratios of abstraction of the three types of hydrogen atoms are given as:
- 1° H: 5.0
- 2° H: 3.8
- 3° H: 1.0

### Step 3: Determine the Maximum Rate of Abstraction
From the ratios provided, we can see that:
- The highest ratio is for **1° H** (5.0), followed by **2° H** (3.8), and the lowest is for **3° H** (1.0).

Thus, the relative rate of abstraction of H atoms is maximum for **1° H**.

### Step 4: Determine the Minimum Rate of Abstraction
Conversely, the lowest ratio is for **3° H** (1.0). Therefore, the relative rate of abstraction of H atoms is minimum for **3° H**.

### Final Answers
- c. The relative rate of abstraction of 3° H, 2° H, and 1° H atoms is maximum for **1° H**.
- d. The relative rate of abstraction of 3° H, 2° H, and 1° H atoms is minimum for **3° H**.