The two physical properties of `KM_No_4` of considerable interest are
I. high temperature dependent paramagnetism
II. low temperature dependent paramagnetism
III. Intense colour
Choose the correct option.

Options

A. I and III
B. II and III
C. I and II
D. Only III

Answer

To solve the question regarding the physical properties of potassium permanganate (KMnO4), we will analyze each of the given options and determine which two properties are of considerable interest.

### Step 1: Understanding the Properties of KMnO4
- **Paramagnetism**: This is a property of materials that are attracted by a magnetic field due to the presence of unpaired electrons. KMnO4 is known to exhibit paramagnetism.
- **Color**: KMnO4 is known for its intense purple color, which is a significant characteristic of this compound.

### Step 2: Analyzing Each Statement
1. **High temperature dependent paramagnetism**: This statement suggests that KMnO4 exhibits paramagnetism that is dependent on high temperatures. However, KMnO4 actually shows low temperature dependent paramagnetism due to the presence of unpaired electrons in the manganese ion (Mn^7+). Therefore, this statement is incorrect.

2. **Low temperature dependent paramagnetism**: This statement is correct. KMnO4 does exhibit low temperature dependent paramagnetism, which is a notable property of the compound.

3. **Intense color**: This statement is also correct. KMnO4 is well-known for its intense purple color, which is a significant characteristic of this compound.

### Step 3: Conclusion
From the analysis:
- The first statement is incorrect.
- The second statement is correct.
- The third statement is correct.

Thus, the two physical properties of considerable interest for KMnO4 are:
- Low temperature dependent paramagnetism
- Intense color

### Final Answer
The correct option is the one that includes:
- Low temperature dependent paramagnetism
- Intense color