Which of the following statements is not true about low density polythene ?

Options

A. Tough
B. Hard
C. Poor conductor of electricity
D. Highly branched structure

Answer

To determine which statement is not true about low-density polyethylene (LDPE), we will analyze each option provided.

### Step 1: Understand the properties of low-density polyethylene (LDPE)
Low-density polyethylene is a type of polymer made from the polymerization of ethylene. It is characterized by its highly branched structure, which affects its physical properties.

### Step 2: Analyze each statement
1. **Tough**: LDPE is known to be tough due to its branched structure, which allows it to absorb impact without breaking easily. This statement is true.

2. **Hard**: LDPE is not considered hard. It is flexible and has a low density, which means it does not have the hardness associated with other types of polyethylene, such as high-density polyethylene (HDPE). This statement is not true.

3. **Poor conductor of electricity**: LDPE is a poor conductor of electricity because it is a non-metal. This statement is true.

4. **Highly branched structure**: LDPE has a highly branched structure, which contributes to its low density and flexibility. This statement is true.

### Conclusion
The statement that is not true about low-density polyethylene is that it is "hard." Therefore, the correct answer is option B: "hard."