Mark the incorrect used of the polymer.

Options

A. High density polythene - Buckets , pipes
B. Nylon 6,6 -Ropes , bristles for brushes
C. Orlon - Synthetic wool , carpets
D. Glyptal - Electrical switches , combs

Explanation

To determine the incorrect usage of the polymer from the given options, we will analyze each option step by step.

### Step 1: Analyze High-Density Polyethylene (HDPE)
- **Usage**: Buckets, pipes
- **Explanation**: High-density polyethylene is indeed used to manufacture various items such as buckets, pipes, dustbins, and bottles. This option is correct.

### Step 2: Analyze Nylon 6,6
- **Usage**: Ropes, bristles for brushes
- **Explanation**: Nylon 6,6 is an addition polymer made from hexamethylenediamine and adipic acid, and it is commonly used in textiles, ropes, and bristles for brushes. This option is also correct.

### Step 3: Analyze Orlon
- **Usage**: Synthetic wools, carpets
- **Explanation**: Orlon is a type of acrylic fiber that is resistant to sunlight and atmospheric gases, and it is used to manufacture synthetic wool and carpets. This option is correct as well.

### Step 4: Analyze Glyptal
- **Usage**: Electrical switches
- **Explanation**: Glyptal is an addition polymer of ethylene glycol and phthalic acid. It is primarily used in the manufacture of paints and coatings, not electrical switches. Therefore, this option is incorrect.

### Conclusion
- The incorrect usage of the polymer is related to Glyptal, which is not used for electrical switches but rather for paints and coatings.

### Final Answer
The answer is **D** (Glyptal used as electrical switches).

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