Procedure used to remove impurties from wool :

Question

Accepted Answer

The correct answer to the question "Procedure used to remove impurities from wool" is Option 1: Scouring.

1. **Explanation for Option 1 (Scouring):**
   Scouring is the process specifically used to remove impurities from wool. Wool, when sheared from sheep, contains a variety of impurities such as grease, dirt, sweat salts, and other contaminants. Scouring involves washing the wool in a series of baths containing water and detergents to effectively remove these impurities. This process is essential to ensure that the wool is clean and suitable for further processing into textiles. Scouring is a critical step in the wool processing industry and is specifically designed to address the unique impurities found in raw wool.

2. **Explanation for why other options are incorrect:**

- **Option 2 (Singeing):** Singeing is a process used in textile manufacturing to remove loose fibers or protruding threads from the surface of fabric by burning them off. It is not used for removing impurities from wool. Instead, singeing is typically applied to fabrics like cotton to create a smooth surface and improve the fabric's appearance.

- **Option 3 (Mercerizing):** Mercerizing is a treatment process applied to cotton fibers or fabrics to increase their luster, strength, and affinity for dyes. This process involves treating the cotton with a solution of caustic soda. Mercerizing is not applicable to wool and does not involve the removal of impurities.

- **Option 4 (Tentering):** Tentering is a finishing process used in the textile industry to stretch and set the fabric to a desired width and to remove wrinkles. It is not related to the removal of impurities from wool. Tentering is more about the final appearance and dimensions of the fabric rather than cleaning raw materials like wool.

In conclusion, scouring is the only process among the given options that is specifically designed to remove impurities from wool, making Option 1 the correct answer.