Bithional is added to soaps to impart them ………..properties.

Explanation

**Step-by-Step Solution:**

1. **Understanding Bithional**: Bithional is a chemical compound that is commonly used in the formulation of soaps, particularly toilet soaps.

2. **Properties of Bithional**: The primary property that bithional imparts to soaps is its ability to act as an antiseptic. This means it helps to prevent the growth of bacteria and other microorganisms.

3. **Function of Bithional in Soaps**: Bithional is added to soaps to combat unpleasant odors that arise from bacterial decomposition of organic matter. When bacteria break down organic materials, they can produce foul-smelling compounds. By using bithional, the growth of these bacteria is inhibited, thus reducing bad odors.

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