ANS:B - have very wide boiling points.

When referring to components of a binary system that "have very wide boiling points," it means that the boiling points of the two components are significantly different from each other. In this context, "wide" implies a substantial difference in boiling points between the components. Here's an explanation:

1. Boiling Points: The boiling point of a substance is the temperature at which it changes from a liquid to a gas at a given pressure. Different substances have different boiling points based on their molecular structure and intermolecular forces.
2. Wide Boiling Points: When the boiling points of the two components in a binary system are very different from each other, it means that one component has a significantly higher boiling point compared to the other. For example, one component may have a boiling point well above 100°C, while the other may have a boiling point below 100°C.
3. Effect on Separation: Components with very wide boiling points pose unique challenges for separation processes. Conventional distillation methods may not be efficient for separating such components because the temperature required to vaporize the component with the higher boiling point may cause significant degradation or loss of the component with the lower boiling point.
4. Alternative Methods: In cases where components have very wide boiling points, alternative separation methods may be more suitable. These methods could include techniques such as solvent extraction, liquid-liquid extraction, or fractional crystallization, which exploit differences in solubility, polarity, or other properties to achieve separation.

In summary, when components of a binary system have very wide boiling points, it means that there is a significant difference in boiling points between the two components. This characteristic can influence the choice of separation method and may require alternative approaches to achieve efficient separation.