Calcium hypochlorite is not available in which form?

Calcium hypochlorite is a widely used chlorine compound for water treatment, particularly for disinfection purposes. It typically exists in solid forms, which can include both granular and tablet forms. The significant aspect to understand is that calcium hypochlorite is a solid compound and can be easily handled in these forms.

The correct answer indicates that calcium hypochlorite is not available as a gas. This is because it does not transition into a gaseous state under normal conditions. Instead, its stable form allows it to be stored and transported as a solid, providing a reliable means of disinfection when dissolved in water.

In contrast, while there are liquid chlorine disinfectants primarily made from other chlorine compounds, such as sodium hypochlorite, calcium hypochlorite remains inherently a solid compound. Thus, one can see clearly that the absence of a gaseous form is what makes the correct answer stand out. It remains useful in environmental applications such as water treatment but only in solid or liquid contexts if it’s suspended or dissolved.