Final answer:
No, calcium hydroxide is not a binary compound.
Step-by-step explanation:
Calcium hydroxide, with the chemical formula Ca(OH)₂, is not a binary compound. A binary compound is composed of two elements only, while calcium hydroxide contains three elements: calcium, oxygen, and hydrogen. It is formed by the reaction of calcium oxide with water, and it is commonly known as slaked lime or hydrated lime. The formula for calcium hydroxide is Ca(OH)₂, indicating the presence of more than two elements.