Here's why:

* Organic Chemistry: The study of compounds containing carbon and hydrogen is called organic chemistry. The presence of a C-H bond is a defining characteristic of organic compounds.

* Inorganic Chemistry: Inorganic chemistry deals with all other compounds, including those that lack carbon-hydrogen bonds. These compounds can be made up of various elements, such as metals, nonmetals, and metalloids.

Examples of Inorganic Compounds:

* Water (H₂O)

* Carbon Dioxide (CO₂)

* Sodium Chloride (NaCl)

* Iron Oxide (Fe₂O₃)

* Sulfuric Acid (H₂SO₄)

These compounds do not contain C-H bonds.