Which statement correctly describes kerogen?

Which statement correctly describes kerogen?

• A. It is disseminated organic matter insoluble in normal petroleum solvents.
• B. It is a liquid hydrocarbon.
• C. It is a mineral.
• D. It is a gas.

Answer: (A)

Kerogen is the solid, insoluble organic matter preserved in sedimentary rocks, and it acts as the source material that eventually generates petroleum. The key point is that it exists dispersed throughout the rock and does not dissolve in standard petroleum solvents. That insolubility in common solvents distinguishes it from liquid hydrocarbons like oil, and from minerals or gases. Over geological time, burial and heating transform kerogen into liquid and/or gaseous hydrocarbons, with the outcome (oil-prone, gas-prone) depending on the type of kerogen. So describing kerogen as disseminated organic matter insoluble in normal petroleum solvents captures its fundamental nature.

Kerogen is the solid, insoluble organic matter preserved in sedimentary rocks, and it acts as the source material that eventually generates petroleum. The key point is that it exists dispersed throughout the rock and does not dissolve in standard petroleum solvents. That insolubility in common solvents distinguishes it from liquid hydrocarbons like oil, and from minerals or gases. Over geological time, burial and heating transform kerogen into liquid and/or gaseous hydrocarbons, with the outcome (oil-prone, gas-prone) depending on the type of kerogen. So describing kerogen as disseminated organic matter insoluble in normal petroleum solvents captures its fundamental nature.