This type of oil contains fewer heavy molecules and more intermediates than black oils.

This type of oil contains fewer heavy molecules and more intermediates than black oils.

• A. Heavy oil
• B. Medium oil
• C. Light crude
• D. Volatile oil

Answer: (D)

Volatility in oil is tied to how light or heavy the hydrocarbon molecules are. Oils with fewer heavy, long-chain molecules have more of the mid-range, intermediate-size hydrocarbons that sit between the very light gases and the heavy, viscous fractions. That’s what makes the oil more volatile and gives it a higher proportion of intermediates compared with black oils, which are dominated by heavy, long-chain molecules and are less prone to vaporize. So the description fits volatile oil best.

Volatility in oil is tied to how light or heavy the hydrocarbon molecules are. Oils with fewer heavy, long-chain molecules have more of the mid-range, intermediate-size hydrocarbons that sit between the very light gases and the heavy, viscous fractions. That’s what makes the oil more volatile and gives it a higher proportion of intermediates compared with black oils, which are dominated by heavy, long-chain molecules and are less prone to vaporize. So the description fits volatile oil best.