Petroleum Is Separated into Fractions in the Refining Process

question 32

Multiple Choice

Petroleum is separated into fractions in the refining process. Which of the following fractions has molecules with the largest size?

• A) gas
• B) kerosene
• C) paraffin wax
• D) straight-run gasoline

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Definitions:

Epinephrine (Adrenaline)

A hormone and neurotransmitter involved in the body's fight-or-flight response, increasing heart rate, muscle strength, blood pressure, and sugar metabolism.

Cytokines

These chemical messengers are produced by the body as part of its immune response. These proteins can either promote inflammation or reduce it.

Dopamine

A neurotransmitter and a hormone that serves many functions in the body. As a neurotransmitter, it is involved in several brain processes, including reward systems. Low levels of dopamine production are associated with Parkinson’s disease.

Lifespan

The duration of time an individual lives, from birth to death, taking into consideration the developmental stages and transitions faced over the years.