What Type of Compound Has Been Used to Replace Tetraethyl

question 50

Multiple Choice

What type of compound has been used to replace tetraethyl lead ((C₂H₅) ₄Pb) as an antiknock agent in gasoline?

• A)aromatic compounds
• B)olefins
• C)fluorochlorocarbons
• D)paraffins
• E)oxygenated hydrocarbons

---

Definitions:

Mast Cell

A type of white blood cell that plays a crucial role in the body's allergic response by releasing histamine and other chemicals during inflammatory and allergic reactions.

Wound Contracture

A condition where scar tissue contracts and tightens, often leading to restricted movement.

Secondary Union

The healing process of a wound where the edges are not closely approximated, resulting in granulation tissue filling the defect before epithelialization.

Scar Formation

The process of wound healing which results in fibrous tissue replacing normal skin or other tissue following injury or surgery.