Question

guided practice
which is a synthetic organic material?
a. acid
b. lead
c. crude oil
d. plastic

Explanation:

• Acid (A) can be inorganic (e.g., hydrochloric acid, $\text{HCl}$) or organic, but it is not inherently synthetic organic.
• Lead (B) is an inorganic metal element, not organic.
• Crude oil (C) is a naturally occurring mixture of organic compounds, not synthetic.
• Plastic (D) is a human-made (synthetic) organic polymer, fitting the definition of a synthetic organic material.

Answer:

D. plastic