________ is a soft-white metal that has been found as a contaminant in crude oil.
A) Vanadium
B) Gold
C) Silver
D) Mercury
E) Copper

Question

Quizplus · Accepted Answer

Vanadium is a common contaminant found in crude oil, and it is a soft-white metal. Gold, silver, and copper are all found naturally occurring in the earth's crust, but they are not commonly found as contaminants in crude oil. Mercury can also sometimes be found in crude oil, but it is a liquid metal at room temperature, not a soft-white solid like vanadium.

________ Is a Soft-White Metal That Has Been Found as a Contaminant