FreeMCATPrep Logo

Support us and cryptocurrency!
Try a browser that's faster, safer, ad-free, and earns you cryptocurrency for using it! W3Schools


More Than 475 Free MCAT Questions with Detailed Answers!

Click HERE for your Random Question from our MCAT Question A Day Archive


MCAT Question A Day - 8/21/13 - Answer!

Current in an ionized gas sample depends on

A.  cations only.
B.  anions only.
C.  free electrons only.
D.  cations, anions, and free electrons.


The correct answer is (D). Conductivity in solids is due to free electrons; in electrolytic solutions, it is due to ions; in ionized gases, it is due to both ions and free electrons.