What chemical substance is the opposite of a base?

More Questions:

What is the fear of knees known as?

What type of animal is the Japanese monster, Kumonga?

Who created the Rubik's Cube?

At which university was the beverage Gatorade developed?

Which novelist created the character Helen West?

What Presidential medal did Helen Keller win?

What 1904 play was subtitled "The Boy Who Wouldn't Grow Up"?

What year was writer Arthur C. Clarke born?

What German composer lost his hearing at the age of 20?

The Luray Caverns can be found in which US state?

What river flows along the western border of Illinois?

What abbreviation comes from libra, meaning pound in Latin?

The shoe-obsessed Spats Colombo is the villain of what 1959 comedy?

What actor was the narrator in the 2006 movie "Charlotte's Web"?

In the original Star Trek series, what was Dr. McCoy's nickname?