Chocolate's addictive properties are due to what alkaloid?

More Questions:

From which country did the dance, "The Quadrille', originate?

In which play does Dame Pliant appear?

In which comic book did Batman make his first appearance?

Poseidon was the Greek god of what?

Who was the wife of King Cepheus of Æthiopia?

In which city is A Midsummer Nights Dream set?

Which state is directly south of Virginia?

What country is the "pearl of the orient seas"?

Like the majority of reptiles and fish, monotremes are mammals that do what?

Randy Poffo, who was a pitchman for Slim Jim, was better known by what name?

What candy does E.T. love?

Who was Araminta Ross known as?

Who was the first European explorer to cross the Arctic Circle?

What WWII European recovery program was named for the Secretary of State who proposed it?

Which character from The Simpsons tries to kill Bart Simpson on many occasions?