What is it that turns blue litmus paper red?

More Questions:

Who invented the Gatling gun?

What large island is south of Melbourne, Australia?

Which state is home to the Pribilof Islands?

What is the nickname for Rome, Italy?

What are the four main ingredients of concrete?

How many sides does a nonagon have?

What fraction of the Earth's gravity is the moon's?

What is the common name for hydrogen hydroxide?

Who won part 1 of the final "Head Of Household" competition in season 14 of the TV show "Big Brother"?

Craig Phillips was the first winner of which TV reality show?

Paul Winchell was the original voice for which Winnie-the-Pooh character?

How many fingers does Mickey Mouse have?

When did the Massacre of Glencoe occur?

What Romanian communist president was shot in December 1989?

Whom did David Steel succeed as Leader of the Liberal Party?