useless trivia: What Word Means: An Alkyd Radical?

Questions

This poisonous gas is in the exhaust fumes from cars?

This racist organisation was formed in Tennessee in 1865?

This radical Agrarian communist organization controlled Cambodia in the 1970s until the Vietnamese removed them from power.?

This re opened in 1975 after being closed for 8 years?

This science deals with the motion of projectiles?