UnScramble this Word: e r n s i t k?

Questions

First synthetic detergent for home use marketed.?

George Gershwin's "Porgy and Bess" opened in New York City.?

Germany completed annexation of Czechoslovakia's Sudetenland.?

Chiang Kai-shek took the oath of office as president of China.?

Ben Vereen, dancer, actor, singer, born.?