1. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

2. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

5. Who invented Floppy disk ?

Answer: IBM in 1970

6. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

7. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.