1. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

2. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

3. Who invented Floppy disk ?

Answer: IBM in 1970

4. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

5. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

6. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

7. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683