1. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

2. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

3. Who invented Floppy disk ?

Answer: IBM in 1970

4. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

5. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

6. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

7. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.