1. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

2. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

3. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

4. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

5. Who invented Ball-Point Pen ?

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

6. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

7. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.