1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

3. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

4. Who invented Floppy disk ?

Answer: IBM in 1970

5. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

6. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

7. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams