1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

3. Who invented Nylon ?

Answer:

Wallace Carothers

4. Who invented Transistor ?

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

5. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

6. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

7. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.