1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Hydrogen bomb ?

Answer:

Edward Teller

3. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

4. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

5. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

6. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

7. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885