1. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

2. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

3. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

4. Who invented Radiocarbon ?

Answer:

Willard Libby

5. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

6. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

7. Who invented Hydrogen bomb ?

Answer:

Edward Teller