1. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

2. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

3. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

4. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

5. Who invented Transistor ?

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

6. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

7. Who invented Piano ?

Answer:

Bartolomeo Cristofori