1. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

2. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

3. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

4. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

5. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

6. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

7. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland