1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table

3. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.

4. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

5. Who invented Nylon ?

Answer:

Wallace Carothers

6. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.

7. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805