1. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

2. Who invented Floppy disk ?

Answer: IBM in 1970

3. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

6. Who invented Submarine ?

Answer:

John Philip Holland

7. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.