1. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

2. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

3. Who invented Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

4. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

5. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

6. Who invented Computer ?

Answer:

Charles Babbage

7. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747