1. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

2. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

3. Who invented Vitamin A ?

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

4. Who invented colour television ?

Answer:

Peter Carl Goldmark

5. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

6. Who invented Proton ?

Answer:

Ernest Rutherford

7. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.