1. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

2. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

3. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

4. Who invented Hydrogen bomb ?

Answer:

Edward Teller

5. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

6. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

7. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.