1. Who invented X-ray ?

Answer: W.K. Roentgen of Germany in 1895.

2. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

3. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

4. Who invented Biochemistry ?

Answer: Jan Baptista Van Helmont of Belgium in 1648.

5. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

6. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

7. Who invented Penicillin ?

Answer: Alexander Fleming of Britain in 1928.