1. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

2. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

3. Who invented X-ray ?

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

4. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

5. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.

6. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

7. Who invented Laser ?

Answer:

Charles H. Townes