1. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

2. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

3. Who invented Calculus ?

Answer: Newton of Britain in 1670.

4. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895

5. Who invented Laser ?

Answer:

Charles H. Townes

6. Who invented Hydrogen bomb ?

Answer:

Edward Teller

7. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams