1. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

2. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

3. Who invented colour television ?

Answer:

Peter Carl Goldmark

4. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

5. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

6. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

7. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798