1. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

2. Who invented Atomic theory ?

Answer: Dalton of Britain in 1803.

3. Who invented Nylon ?

Answer:

Wallace Carothers

4. Who invented Automatic rifle ?

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

5. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

6. Who invented Radiocarbon ?

Answer:

Willard Libby

7. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm