1. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

2. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

3. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

4. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

5. Who invented Submarine ?

Answer:

John Philip Holland

6. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

7. Who invented Radiocarbon ?

Answer:

Willard Libby