1. Who invented Piano ?

Answer:

Bartolomeo Cristofori

2. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

3. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

4. Who invented paper ?

Answer:

Cai Lun

5. Who invented google ?

Answer:

Larry Page

6. Who invented X-ray ?

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

7. Who invented HIV ?

Answer: