1. Who invented Helicopter ?

Answer:

Igor Sikorsky

2. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

3. Who invented Nylon ?

Answer:

Wallace Carothers

4. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

5. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

6. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

7. Who invented CT scan ?

Answer: Hounsfield by Britain in 1973.