1. Who invented paper ?

Answer:

Cai Lun

2. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

3. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

4. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895

5. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

6. Who invented Laser ?

Answer:

Charles H. Townes

7. Who invented X-ray ?

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