1. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

2. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

3. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832

4. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

5. Who invented Calculus ?

Answer: Newton of Britain in 1670.

6. Who invented paper ?

Answer:

Cai Lun

7. Who invented Floppy disk ?

Answer: IBM in 1970