1. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

2. Who invented Nylon ?

Answer:

Wallace Carothers

3. Who invented Chemotherapy ?

Answer: Paracelsus of Switzerland

4. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

5. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

6. Who invented Floppy disk ?

Answer: IBM in 1970

7. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913