1. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

2. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

3. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

4. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

5. Who invented Floppy disk ?

Answer: IBM in 1970

6. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

7. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849