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 Optical Fibre ?

Answer:

Indian-born American physicist Narinder Kapany

4. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

5. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

6. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

7. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.