1. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

2. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

3. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

4. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

5. Who invented Helicopter ?

Answer:

Igor Sikorsky

6. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

7. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798