1. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

2. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

3. Who invented Hydrogen bomb ?

Answer:

Edward Teller

4. Who invented Submarine ?

Answer:

John Philip Holland

5. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

6. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

7. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888