1. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

2. Who invented Neutron bomb ?

Answer:

Samuel T. Cohen

3. Who invented Safety Pin ?

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

4. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

5. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

6. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

7. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903