1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

3. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

4. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

5. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

6. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

7. Who invented Piano ?

Answer:

Bartolomeo Cristofori