1. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

2. Who invented Submarine ?

Answer:

John Philip Holland

3. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

4. Who invented paper ?

Answer:

Cai Lun

5. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

6. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

7. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912