1. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

2. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

3. Who invented Calculus ?

Answer: Newton of Britain in 1670.

4. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

5. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

6. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

7. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor