1. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

2. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

3. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

4. Who invented Vitamin A ?

Answer: Mc Collum and M.Davis of U.S.A. in 1913

5. Who invented Safety razor ?

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

6. Who invented Television ?

Answer:

John Logie Baird

7. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.