Who, amongst the following, discovered that the atoms of some naturally-occurring elements were not exactly alike and when?

1. 1. F.W. Aston-1919
   2. Neils Bohr-1913
   3. Albert Einstein-1911
   4. Dalton-1909

Who, amongst the following, was the first to observe ultra violet rays and when?

1. 1. William Harschel-1800
   2. Johann Wilhelm Ritter-1801
   3. Rutherford-1911
   4. Auguste Comte-1844

Who invented the Lift and when?

1. 1. Michael Faradary-1831
   2. E.G. Otis-1852
   3. Thomas Alva Edison- 1879
   4. John Logie Barid-1926

Who invented Radar?

1. 1. J. H. Van Tassel
   2. Wilhelm K. Roentgen
   3. P.T. Farnsworth
   4. A.H. Taylor and Leo C. Young

Who invented the Microprocessor?

1. 1. Robert Noyce and Gordon Moore
   2. Georges Claude
   3. Gregory Pincus
   4. Michael de Bakey

Who invented optical fiber?

1. 1. Samuel Chohen
   2. Narinder Kapany
   3. Percy L. Spencer
   4. T.H. Maimah

Who invented the hydrogen bomb?

1. 1. J. Robert Oppenheimer
   2. Albert Einstein
   3. Samuel Cohen
   4. Edward Teller

Fluorine deficiency in human beings leads to _____.

1. 1. Dental caries
   2. Fluorosis
   3. Fibrosis
   4. Follicular necrosis

The wonder drug Penicillin was discovered by _____.

1. 1. Louis Pasteur
   2. Alexander Fleming
   3. Edward Jenner
   4. Jonas Salk

Electron was discovered by _____.

1. 1. Ernest Rutherford
   2. Max Planck
   3. Joseph Thomson
   4. Albert Einstein