Who discovered the neutron?

1. 1. John Bardeen
   2. William Brag
   3. Henry Cavendish
   4. James Chadwick

Who invented the Cellophane?

1. 1. Le de Forest
   2. Alan. M. Turning
   3. F. Lanchestre
   4. J. Bradenberger

The theory of mutations was given by _____.

1. 1. Darwin and Lamarck
   2. Hugo de Vires
   3. Haldane
   4. Fleming

First chemical analysis of protoplasm was made by _____.

1. 1. Punnet and Bateson
   2. Scheiden
   3. Flaming
   4. Mende

Teflon used for coating non-stick kitchenware is the product of chance discovery by the scientist.

1. 1. Roy J. Pulunkett
   2. Johannes George Bednorz
   3. Karl Alexander Muller
   4. William Henry

Which of the following was invented in 1895 by King Camp Gillettee?

1. 1. Knife
   2. Pliers
   3. Safety razor
   4. Scissor

J.H Van’t Hoff was the first Nobel laureate in Chemistry. Which one of the following is not his contribution?

1. 1. Laws of Chemical Kinetics
   2. Laws of Osmotic Pressure
   3. Theory of Electrolytic Dissociation
   4. Chemical Stereochemistry

Who invented the Polio vaccine (Oral)?

1. 1. Janas Salk
   2. Burk Holder
   3. Robert Koch
   4. Albert Sabin

Who among the following received Nobel Prize for unravelling the helical structure of proteins?

1. 1. Linus Pauling
   2. Maurice Wilkins
   3. Sanger
   4. watson and Crick

Streptomycin was discovered by _____.

1. 1. Alexander Fleming
   2. S.A Waksman
   3. J. Salk
   4. Louis Pasteur