1. Who suggested the use of Freon as a non-toxic, non-flammable agent for refrigerators?

    Christopher Ingold

    Vladimir N. Ipatieff

    Thomas Midgley

    Fritz Haber

2. Who introduced 'electrocardiography' into medical practice for diagnosing certain ailments?

    William Einthoven

    Claude Bernard

    Lazzaro Spallanzani

    John Haldane

3. Who devised the tree-ring dating technique?

    Melvin Calvin

    J.B.S. Haldane

    Luis W Alvarez

    Andrew E. Douglass

4. Who showed that marine life exists at great depths?

    Jacques Yues-Cousteau

    George Bentham

    Edward Forbes

    A.A. Picard

5. Which chemist devised a process for the extraction of sulphur from underground deposits?

    Auguste Laurent

    Fritz Haber

    Hans Krebs

    Herman Frasch

6. Whose work led to the establishment of DNA fingerprinting as a tool to detect criminals?

    George Beadle

    Alex Jeffreys

    Francis Galton

    Francis Crick

7. Who identified the disease called "Kwashiorkor" which occurs in toddlers?

    Cicely Williams

    Walter B. Cannon

    Charles S. Sherrington

    Francis R Rous

8. Who showed that plants also reproduce sexually?

    Kasper Friedrich Wolff

    Carolus Linnaeus

    Nehemiah Grew

    Otto Friedrich Muller

9. Who advocated the use of rubber gloves for performing an operation?

    William Steward Halsted

    Alexis Carrel

    Werner Forssmann

    Gerhard Hansen

10. Who recommended the use of initial letters as chemical symbols for various elements?

    Jons Jakob Berzelius

    Claude Louis Berthellot

    Henry Cavendish

    Carl Wilhelm Schcele

11. Who found bacteria to be of several kinds and classified them?

    Otto Friedrich Muller

    Robert Hooke

    Francesco Redi

    Louis Pasteur

12. Who showed that blood transfusion was possible by means of his discoveries about blood?

    Walter Reed

    Karl Landsteiner

    William Harvey

    George Sternberg