Question

Nobel Prize was awarded to PaulMuller, on the discovery of which of the following pesticides?
A. Malathion
B. Parathion
C. Pyrethrum
D. DDT

Answer 1

Hint: Paul Muller otherwise called Pauli Mueller was a Swiss physicist who got the 1948 Nobel prize in Physiology or Medicine for his 1939 revelation of insecticidal characteristics and utilization of this in the control of vector infections, like intestinal sickness and yellow fever.

Complete answer:
The compound he had set in the confine was dichlorodiphenyltrichloroethane (DDT), or, all the more absolutely, 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane, which a Viennese pharmacologist named Othmar Zeidler had first combined in 1874. Zeidler, while distributing a paper about his amalgamation, had not examined the properties of the new compound, and had in this manner neglected to perceive its exceptional incentive as an insect poison.
Pauli Mueller (12 January 1899 – 13 October 1965) was a Swiss scientific expert who got the 1948 Nobel prize in Physiology or Medicine for his 1939 disclosure of insecticidal characteristics and utilization of DDT in the control of vector infections like intestinal sickness and yellow fever.
After his prosperity with tanning specialists and sanitizers, Muller was allocated to build up a bug spray. "Around then," as per The World of Anatomy and Physiology, "the lone accessible insect poisons were either costly normal items or fabricated materials incapable against creepy crawlies; the solitary mixtures that were both successful and reasonable were arsenic compounds, which were similarly as harmful to people and other mammals."Over the span of his examination, Muller found that creepy crawlies consumed synthetic substances uniquely in contrast to well evolved creatures. This persuaded it likely that there are synthetic compounds harmful only to bugs. He looked to "combine the ideal contact bug spray—one which would have a snappy and amazing poisonous impact upon the biggest conceivable number of creepy crawly species while making almost no damage to plants and warm-blooded creatures.

So the correct answer is DDT.

Note:
He concentrated all the information he could discover regarding the matter of insect poisons, chose which substance properties the sort of insect spray he was looking for would display, and embarked to locate a compound that would suit his motivations. Muller went through four years looking and bombed multiple times previously, in September 1939, he found the compound he was searching for. He put a fly in an enclosure bound with one specific compound, and a brief time later, the fly died.