Chemist
Question : Select the correct indirect narration of the given sentence. The chemist said, “We do not have stock of this medicine now.”
Option 1: The chemist said that we do not have stock of this medicine now.”
Option 2: The chemist said that they are not having stock of that medicine now.
Option 3: The chemist said that we did not have stock of this medicine then.
Option 4: The chemist said that they did not have stock of that medicine then.
Correct Answer: The chemist said that they did not have stock of that medicine then.
Solution : The fourth option is the correct choice.
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Question : Which German chemist and physicist proposed that an aromatic compound must have an odd number of pairs of electrons, Which can mathematically be written as 4n+2 (n=0,1,2,3, etc.) in 1931?
Option 1: Friedrich Kekule
Option 2: Rosalind Franklin
Option 3: Erich Huckel
Option 4: Antoine Lavoisier
Correct Answer: Erich Huckel
Solution : The correct option is Erich Huckel.
German scientist and physicist Erich Huckel put up a theory in 1931 to assist in identifying whether an aromatic property would be present in a planar ring molecule. According to his rule, an aromatic, cyclic, planar molecule
Question : The number of elements known at the time of Russian chemist Dmitri Ivanovich Mendeleev was:
Option 1: 57
Option 2: 53
Option 3: 63
Option 4: 67
Correct Answer: 63
Solution : The correct answer is 63.
The Russian chemist Mendeleev made the greatest contribution to the creation of the periodic table, which arranged the elements according to similar chemical properties as well as their atomic mass, a fundamental property. At the time, only 63 elements were
Question : Which German chemist was the first to show a graphical representation of the periodicity of an atomic volume plotted against atomic weight?
Option 1: Julius Lothar Meyer
Option 2: John Newlands
Option 3: William Ramsay
Option 4: Glenn T. Seaborg
Correct Answer: Julius Lothar Meyer
Solution : The correct option is Julius Lothar Meyer.
The German chemist who first showed a graphical representation of the periodicity of an atomic volume plotted against atomic weight was Julius Lothar Meyer. Meyer, along with Dmitri Mendeleev, independently developed early versions of the
Question : In 1893, which Swiss chemist was the first to understand the molecular structures of inorganic substances – chemical compounds that do not contain carbon?
Option 1: Alfred Werner
Option 2: William Ramsay
Option 3: George de Hevesy
Option 4: John Dalton
Correct Answer: Alfred Werner
Solution : The correct option is Alfred Werner.
The first person to comprehend the molecular structures of inorganic substances, especially coordination compounds, was the Swiss chemist Alfred Werner in 1893. His groundbreaking work in coordination chemistry led to his proposal of the coordination theory, earning
Question : Two pipes can fill a tank in 20 minutes and 30 minutes, respectively. When the tank was empty, the two pipes were opened. After some time, the first pipe was stopped, and the tank was filled in 18 minutes. After how much time had passed since the start, was the first pipe stopped?
Option 1: 5 minutes
Option 2: 8 minutes
Option 3: 10 minutes
Option 4: 12 minutes
Correct Answer: 8 minutes
Solution : Let the total capacity of the tank = LCM of 20 and 30 = 60 units Efficiency of first pipe = $\frac{60}{20}$ = 3 Efficiency of second pipe = $\frac{60}{30}$ = 2 After $x$ minutes the first pipe was stopped, the first pipe worked
Question : Which German chemist used the technique of preparing hydrocarbons by electrolysis of solutions of salts of fatty acids?
Option 1: Cecilia Payne
Option 2: Marcellin Berthelot
Option 3: Giulio Natta
Option 4: Hermann Kolbe
Correct Answer: Hermann Kolbe
Solution : The correct option is Hermann Kolbe.
The German chemist who used the technique of preparing hydrocarbons by electrolysis of solutions of salts of fatty acids was Hermann Kolbe. He made significant contributions to the field of organic chemistry, and his work on electrolysis
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The Ph.D. program in Medicinal Chemistry, lasting for a duration of 3 years, is a research-oriented undertaking that pertains to the realms of Pharmacy and Pharmaceutical Sciences. Admission to the Ph.D. program in Medicinal Chemistry entails a written entrance examination, succeeded by final selection through personal
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