Question : In 1957, who redefined a model that predicted the shape of individual molecules based on the extent of electron-pair electrostatic repulsion?
Option 1: Nyholm and Gillespie
Option 2: Heitler and London
Option 3: Staudinger and Perry
Option 4: Marcet and Pauling
Correct Answer: Nyholm and Gillespie
Solution : The correct answer is Nyholm and Gillespie.
In 1957, two chemists, Ronald Gillespie from Canada and Ronald Nyholm from Australia, came up with the VSEPR (Valence Shell Electron Pair Repulsion) theory. This theory provides a new way to predict the shape of individual molecules based on the extent of electrostatic repulsion between electron pairs.
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Question : Who explained the structure of a protein?
Option 1: RF Rose
Option 2: Emil Fischer
Option 3: Johnson and Christie
Option 4: Pauling and Corey
Question : Whose invention led to the development of the polio vaccine?
Option 1: Ernst Haeckel
Option 2: Jonas Salk
Option 3: Linus Pauling
Option 4: Robert Wellberg
Question : The unification of Karnataka was achieved in the year:
Option 1: 1956
Option 2: 1957
Option 3: 1958
Option 4: 1960
Question : The nucleus of an atom consists of
Option 1: Proton
Option 2: Neutron
Option 3: Proton, and Neutron
Option 4: Electron, Proton, and Neutron
Question : J. J. Thomson's proposed model of action is generally called ........................model.
Option 1: cream and cake
Option 2: plum pudding
Option 3: plum and cake
Option 4: cream and pudding
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