Question : Who first introduced the idea of a relationship between molecular geometry and the number of valence electrons in the 1940s?
Option 1: Bent and Nyholm
Option 2: Hendricus and Nicol
Option 3: Sidgwick and Powell
Option 4: Heitler and Gillespie
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Correct Answer: Sidgwick and Powell
Solution : The correct option is Sidgwick and Powell.
In 1940, Herbert Powell and Nevil Sidgwick proposed the notion that molecule shape and the number of valence electrons were correlated. They claimed that the number of valence electron pairs surrounding the core atom determines the shape of a molecule.
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Question : Electrons in the highest energy level of an atom are called ________.
Option 1: Valence protons
Option 2: Orbital protons
Option 3: Valence electrons
Option 4: Orbital electrons
Question : Which theory discusses the relationship between ligand bonding and degradation of d orbitals in metal complexes and the geometry of metal complexes and the splitting of d orbitals?
Option 1: Crystal field theory (CFT)
Option 2: Ligand field theory (LFT)
Option 3: Valence bond theory (VBT)
Option 4: Molecular orbital theory (MOT)
Question : The relationship between the rate of interest and level of consumption was first visualised by Which of the following?
Option 1: Amartya Kumar Sen
Option 2: Milton Friedman
Option 3: Irving Fisher
Option 4: James Duesenberry
Question : Which of the following statements is not correct regarding the alkali metals?
Option 1: All the alkali metals are silvery white, soft and light metals.
Option 2: The ionisation enthalpies of the alkali metals are considerably low and decrease down the group.
Option 3: Group 1 metals are known as alkali metals.
Option 4: All the alkali metals have two valence electrons.
Question : Who introduced a permanent settlement policy in 1793 to fix the revenue between East India Company and landlords?
Option 1: Lord Ripon
Option 2: Lord William Bentinck
Option 3: Lord Wellesley
Option 4: Lord Cornwallis
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