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UPSC General Studies Sample Paper General Studies Sample Paper-9

  • question_answer
    In a covalent bond, one or more electrons (often a pair of electrons) are drawn into the space between the atomic nuclei. Its formation can be best explained by

    A)  the available electrons in the highest energy level form the strongest bond

    B)  the electrons must have same spin

    C)  of two orbitals in an atom, the one that can overlap the most with an orbital from another atom will form the strongest bond

    D)  All of the above

    Correct Answer: C

    Solution :

    [c] The formation of covalent bond is explained by Valens Bond theory. Main postulates of which are The spins of the electrons have to be opposite. The available electrons in the lowest level form the stronges' bonds. Of two orbitals in an atom, the one that can overlap the most with an orbital from another atom will form the strongest bond and this bond will tend to lie in the direction of concentrated orbital.


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