Coordinate Bond

A covalent bond is a chemical bond formed by mutual sharing of electron pairs between two atoms. A coordinate bond is a special type of covalent bond in which both the electrons of the shared pair come from one of the two combining atoms. Coordinate bond is also known as dative bond. This type of bond is always formed between two dissimilar atoms. The atom which provides the electron pair for the formation of coordinate bond is called donor. The atom or ion sharing the donated electron pair is known as the acceptor. The coordinate bond is a directional bond. A coordinate bond has properties of both covalent and ionic bonds. Therefore, it is also called as co-ionic bond. Ammonium ion and hydronium ion have coordinate bonds.

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  • Q1

    When a single atom provides both electrons which are required for completion of covalent bond, then it leads to formation of

    Marks:1
    Answer:

    dative bond.

    Explanation:

    The bond formed between two atoms, by a pair of electrons provided entirely by one of the combining atoms is called the coordinate bond or dative bond.

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  • Q2

    Condition which is not required for formation of a coordinate bond is

    Marks:1
    Answer:

    one atom must be of a metal and another must be of a non–metal

    Explanation:

    For the formation of coordinate bond it is not essential that one atom is of a metal and another is of a non–metal. This condition is necessaruy for the formation of ionic bond.

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  • Q3

    Pick the correct statement about coordinate bond.

    Marks:1
    Answer:

    This bond has properties of both covalent and ionic bonds.

    Explanation:

    A coordinate bond has properties of both covalent and ionic bonds.

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  • Q4

    A compound that contains one lone pair of electrons is

    Marks:1
    Answer:

    ammonia.

    Explanation:

    The nitrogen atom in an ammonia molecule contains a lone pair of electrons.

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  • Q5

    An ion having dative bond in its structure is

    Marks:1
    Answer:

    H3O+

    Explanation:

    Structure of H3O+ ion is

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