Answer
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Hint: The type of bonding in which both shared electrons are donated by the same atom is known as coordinate bonding. It is also known as dative bonding and it is a directional bond i.e., sharing of electrons takes place in a definite direction.
Complete answer:
Water: In the molecule, an oxygen atom is covalently bonded to two hydrogen atoms forming a bent shape structure. The structure of water molecule is as follows:
Ammonia: In the molecule, the nitrogen atom is covalently bonded to the three hydrogen atoms forming a tetrahedral structure. The structure of ammonia is drawn as follows:
Ammonium ion: In this ion, the fourth hydrogen atom is attached to the nitrogen atom via coordinate bond because the valency of nitrogen is completed but it still has a lone pair to donate to the hydrogen nucleus. Although the representation of bonds is done differently, they are almost similar to the covalent bonds. The structure of ammonium ion is as follows:
Ethylene: It is an unsaturated hydrocarbon consisting of two carbon atoms covalently bonded to each via triple bond and two hydrogen atoms are attached via single bond. The structure of ethylene is represented as follows:
\(HC \equiv CH\)
Hence, the compound which contains covalent coordinate bonds is ammonium ion.
Thus, option (C) is the correct answer.
Note:
Both covalent and coordinate are formed when sharing of electrons takes place between two atoms. Therefore after the formation of bond, both types of bonding seem to be identical but the key difference is that in covalent bond, mutual sharing of electrons takes place between atoms whereas in coordinate bond, one atom acts as a donor and donates both of its electrons.
Complete answer:
Water: In the molecule, an oxygen atom is covalently bonded to two hydrogen atoms forming a bent shape structure. The structure of water molecule is as follows:
![seo images](https://www.vedantu.com/question-sets/92092628-b65e-4648-93ff-35c992a2f19b5660592022499867835.png)
Ammonia: In the molecule, the nitrogen atom is covalently bonded to the three hydrogen atoms forming a tetrahedral structure. The structure of ammonia is drawn as follows:
![seo images](https://www.vedantu.com/question-sets/2d9b0cfd-f67f-4347-83e7-992568b076ce5872877339836916146.png)
Ammonium ion: In this ion, the fourth hydrogen atom is attached to the nitrogen atom via coordinate bond because the valency of nitrogen is completed but it still has a lone pair to donate to the hydrogen nucleus. Although the representation of bonds is done differently, they are almost similar to the covalent bonds. The structure of ammonium ion is as follows:
![seo images](https://www.vedantu.com/question-sets/51ea4a53-0471-4442-8423-379547280a024928135658662431950.png)
Ethylene: It is an unsaturated hydrocarbon consisting of two carbon atoms covalently bonded to each via triple bond and two hydrogen atoms are attached via single bond. The structure of ethylene is represented as follows:
\(HC \equiv CH\)
Hence, the compound which contains covalent coordinate bonds is ammonium ion.
Thus, option (C) is the correct answer.
Note:
Both covalent and coordinate are formed when sharing of electrons takes place between two atoms. Therefore after the formation of bond, both types of bonding seem to be identical but the key difference is that in covalent bond, mutual sharing of electrons takes place between atoms whereas in coordinate bond, one atom acts as a donor and donates both of its electrons.
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