When ammonia and hydrogen ion bond together to form ammonium ion, the bond formed is called
- A. Electrovalent bond
- B. Co-ordinate bond
- C. Ionic bond
- D. Covalent bond
When ammonia bonds with hydrogen ion, ammonium ion complex with a positive charge will be formed after the hydrogen ion alone contributes the shared electron.
Now co-ordinate bonds are a special kind of covalent bond in which the shared electron is contributed by only one of the participants.
Now for the right answer to the above question:
- Option A is incorrect. in electrovalent bond, there is no sharing of electrons, instead, there is a total transfer from one participant to the other.
- Option B is correct. Only the hydrogen ion contributes the extra electron being shared to for the ammonium complex.
- C is incorrect. ionic bond is the same as electrovalent bond, technically speaking, one question is expected not to feature two answers.
- D is not the correct answer. In ordinary covalent bond, all the participants contribute electrons for share.
You may please note these/this:
- Co-ordinate bond (also called dative bond) is a type of covalent bond in which only one of the bonding party contributes the electron(s) to be shared.
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/culled from 2019 JAMB-UTME Chemistry question 21/