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Chemical Bonding — Chemistry STD 10 — Question

ICSE BoardEnglish MediumSTD 10ChemistryChemical Bonding1 Mark
MCQ
Which of the following molecules contains a coordinate bond?
  • A
    Carbon dioxide $\left( CO _2\right)$
  • B
    Water $\left( H _2 O \right)$
  • ✓
    Ammonium ion $\left( NH _4^{+}\right)$
  • D
    Oxygen molecule $\left( O _2\right)$
✓

Answer

Correct option: C.
Ammonium ion $\left( NH _4^{+}\right)$
(c) Ammonium ion $\left( NH _4^{+}\right)$
Explanation : In the ammonium ion $\left( NH _4^{+}\right)$, one of the hydrogen atoms is bonded to the nitrogen through a coordinate bond. The nitrogen atom donates a lone pair of electrons to the hydrogen ion $\left( H ^{+}\right)$to form this bond, fulfilling the octet rule for nitrogen and the duplet rule for hydrogen.

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