A. Coordinate bond
A.
B. Ionic bond
B.
C. Metallic bond
C.
D. None of these
D.
Correct Answer: C
সঠিক উত্তর: C
Explanation
ব্যাখ্যা
When ammonia (NH₃) combines with a hydrogen ion (H⁺), the nitrogen atom in ammonia donates a lone pair of electrons to the hydrogen ion, forming a new bond called a coordinate covalent bond. This results in the formation of the ammonium ion (NH₄⁺).