MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
What kind of compound is MgH₂?
Think it through first, then pick an option.
- a Volatile
- b Ionic
- c Covalent
- d Organic
Answer and explanation
Correct answer: b Ionic
The metal Mg gives two electrons to two H: Mg²⁺ and H⁻, so it is ionic.
Why the other options are wrong
- a Volatile: Volatile means it evaporates easily; ionic compounds have high melting points, so this is not volatile.
- c Covalent: It would be covalent with two nonmetals; here Mg is a metal and H takes electrons (as in NaH).
- d Organic: Organic compounds are not this chapter's topic; MgH₂ is an ionic compound of a metal and H.
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