MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
The compound formed by Y and Z
- i. has a high melting point
- ii. is covalent
- iii. is insoluble in water
Think it through first, then pick an option.
- a i
- b i and ii
- c ii and iii
- d i and iii
Answer and explanation
Correct answer: a i
Y = Cl and Z = Mg: MgCl₂ is ionic, has a high melting point and dissolves in water.
Why the other options are wrong
- b i and ii: ii is false: MgCl₂ is ionic. The answer the book supports is i.
- c ii and iii: ii and iii are both false: MgCl₂ is ionic and dissolves in water.
- d i and iii: iii is false: ionic MgCl₂ dissolves in water.
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