MCQ practice · SSC Chemistry Board questions · Chapter 9: Acid-Base Balance
Which one is acidic?
Think it through first, then pick an option.
- a SiO₂
- b Al(OH)₃
- c Mg(OH)₂
- d MgO
Answer and explanation
Correct answer: a SiO₂
SiO₂ is a non-metal oxide, and non-metal oxides are acidic.
Why the other options are wrong
- b Al(OH)₃: Al(OH)₃ is a metal hydroxide, so it is a base.
- c Mg(OH)₂: Mg(OH)₂ is basic; it is the base in antacid.
- d MgO: MgO is a metal oxide, and metal oxides are basic.
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