Post-UTME Chemistry 2019 Objective — Question 16
Question 16 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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The following compounds are alkalis EXCEPT
- A. Ca(OH)2
- B. Mg(OH)2Correct
- C. NaOH
- D. KOH
Explanation
Mg(OH)2 is only sparingly soluble in water and is not classified as an alkali (a soluble base), unlike Ca(OH)2, NaOH and KOH.
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