JAMB Chemistry 2014 Objective — Question 12

Question 12 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2014 Objective paper, with the correct answer and a full explanation.

Ca(HCO₃)₂ and Mg(HCO₃)₂ are the major substances that are responsible for

A. permanent hardness
B. temporary hardnessCorrect
C. softness
D. alkalinity

Explanation

Ca(HCO3)2 and Mg(HCO3)2 are the major substances that are responsible for temporary hardness, while CaSO4 and MgSO4 are those responsible for permanent hardness.

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