B.A./B.COM. LL.B. (5 YEAR LAW / U.G. LAW) Panjab University Entrance Exam 2022 : MCQs and Answer Key

Practice Mode:
65.

Which of the following ions are responsible for hardness of water ?

A: Sodium and Magnesium ions
B: Sodium and Calcium ions
C: Potassium and Calcium ions
D: Calcium and Magnesium ions

The answer is: D