Hardness of water is due to the presence of salts of
- A$Na^{+}$ and $K^{+}$
- B$Ca^{2+}$ and $Mg^{2+}$
- C$Ca^{2+}$ and $K^{+}$
- D$Ca^{2+}$ and $Na^{+}$
Explore More
Similar Questions
Which of the following is not true about the $H_2O$ molecule?
Difficult
View SolutionWater is often treated with chlorine,because it
Easy
View SolutionWhat is $X$ in the following reaction?
$MgCl_2 + 2H_2O \to X + 2HCl + H_2O$
$MgCl_2 + 2H_2O \to X + 2HCl + H_2O$
Medium
View SolutionAmongst the following,the form of water with the lowest ionic conductance at $298 \ K$ is
Consider the following statements regarding heavy water $(D_2O)$. Which of the following statements is/are correct?
$(A)$ Heavy water is used as a moderator in nuclear reactors.
$(B)$ The power of association is higher in $D_2O$ than in ordinary water $(H_2O)$.
$(C)$ Heavy water is more effective as a solvent than ordinary water.
$(A)$ Heavy water is used as a moderator in nuclear reactors.
$(B)$ The power of association is higher in $D_2O$ than in ordinary water $(H_2O)$.
$(C)$ Heavy water is more effective as a solvent than ordinary water.
Medium
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo