What is $X$ in the following reaction?
$MgCl_2 + 2H_2O \to X + 2HCl + H_2O$

In the charring process, concentrated sulfuric acid reacts with sugar to give sugar charcoal. What is the role of conc. $H_2SO_4$ in this reaction?

The temperatures of maximum density in $H_2O$ and $D_2O$ respectively are:

The temporary hardness of a water sample is due to compound $X$. Boiling this sample converts $X$ to compound $Y$. $X$ and $Y$,respectively,are

Which of the following is a bad conductor of electricity?

Provide general information about water $(H_2O)$.