Hydrogen,by donating one electron,forms $H^+$. In this property,it resembles

Which of the following is the most important biological compound containing $Mg$ found in the living world?

State the reasons for the following:
$(a)$ Why is a solution of $Na_{2}CO_{3}$ alkaline?
$(b)$ Why are alkali metals prepared by the electrolysis of their fused chlorides?
$(c)$ Why is sodium found to be more useful than potassium in biological systems?

Hydrogen is not obtained when zinc reacts with

Assertion $(A)$: $K$, $Rb$, and $Cs$ form superoxides.
Reason $(R)$: The stability of the superoxides increases from $K$ to $Cs$ due to the decrease in lattice energy.
The correct answer is:

Which of the following is $NOT$ present in baking powder?