Which gland is concerned with salt equilibrium in the body?

The variance of the first $50$ even natural numbers is

One and a half mole of oxygen combine with aluminium to form $Al_2O_3$,then the weight of aluminium metal used in this reaction is ............. $g$ (Atomic weight of $Al = 27$)

If a complex number $z$ satisfies $|z^2-1|=|z|^2+1$,then $z$ lies on

How many $mL$ of perhydrol is required to produce sufficient oxygen which can be used to completely convert $2 \ L$ of $SO_2$ gas to $SO_3$ gas (in $mL$)?

Which of the following is the strongest conjugate base?