More than $70\%$ of the world's freshwater is contained in:

The correct order of increasing $s-$character (in percentage) in the hybrid orbitals of the following molecules/ions is:
$(I)$ $CO_3^{2-}$ $(II)$ $XeF_4$ $(III)$ $I_3^-$ $(IV)$ $NCl_3$ $(V)$ $BeCl_2$

The function $f(x) = |px - q| + r|x|,$ $x \in ( - \infty, \infty )$ where $p > 0, q > 0, r > 0$ assumes its minimum value only at one point if

$A$ particle executes simple harmonic oscillation with an amplitude $a$. The period of oscillation is $T$. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

Chlorine atom,in its third excited state,reacts with fluorine to form a compound $X$. The formula and shape of $X$ are :

The most abundant prokaryotes helpful to humans in making curd from milk and in production of antibiotics are categorised as