During the electrolysis of cryolite,aluminium and fluorine are formed in ........ molar ratio :

$A$ homogeneous solid cylinder of length $L$ $(L < H/2)$,cross-sectional area $A/5$ is immersed such that it floats with its axis vertical at the liquid-liquid interface with length $L/4$ in the denser liquid as shown in the figure. The lower density liquid is open to the atmosphere having pressure $P_0$. Then,the density $D$ of the solid is given by:

In a pseudo first order hydrolysis of ester in water,the following results were obtained.

$t/s$	$0$	$30$	$60$	$90$
$Ester/mol\, L^{-1}$	$0.55$	$0.31$	$0.17$	$0.085$

What will be the average rate of reaction between the time interval $30$ to $60$ seconds?

The intensity of the electric field required to keep a water drop of radius $10^{-5} \, cm$ just suspended in air when charged with one electron is approximately:

In $DNA$,the two polynucleotide chains are ...

Which pair of the following belongs to Basidiomycetes?