Mixtures and Alligation

A mixture of potassium carbonate and calcium carbonate is subjected to decomposition. The percentage loss in weight was 11%. Find out the ratio of the amount of potassium carbonate to calcium carbonate in the mixture.

A mixture of aluminium and zinc weighing 1.67 grams was completely dissolved in acid and 1.69 litres of hydrogen gas was evolved. The hydrogen gas was measured at STP conditions. What was the mass percent of aluminium in original mixture?

The volume of $0.2\ N$ $H_{2}SO_{4}$ mixed with $0.5\ N\ KOH$ (remaining volume) to prepare $150\ cm^{3}$ of $0.2\ N\ KOH$ solution is:

A mixture of $H_2$ and $O_2$ in $2:1$ volume is allowed to diffuse through a porous partition. What is the composition of gas coming out initially?

A mixture of formic acid and oxalic acid is heated with concentrated ${H}{2}{SO}{4}$. The gaseous product is passed into $KOH$ solution where the volume decreases by 1/6th. The molecular proportion of the organic acids, formic acids and oxalic acid in the mixture is ___.

Gases are effusing out through a pin hole of a container containing gas mixture of $H_2$, He and $CH_4$. What should be the composition of the gas mixture, so that in the initial form, gas mixture effused out will have equal compositions for all gases?

A 3 : 2 molar mixture of $N_2$, and CO is present in a vessel at 500 bar pressure. Due to hole in the vessel, the gas mixture leaks out. The composition of mixture effusing out initially is :

The ratio of rate of diffusion of gases $A$ and $B$ is $1 : 4$. If the ratio of their masses present in the mixture is $2 : 3$, what is the ratio of their mole fraction?

A mixture of hydrogen and oxygen in 3 : 1 volume ratio is allowed to diffuse through a porous partition .What should be the composition of the initial gas diffusing out the vessel ?

Four 1-1 liter flasks are separately filled with the gases $N_2, \, Ne,\, N_2O,$ and $SO_3$ at the same temperature pressure. The ratio of the total number of atoms of these gases present in a different flask would be ______.

The concentration of the same aqueous solution of glucose is determined by two students - Sawan and Gautam. Sawan reported the concentration as 20% (w/w) and Gautam reported the concentration as 25% (w/v). If both the concentration are correct, then the density of solution is _____________.

A mixture of $Ne$ and $Ar$ at $250$K has a total K.E. $=3$ KJ in a closed vessel, the total mass of $Ne$ and $Ar$ is $30$g. Find mass $\%$ of $Ne$ in the gaseous mixture at $250$K.