Mixtures and Alligation

"109% of ${H_2}S{O_4}$" labeled oleum sample is mixed with"118% of ${H_2}S{O_4}$ labeled oleum sample then mas%of"free$S{O_3}$" in resulting mixture will be

A volume of $50\ ml$ of $'20\ vol'\ H_2O_2$ solution is mixed with $50\ ml$ of $'10\ vol' \ H_2O_2$ solution. The volume strength of resulting solution is (assume neither expansion nor contraction in volume of solution, on mixing)

In what ratio should a $80\%$ (mass/volume) solution of ${H}{2}S{O}{4}$ be mixed to $20\%$ (mass/volume) of ${H}{2}S{O}{4}$ to produce $40\%$ (mass/volume) ${H}{2}S{O}{4}$ solution?

One litre of water is added to $5$ litres of a $30$% solution of alcohol in water. The strength of alcohol in the new solution will be:

There are three samples of $H_{2}O_{2}$ labelled as $10\ vol.; 15\ vol.; 20\ vol.$ Half litre of each sample are mixed and then diluted with equal volume of water. Calculate volume strength of the resultant solution.

A synthetic mixture of nitrogen and Argon has a density of $1.4 g L^{-1}$ at $0^oC$. Find out the volume percentage of nitrogen in the mixture?

Find the volume strength of $H_2O_2$ solution prepared by mixing of $250$ mL of $3N \,H_2O_2$ & 750 mL of 1N $H_2O_2$ solution.

What is the difference in mass (in grams) of Nitric acid and water, if their mass ratio is $3:8$ in total of $330$ grams of acidic solution mixture?

A man buys milk at $50\ P$. a litre and after adding water sells it at $60\ P$. a litre thereby making a profit of $33\dfrac {1}{3}$ p.c. Find the proportion of water he has added

One vessel contains a mixture of $18$ litres of brandy and $7$ litres of water; and another contains $20$ litres of brandy with $12$ litres of water. Compare the strengths of the two mixtures

How much water must be added to $14$ kilolitres of milk worth $54$ P. a litre so that the value of the mixture may be $42$ P. a litre?

Choose the correct answer from the alternatives given. A container has $80$ L of milk. From this container $8$ L of milk was taken out and replaced by water. The process was further repeated twice. The value of milk in the container after that is

$640ml$ of a mixture contains milk and water in ratio $6:2$. How much of the water is to be added to get a new mixture containing half milk and half water?