Quantitative Aptitude

Mixtures and Alligation

1,816 Questions

All Direct removal and addition 448 Alligation cross rule 270 Ratios, quantities, and percentages 233 Weighted mean and concentration 195 Equal quantity replacement 189 Three or more components 174 Repeated equal-volume replacement 154 Profit-based alligation 153

Mixtures and Alligation Questions

Multiple choice

10 ml mixture of $CO, CH_{4}$ and $N_{2}$, exploded with an excess of oxygen, gave a contraction of 6.5 ml. There was a further contraction of 7ml when the residual gas was treated with $KOH$. Volume of $CO, CH_{4}$ and $N_{2}$ respectively, is :

5ml, 2ml, 3ml
2ml, 6ml, 4ml
1ml, 8ml, 9ml
4ml, 3ml, 5ml

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Multiple choice

A $20.0 cm^{2}$ mixture of $CO, CH_{4}$ and He gases is exploded by an electric discharge at room temperature with excess of oxygen. The volume contraction is found to be $13.0cm^{3}$. A further contraction of $14.0 cm^{3}$ occurs when the residual gas is treated with KOH solution. Find out the volume percentage of CO in gaseous mixture.

25%
50%
20%
37.5%

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Multiple choice

When 100 ml of a $O_{2} - O_{3}$ mixture was passed through turpentine, there was the reduction of volume by 20 ml. If 100ml of such a mixture is heated, what will be the increase in volume?

$10\ ml$
$20\ ml$
$30\ ml$
$25\ ml$

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Multiple choice

60ml of a mixture of nitrous oxide and nitric oxide was exploded with excess of hydrogen. If 38ml of $N_{2}$ was formed, calculate the volume of each gas in the mixture.

$\displaystyle \:NO= 44ml; N_{2}O= 16ml$
$\displaystyle \:NO= 45ml; N_{2}O= 20ml$
$\displaystyle \:NO= 34ml; N_{2}O= 22ml$
$\displaystyle \:NO= 20ml; N_{2}O= 26ml$

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Multiple choice

200 ml of a gaseous mixture containing $\displaystyle :CO, CO_{2}$ and $N_{2}$ on complete combustion in just sufficient amount of $O_{2}$ showed contraction of 40 ml. When the resulting gases were passed through KOH solution it reduces by 50% then calculate the volume ratio of $\displaystyle :V_{co_{2}}:V_{co}:V_{N_{2}}$ in orginial mixture.

4 : 1: 5
2 : 3: 5
1 : 4: 5
1 : 3: 5

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Multiple choice

The % by volume of $\displaystyle :C_{4}H_{10}$ in a gaseous mixture of $\displaystyle :C_{4}H_{10},$ and CO is 40. When 200 ml of the mixture is burnt in excess $\displaystyle :O_{2}.$ Find volume(in ml) of $\displaystyle :CO_{2}$ produced.

220
340
440
560

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Multiple choice

10 ml of a compound containing 'N' and 'O' is mixed with 30 ml of $H_{2}$ to produce $H_{2}O$ (l) and 10 ml of $N_{2}$(g). Molecular formula of compound if both reactants reacts completely, is:

$\displaystyle \:N_{2}O$
$\displaystyle \:NO_{2}$
$\displaystyle \:N_{2}O_{3}$
$\displaystyle \:N_{2}O_{5}$

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Multiple choice

A mixture of $NH_{4}NO_{3}$ and $(NH_{4}){2}HPO{4}$ contains $30.40 \%$ mass percent of nitrogen. What is the mass ratio of the two components in the mixture?

$2:1$
$1:2$
$3:4$
$4:1$

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Multiple choice

A gas mixture of $3$ litres of propane $(C_{3}H_{8})$ and butane $(C_{4}H_{10})$ on complete combustion at $250^{0}C$ produced $10$ litres of $CO_{2}$. Find out the composition of the gas mixture (Propane: Butane).

$2:1$
$1: 2$
$1.5:1.5$
$0.5: 2.5$

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Multiple choice

A mixture of ethylene and excess of $H_2$ had a pressure of $600$ mm of Hg. The mixture was passed over nickel catalyst to convert ethylene to ethane. The pressure of the resultant mixture at the similar conditions of temperature and volume dropped to $400$ mm of Hg. The fraction of $C_2H_4$ by volume in the original mixture is :

$\dfrac{1}{3}$rd of the total volume
$\dfrac{1}{4}$th of the total volume
$\dfrac{2}{3}$rd of the total volume
$\dfrac{1}{2}$nd of the total volume

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Multiple choice

A mixture of $CuSO_4.5H_2O$ and $MgSO_4.7H_2O$ was heated until all the water was driven off. If $5.0$ g of mixture gave $3$ g of anhydrous salt, what was the percentage by mass of $CuSO_4.5H_2O$ in the original mixture?

$74.4$
$70$
$80$
$90$

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Multiple choice

If LPG cylinder contains a mixture of butane and isobutane, then the amount of oxygen that would be required for combustion of $1$ kg of it will be:

$1.8$ kg
$2.7$ kg
$4.5$ kg
$3.58$ kg

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Multiple choice

The ratio of active masses of $22$g $C{O}{2}$, $3g$ ${H}{2}$ and $7g$ ${N}_{2}$ in a gaseous mixture:-

$22:3:7$
$0.5:3:7$
$1:3:1$
$1:3:0.5$

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Multiple choice

A mixture of ethane $(C_{2}H_{6})$ and ethene $(C_{2}H_{4})$ occupies $40 L$ at $1.00$ atm and $400 K$. The mixture reacts completely with $130 g$ of $O_{2}$ to produce $CO_{2}$ and $H_{2}O$. Assuming ideal gas behaviour, mole fractions of $C_{2}H_{4}$ and $C_{2}H_{6}$ in the mixture will be :

$x_{C_{2}H_{6}}=0.3293$, $x_{C_{2}H_{4}}=0.6707$,
$x_{C_{2}H_{6}}=0.6707$, $x_{C_{2}H_{4}}=0.3293$,
$x_{C_{2}H_{6}}=0.5$, $x_{C_{2}H_{4}}=0.5$,
none of these

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Multiple choice

Equal masses of methane and oxygen are mixed in an empty container at ${25}^{o}C$. The fraction of total pressure exerted by oxygen is:

$1/3$
$1/2$
$2/3$
$\cfrac{1}{3}\times \cfrac{273}{308}$

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