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

A 1:1 mixture (by weight) of hydrogen and helium is enclosed in a one liter flask kept at $0^{\circ}C$. Assuming ideal behavior, the partial pressure of helium is found to be 0.42 atm. Then the concentration of hydrogen would be

0.0375 M
0.028 M
0.0562 M
0.0187 M

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Multiple choice

$2$M of $100$ml of $Na_2SO_4$ is mixed with $3$M of $100$ml $NaCl$ solution and $1$M of $200$ml $CaCl_2$ solution. Then the ratio of the concentration of cation and anion.

$1/2$
$2$
$1.5$
$1$

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Multiple choice

Equal volumes of $0.1M$ $AgNO_3$ and $0.2M$ $NaCl$ are mixed. The concentration of $NO_3{^-}$ ion in the mixture will be:

$0.1M$
$0.05M$
$0.2M$
$0.15M$

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Multiple choice

$0.2 g$ of fine animal charcoal is mixed with half litre of acetic acid $(2M)$ solution and shaken for $30$ minutes?

Concentration remains same
Concentration increases
Concentration of the solution decreases
None of above

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Multiple choice

20 ml of 0.2 M ${ Al}{ 2 }{ \left( { SO }{ 4 } \right) }{ 3 }$ is mixed with 20 ml of 6.6 M $Ba{ Cl }{ 2 }$, the concentration of ${ Cl}^{ - }$ in solution is:

0.2 M
6.6 M
0.02 M
0.06 M

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Multiple choice

Two liquids X and Y form an ideal solution. The mixture has a vapour pressure of 400mm at 300K, when mixed in the molar ratio of 1:1 and a vapour pressure of 350mm when mixed in the molar ratio of 1:2 at the same temperature. The vapour pressures of the two pure liquids X and Y respectively are?

250mm, 550mm
350mm, 450mm
350mm, 700mm
550mm, 250mm

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Multiple choice

The vapour pressure of water at $20$ is 17.5 mm Hg. If 18 g of glucose ${ C }{ 6 }{ H }{ 12 }{ O }_{ 6 }$ is added to 178.2 g water $20$ , the vapour pressure of the resulting solution will be:

17.675 mm Hg
15.750 mm Hg
16.500 mm Hg
17.325 mm Hg

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Multiple choice

In which ration of volume 0.4 M $HCI$ and 0.9 M $HCI$ are to be mixed such that the concentration of the resultant solution becomes 0.7 M?

4:9
2:3
3:2
1:1

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Multiple choice

Osmotic pressure of $30\%$ solution of glucose is $1.20$ atm and that of $3.42\%$ solution of cane sugar is $2.5$atm. The osmotic pressure of the mixture containing equal volumes of the two solutions will be:

$2.5$atm
$3.7$atm
$1.85$atm
$1.3$atm

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Multiple choice

Two non-reactive gases A and B are present in a container with partial pressures 200 and 180 mm of Hg .When a third non-reactive gas C is added then total pressure becomes 1 atm then mole fraction of C will be :

0.75
0.5
0.25
cannot be calculated

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Multiple choice

Total vapour pressure of mixture of $1$ mol X( $P^o{_X} =150\ torr)$ and 2 mol $Y$ ($P^0{_Y}= 300 torr$) is $240$ torr. In this case:

there is a negative deviation from Raoult's law
there is positive deviation from Raoult's law
there is no deviation from Rault's law
cannot be decided

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Multiple choice

When the mixture of two immicible liquids (water and nitrobenzene) boils at 372 K and the vapour pressure at this temperature are $97.7 kPa (H_{2}O $and $3.6 kPa$ $(C_{6} H_{5}NO_2]). $Calculate the weight per of nitrobezene in the vapour.

$10.55$
$20.11$
$30.84$
$61.68$

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Multiple choice

The vapour pressure of two volatile liquid mixtures is $p_t =5.3+2x_B$ (in mm of Hg), where $X_B$ is mole fraction of B in mixture. What is the ratio of mole functions of A & B in liquid phase ( $P_A and P_B$ are vapour pressures of A&B)

$\frac { 73 }{ 53 }$
$\frac { 73 }{ 53 } \times \frac { P_{ A } }{ { P }_{ B } }$
$\frac { 53 }{ 73 }$
$\frac { 53 }{ 73 } \times \frac { P_{ A } }{ { P }_{ B } }$

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Multiple choice

A solution contains 20 g of salt in 500 ml of solution. Calculate the concentration in terms of mass by volume percentage.

0
20
1
4

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Multiple choice

Two solutions of glucose have osmotic pressures 1.5 and 2.5 atm. 1 litre of first solution is mixed with 2 litre of second solution. The osmotic pressure of the resultant solution will be:

1.62 atm
6.12 atm
1.26 atm
2.16 atm

Reveal answer Fill a bubble to check yourself

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