# Solution Test 6

Total Questions:50 Total Time: 75 Min

Remaining:

## Questions 1 of 50

Question:The normality of $$0.3M$$ phosphorus acid $$({H_3}P{O_3})$$ is

0.1

0.9

0.3

0.6

## Questions 2 of 50

Question:Which of the following has maximum number of molecules

16 gm of $${O_2}$$

16 gm of $$N{O_2}$$

7 gm of $${N_2}$$

2 gm of $${H_2}$$

## Questions 3 of 50

Question:Which statement is true for solution of 0.020 M $${H_2}S{O_4}$$

2 litre of the solution contains 0.020 mole of $$SO_4^{2 - }$$

2 litre of the solution contains 0.080 mole of $${H_3}{O^ + }$$

1 litre of the solution contains 0.020 mole $${H_3}{O^ + }$$

None of these

## Questions 4 of 50

Question:10 litre solution of urea contains 240g urea. The active mass of urea will be

0.04

0.02

0.4

0.2

## Questions 5 of 50

Question:The normality of a solution of sodium hydroxide 100 ml of which contains 4 grams of $$NaOH$$ is

0.1

40

1

0.4

## Questions 6 of 50

Question:Two solutions of a substance (non electrolyte) are mixed in the following manner 480 ml of 1.5M first solution + 520 mL of 1.2M second solution. What is the molarity of the final mixture

1.20 M

1.50 M

1.344 M

2.70 M

## Questions 7 of 50

Question:Mole fraction $$(X)$$ of any solution is equal to

$$\frac{{{\rm{No}}{\rm{. of moles of solute}}}}{{{\rm{Volume of solution in litre}}}}$$

$$\frac{{{\rm{No}}{\rm{. of gram equivalent of solute}}}}{{{\rm{Volume of solution in litre}}}}$$

$$\frac{{{\rm{No}}{\rm{. of moles of solute}}}}{{{\rm{Mass of solvent in kg}}}}$$

$$\frac{{{\rm{No}}{\rm{. of moles of any constituent}}}}{{{\rm{Total no}}{\rm{. of moles of all constituents}}}}$$

## Questions 8 of 50

Question:When $${W_B}gm$$ solute (molecular mass $${M_B}$$) dissolves in $${W_A}gm$$ solvent. The molality $$M$$ of the solution is

$$\frac{{{W_B}}}{{{W_A}}} \times \frac{{{M_B}}}{{1000}}$$

$$\frac{{{W_B}}}{{{M_B}}} \times \frac{{1000}}{{{W_A}}}$$

$$\frac{{{W_A}}}{{{W_B}}} \times \frac{{1000}}{{{M_B}}}$$

$$\frac{{{W_A} \times {M_B}}}{{{W_B} \times 1000}}$$

## Questions 9 of 50

Question:1.0 gm of pure calcium carbonate was found to require 50 ml of dilute $$HCl$$for complete reaction. The strength of the $$HCl$$ solution is given by

4 N

2 N

0.4 N

0.2 N

## Questions 10 of 50

Question:Molecular weight of glucose is 180. A solution of glucose which contains 18 gms per litre is

2 molal

1 molal

0.1 molal

18 molal

## Questions 11 of 50

Question:The concentration of an aqueous solution of $$0.01M\,C{H_3}OH$$ solution is very nearly equal to which of the following

$$0.01\% \,C{H_3}OH$$

$$0.01m\,C{H_3}OH$$

$${x_{C{H_3}OH}} = 0.01$$

$$0.99M\,{H_2}O$$

$$0.01N\,C{H_3}OH$$

## Questions 12 of 50

Question:When $$1.80gm$$ glucose dissolve in $$90\,gm$$ of $${H_2}O$$, the mole fraction of glucose is

0.00399

0.00199

0.0199

0.998

## Questions 13 of 50

Question:The normality of 10% (weight/volume) acetic acid is

1 N

10 N

1.7 N

0.83 N

## Questions 14 of 50

Question:Unit of mole fraction is

Moles/litre

Moles/litre$$^{\rm{2}}$$

Moles–litre

Dimensionless

## Questions 15 of 50

Question:If 0.50 mol of $$CaC{l_2}$$ is mixed with 0.20 mol of $$N{a_3}P{O_4}$$ , the maximum number of moles of $$C{a_3}{(P{O_4})_2}$$ which can be formed, is

0.7

0.5

0.2

0.1

## Questions 16 of 50

Question:An $$X$$ molal solution of a compound in benzene has mole fraction of solute equal to 0.2. The value of $$X$$ is

14

3.2

4

2

## Questions 17 of 50

Question:The amount of $$NaOH$$ in gms in $$250\,c{m^3}$$ of a $$0.100\,M\,NaOH$$ solution would be

4 gm

2 gm

1 gm

2.5 gm

## Questions 18 of 50

Question:4.0 gm of $$NaOH$$ are contained in one decilitre of solution. Its molarity would be

4 M

2 M

1 M

1.5 M

## Questions 19 of 50

Question:Which is not a colligative property

Refractive index

Lowering of vapour pressure

Depression of freezing point

Elevation of boiling point

## Questions 20 of 50

Question:Which of the following is a colligative property

Surface tension

Viscosity

Osmotic pressure

Optical rotation

## Questions 21 of 50

Question:Solvent molecules and the total number of ions of the solute$$5c{m^3}$$ of acetone is added to $$100\,c{m^3}$$ of water, the vapour pressure of water over the solution

It will be equal to the vapour pressure of pure water

It will be less than the vapour pressure of pure water

It will be greater than the vapour pressure of pure water

It will be very large

## Questions 22 of 50

Question:At 300 K, when a solute is added to a solvent its vapour pressure over the mercury reduces from 50 mm to 45 mm. The value of mole fraction of solute will be

0.005

0.01

0.1

0.9

## Questions 23 of 50

Question:An ideal solution was obtained by mixing methanol and ethanol. If the partial vapour pressure of methanol and ethanol are $$2.619\,kPa$$ and $$4.556\,kPa$$ respectively, the composition of the vapour (in terms of mole fraction) will be

0.635 methanol, 0.365 ethanol

0.365 methanol, 0.635 ethanol

0.574 methanol, 0.326 ethanol

0.173 methanol, 0.827 ethanol

## Questions 24 of 50

Question:The vapour pressure of two liquids P and Q are 80 and 600 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be

140 torr

20 torr

68 torr

72 torr

## Questions 25 of 50

Question:Which of the following liquid pairs shows a positive deviation from Raoult's law

Water-nitric acid

Benzene-methanol

Water-hydrochloric acid

Acetone-chloroform

## Questions 26 of 50

Question:Which one of the following is non-ideal solution

Benzene + toluene

$$n$$-hexane + $$n$$-heptane

Ethyl bromide + ethyl iodide

$$CC{l_4} + CHC{l_3}$$

## Questions 27 of 50

Question:Identify the mixture that shows positive deviation from Raoult's law

$$CHC{l_3} + {(C{H_3})_2}CO$$

$${(C{H_3})_2}CO + {C_6}{H_5}N{H_2}$$

$$CHC{l_3} + {C_6}{H_6}$$

$${(C{H_3})_2}CO + C{S_2}$$

$${C_6}{H_5}N + C{H_3}COOH$$

## Questions 28 of 50

Question:When acetone is added to chloroform, then hydrogen bond is formed between them.These liquids show

Positive deviation from Raoult's law

Negative deviation from Raoult's law

No deviation from Raoult's law

Volume is slightly increased

## Questions 29 of 50

Question:A liquid mixture boils without changing constituent is called

Stable structure complex

Binary liquid mixture

Zeotropic liquid mixture

Azeotropic liquid mixture

## Questions 30 of 50

Question:Azeotropic mixture are

Constant temperature boiling mixtures

Those which boils at different temperatures

Mixture of two solids

None of the above

## Questions 31 of 50

Question:A solution of sucrose(molar mass = 342 g/mol) is prepared by dissolving 68.4 g of it per litre of the solution, what is its osmotic pressure (R = 0.082 lit. atm.$${k^{ - 1}}$$$$mo{l^{ - 1}}$$) at 273k

6.02 atm

4.92 atm

4.04 atm

5.32 atm

## Questions 32 of 50

Question:Blood has been found to be isotonic with

Normal saline solution

Saturated $$NaCl$$solution

Saturated $$KCl$$ solution

Saturated solution of a 1 : 1 mixture of $$NaCl$$ and $$KCl$$

## Questions 33 of 50

Question:Isotonic solution have the same

Density

Molar concentration

Normality

None of these

## Questions 34 of 50

Question:A 0.6% solution of urea (molecular weight = 60) would be isotonic with

$$0.1M$$ glucose

$$0.1M\,KCl$$

0.6% glucose solution

$$0.6\% \,\,KCl$$ solution

## Questions 35 of 50

Question:The osmotic pressure of a dilute solution of a non-volatile solute is

Directly proportional to its temperature on the centigrade scale

Inversely proportional to its temperature on the Kelvin scale

Directly proportional to its temperature on the Kelvin scale

Inversely proportional to its temperature on the centigrade scale

## Questions 36 of 50

Question:Osmotic pressure of a urea solution at $${10^o}C$$ is $$500\,\,mm.$$ Osmotic pressure of the solution become 105.3 mm. When it is diluted and temperature raised to $${25^o}C.$$ The extent of dilution is

6 Times

5 Times

7 Times

4 Times

## Questions 37 of 50

Question:The latent heat of vapourisation of water is $$9700\,Cal/mole$$ and if the b.p. is $${100^o}C$$, ebullioscopic constant of water is

$${0.513^o}C$$

$${1.026^o}C$$

$${10.26^o}C$$

$${1.832^o}C$$

## Questions 38 of 50

Question:The molal elevation constant of water $$= {0.52^o}C$$. The boiling point of 1.0 molal aqueous $$KCl$$ solution (assuming complete dissociation of $$KCl$$), therefore, should be

$${100.52^o}C$$

$${101.04^o}C$$

$${99.48^o}C$$

$${98.96^o}C$$

## Questions 39 of 50

Question:An aqueous solution containing 1g of urea boils at $${100.25^o}C$$. The aqueous solution containing 3 g of glucose in the same volume will boil at (Molecular weight of urea and glucose are 60 and 180 respectively)

$${100.75^o}C$$

$${100.5^o}C$$

$${100.25^o}C$$

$${100^o}C$$

## Questions 40 of 50

Question:When common salt is dissolved in water

Melting point of the solution increases

Boiling point of the solution increases

Boiling point of the solution decreases

Both melting point and boiling point decreases

## Questions 41 of 50

Question:A solution of urea (mol. mass 56g mol$$^{ - 1}$$) boils at 100.18$$^0$$ C at the atmospheric pressure. If $${K_f}$$ and $${K_b}$$for water are 1.86 and 0.512K kg mol$$^{ - 1}$$ respectively the above solution will freeze at

6.54$$^0$$C

6.54$$^0$$C

0.654$$^0$$C

0.654$$^0$$C

## Questions 42 of 50

Question:The molar freezing point constant for water is $${1.86^o}C\,mol{e^{ - 1}}$$. If 342 gm of canesugar $$({C_{12}}{H_{22}}{O_{11}})$$ are dissolved in 1000 $$gm$$ of water, the solution will freeze at

$$- {1.86^o}C$$

$${1.86^o}C$$

$$- {3.92^o}C$$

$${2.42^o}C$$

## Questions 43 of 50

Question:In the depression of freezing point experiment, it is found that the

Vapour pressure of the solution is less than that of pure solvent

Vapour pressure of the solution is more than that of pure solvent

Only solute molecules solidify at the freezing point

Only solvent molecules solidify at the freezing point

1 and 4 are correct

## Questions 44 of 50

Question:Calculate the molal depression constant of a solvent which has freezing point $${16.6^o}C$$ and latent heat of fusion $$180.75\,J{g^{ - 1}}$$

2.68

3.86

4.68

2.86t6

## Questions 45 of 50

Question:Which of the following aqueous solutions containing 10 gm of solute in each case has highest B.P.

$$NaCl$$solution

$$KCl$$ solution

Sugar solution

Glucose solution

## Questions 46 of 50

Question:0.01 molar solutions of glucose, phenol and potassium chloride were prepared in water. The boiling points of

Glucose solution = Phenol solution = Potassium chloride solution

Potassium chloride solution > Glucose solution > Phenol solution

Phenol solution > Potassium chloride solution > Glucose solution

Potassium chloride solution > Phenol solution > Glucose solution

## Questions 47 of 50

Question:Which of the following salt has the same value of Van't Hoff factor $$i$$ as that of $${K_3}[Fe{(CN)_6}]$$

$$A{l_2}{(S{O_4})_3}$$

$$NaCl$$

$$N{a_2}S{O_4}$$

$$Al{(N{O_3})_3}$$

## Questions 48 of 50

Question:When benzoic acid dissolve in benzene, the observed molecular mass is

244

61

366

122

## Questions 49 of 50

Question:The Van't Hoff factor for sodium phosphate would be

1

2

3

4

## Questions 50 of 50

Question:The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to