question_answer 1)
Which one of the following units is useful in relating vapour pressure with the concentration of the solution?
A)
Mole fraction done
clear
B)
Mass by volume percentage done
clear
C)
Mass percentage done
clear
D)
Volume percentage done
clear
View Solution play_arrow
question_answer 2)
The law which indicates the relationship between solubility of a gas in liquid and pressure is
A)
Raoult's law done
clear
B)
Henry's law done
clear
C)
lowering of vapour pressure done
clear
D)
elevation of boiling point. done
clear
View Solution play_arrow
question_answer 3)
When acetone and chloroform are mixed together, which of the following observations is correct?
A)
A - A and B - B interactions are stronger than A - B interactions. done
clear
B)
A - A and B - B interactions are weaker than A - B interactions. done
clear
C)
A - A, B - B and A - B interactions are equal. done
clear
D)
The liquids form separate layers and are immiscible. done
clear
View Solution play_arrow
question_answer 4)
Study the figures given below and mark the correct statement.
A)
(i) Nitric acid + Water (ii) Acetone + Ethyl alcohol done
clear
B)
(i) Water + Ethyl alcohol (ii) Acetone + Benzene done
clear
C)
(i) Acetone + Ethyl alcohol (ii) Acetone + Chloroform done
clear
D)
(i) Benzene + Chloroform (ii) Acetone + Chloroform done
clear
View Solution play_arrow
question_answer 5)
3 moles of P and 2 moles of Q are mixed, what will be their total vapour pressure in the solution if their partial vapour pressures are 8 and 60 torr respectively?
A)
80 torr done
clear
B)
140 torr done
clear
C)
72 torr done
clear
D)
70 torr done
clear
View Solution play_arrow
question_answer 6)
Which of the following statements is not correct?
A)
5% aqueous solutions of NaCl and KCl are said to be isomolar. done
clear
B)
1 M sucrose solution and 1 M glucose solution are isotonic. done
clear
C)
Molecular mass of acetic acid and benzoic acid is higher than normal mass in cryoscopic methods. done
clear
D)
For the same solution, \[\frac{\Delta {{T}_{b}}}{\Delta {{T}_{f}}}=\frac{{{K}_{b}}}{{{K}_{f}}}\]. done
clear
View Solution play_arrow
question_answer 7)
10% solution of urea is isotonic with 6% solution of a non-volatile solute X. What is the molecular mass of solute X?
A)
\[6\text{ }g\text{ }mo{{l}^{-1}}\] done
clear
B)
\[60\text{ }g\text{ }mo{{l}^{-1}}\] done
clear
C)
\[36\text{ }g\text{ }mo{{l}^{-1}}\] done
clear
D)
\[32\text{ }g\text{ }mo{{l}^{-1}}\] done
clear
View Solution play_arrow
question_answer 8)
Match the column I with column II and mark the appropriate choice.
Column - I Column - II [a] \[\pi \] (i) \[\frac{w}{m}\times \frac{M}{W}\] [b] \[{{p}^{{}^\circ }}-{{p}_{s}}\] (ii) CRT [c] M (iii) Lowering in vapour pressure [d] n/N (iv) No. of gram moles of solute per kg solvent
A)
[A] \[\to \] (ii), [B] \[\to \] (iii), [C] \[\to \] (i), [D] \[\to \] (iv) done
clear
B)
[A] \[\to \] (ii), [B] \[\to \] (iii), [C] \[\to \] (iv), [D] \[\to \] (i) done
clear
C)
[A] \[\to \] (ii), [B] \[\to \] (i), [C] \[\to \] (iv), [D] \[\to \] (iii) done
clear
D)
[A] \[\to \] (iii), [B] \[\to \](ii), [C] \[\to \] (i), [D] \[\to \] (iv) done
clear
View Solution play_arrow
question_answer 9)
Two liquids \[HN{{O}_{3}}\] [A] and water [B] form a maximum boiling azeotrope when mixed in the ratio of 68% and 32% respectively. It means
A)
A - B interactions are stronger than A - A and B - B interactions done
clear
B)
A - B interactions are weaker than A - A and B - B interactions done
clear
C)
vapour pressure of solution is more than the pure components done
clear
D)
vapour pressure of solution is less since only one component vaporises. done
clear
View Solution play_arrow
question_answer 10)
The value of Henry's law constant for some gases at 293 K is given below. Arrange the gases in the increasing order of their solubility. He : 144.97 k bar, \[{{H}_{2}}:\text{ }69.16\text{ }k\,bar\], \[{{N}_{2}}:\text{ }76.48\text{ }k\,bar\], \[{{O}_{2}}:\text{ }34.86\text{ }k\,bar\]
A)
\[He<{{N}_{2}}<{{H}_{2}}<{{O}_{2}}\] done
clear
B)
\[{{O}_{2}}<{{H}_{2}}<{{N}_{2}}<He\] done
clear
C)
\[{{H}_{2}}<{{N}_{2}}<{{O}_{2}}<He\] done
clear
D)
\[He<{{O}_{2}}<{{N}_{2}}<{{H}_{2}}\] done
clear
View Solution play_arrow
question_answer 11)
In three beakers labelled as [A], [B] and [C], 100 mL of water, 100 mL of 1 M solution of glucose in water and 100 mL of 0.5 M solution of glucose in water are taken respectively and kept at same temperature. Which of the following statements is correct?
A)
Vapour pressure in all the three beakers is same. done
clear
B)
Vapour pressure of beaker B is highest. done
clear
C)
Vapour pressure of beaker C is highest. done
clear
D)
Vapour pressure of beaker B is lower than that of C and vapour pressure of beaker C is lower than that of A. done
clear
View Solution play_arrow
question_answer 12)
Sea water is desalinated to get fresh water by which of the following methods?
A)
When pressure more than osmotic pressure is applied pure water is squeezed out of sea water by reverse osmosis. done
clear
B)
When excess pressure is applied on sea water pure water moves in by osmosis. done
clear
C)
Water moves out from sea water due to osmosis. done
clear
D)
Salt is precipitated from sea water when kept undisturbed for sometime. done
clear
View Solution play_arrow
question_answer 13)
At high altitude the partial pressure of oxygen is less than that at the ground level. This leads to
A)
low concentration of oxygen in the blood and tissues done
clear
B)
high concentration of oxygen in the blood and tissues done
clear
C)
release of dissolved gases and formation of bubbles of nitrogen in the blood done
clear
D)
thickening of blood and tissues. done
clear
View Solution play_arrow
question_answer 14)
In the given graph, pq, qr and st represent
A)
pq\[\to \] liquid state of solution, qr\[\to \] solid state of solution, st\[\to \] liquid state of solvent done
clear
B)
pq\[\to \] liquid state of solvent, qr \[\to \] solid state of solvent, st\[\to \] liquid state of solution done
clear
C)
pq \[\to \]liquid state of solvent, qr \[\to \] solid state of solution, st \[\to \] liquid state of solution done
clear
D)
pq \[\to \]solid state of solvent, qr\[\to \] liquid state of solvent, st\[\to \] solid state of solution. done
clear
View Solution play_arrow
question_answer 15)
Match the column I with column II and mark the appropriate choice.
Column I Column II [a] \[{{K}_{b}}\] (i) \[mol\,k{{g}^{-1}}\] [b] M (ii) \[mol\,{{L}^{-1}}\] [c] M (iii) \[g\,{{L}^{-1}}\] [d] Strength (iv) \[K\,kg\,mo{{l}^{-1}}\]
A)
[A]\[\to \] (i), [B]\[\to \] (iii), [C]\[\to \] (ii), [D]\[\to \](iv) done
clear
B)
[A]\[\to \] (iv), [B]\[\to \](i), [C] \[\to \] (ii), [D]\[\to \](iii) done
clear
C)
[A]\[\to \] (ii), [B]\[\to \] (iv), [C] \[\to \] (iii), [D] \[\to \](i) done
clear
D)
[A] \[\to \] (iii), [B] \[\to \] (ii), [C] \[\to \] (i), [D] \[\to \] (iv) done
clear
View Solution play_arrow
question_answer 16)
Consider the two figures given below. Which of the following statements regarding the experiment is true?
A)
The solubility of a gas in liquid in beaker (i) is greater than that in beaker (ii). done
clear
B)
The solubility of a gas in beaker (i) is less than that in beaker (ii). done
clear
C)
The solubility of a gas is equal in both beakers. done
clear
D)
The solubility of a gas remains unaffected by change in weights. done
clear
View Solution play_arrow
question_answer 17)
Which of the following azeotropes is not correctly matched?
A)
\[HN{{O}_{3}}\] (68%) + \[{{H}_{2}}O\] (32%): Maximum boiling azeotrope, boiling point = 393.5 K done
clear
B)
\[{{H}_{2}}O\] (43%) + HI (57%) : Minimum boiling azeotrope, boiling point = 290 K done
clear
C)
\[{{C}_{2}}{{H}_{5}}OH\](95.5%) + \[{{H}_{2}}O\] (4.5%): Minimum boiling azeotrope, boiling point = 351.15 K done
clear
D)
Chloroform (93.2%) + \[{{C}_{2}}{{H}_{5}}OH\] (6.8%) : Minimum boiling azeotrope, boiling point = 332.3 K. done
clear
View Solution play_arrow
question_answer 18)
In the graph plotted between vapour pressure (V.P.) and temperature \[\left( \Delta T \right)\],
A)
PQ is the curve for solvent, XY is the curve of solution and \[\Delta T\] is depression in freezing point done
clear
B)
PQ is the curve for solution, XY is the curve for solvent and \[\Delta T\] is elevation in boiling point done
clear
C)
PQ is the curve for solvent, XY is the curve for solution and \[\Delta T\] is molal elevation in boiling point done
clear
D)
PQ is the curve for solvent, XY is the curve for solution and \[\Delta T\] is elevation in boiling point. done
clear
View Solution play_arrow
question_answer 19)
If semipermeable membrane is placed between the solvent and solution as shown in the given figure then
A)
the solvent molecules will flow through the membrane from solution to pure solvent done
clear
B)
the solvent molecules will flow continuously till the equilibrium is attained done
clear
C)
the flow of the solvent from its side to solution side across a semipermeable membrane can be stopped if some extra pressure (called osmotic pressure) is applied on the solution. done
clear
D)
both [b] and [c] done
clear
View Solution play_arrow
question_answer 20)
Osmotic pressure is generally preferred for determining the molecular masses of protein because
A)
it is difficult to find out mole fraction of proteins for calculations by other methods done
clear
B)
at elevated temperature the proteins are likely to decompose and osmotic pressure is measured around room temperature done
clear
C)
the apparatus involved in finding out osmotic pressure is simpler than other methods done
clear
D)
it is easy to boil or freeze a solution containing proteins. done
clear
View Solution play_arrow
question_answer 21)
Which of the following is not an industrial or biological importance of osmosis?
A)
Movement of water from soil into plant roots and upper portion of plant. done
clear
B)
Salting of meat to prevent bacterial action. done
clear
C)
Reverse osmosis for desalination of sea water. done
clear
D)
Filling of ink in a fountain pen. done
clear
View Solution play_arrow
question_answer 22)
Which of the following solutions is an example of negative deviation from Raoult's law?
A)
Acetone + Ethanol done
clear
B)
Carbon tetrachloride + Chloroform done
clear
C)
Acetone + Chloroform done
clear
D)
Water + Ethanol done
clear
View Solution play_arrow
question_answer 23)
Concentration terms like mass percentage, ppm, mole fraction and molality do not depend on temperature. However, molarity is a function of temperature because
A)
volume depends on temperature and molarity involves volume done
clear
B)
molarity involves non-volatile solute while all other terms involve volatile solute done
clear
C)
number of moles of solute change with change in temperature done
clear
D)
molarity is used for polar solvents only. done
clear
View Solution play_arrow
question_answer 24)
Match the column I with column II and mark the appropriate choice.
Column I Column II [a] \[{{K}_{b}}\] (i) \[\frac{{{K}_{b}}\times {{W}_{2}}\times 1000}{\Delta {{T}_{b}}\times {{W}_{1}}}\] [b] \[{{M}_{2}}\] (ii) \[\frac{{{W}_{2}}\times 1000}{{{M}_{2}}\times {{W}_{1}}}\] [c] \[\pi \] (iii) \[\frac{RT_{b}^{2}}{1000\times {{L}_{V}}}\] [d] M (iv) \[\frac{\Delta {{T}_{b}}\times dRT}{1000\times {{K}_{b}}}\]
A)
[A]\[\to \] (i), [B]\[\to \] (iii), [C]\[\to \] (ii), [D]\[\to \] (iv) done
clear
B)
[A]\[\to \] (iv), [B]\[\to \](ii), [C]\[\to \] (i), [D]\[\to \] (iii) done
clear
C)
[A]\[\to \] (ii), [B]\[\to \] (iv), [C]\[\to \] (iii), [D]\[\to \] (i) done
clear
D)
[A]\[\to \](iii), [B]\[\to \] (i), [C]\[\to \] (iv), [D]\[\to \] (ii) done
clear
View Solution play_arrow
question_answer 25)
Which of the following statements is not correct?
A)
Osmotic pressure (\[\pi \]) of a solution is given by the relation \[\pi \] = MRT where M is the molarity of the solution. done
clear
B)
The correct order of osmotic pressure for 0.2 M aqueous solution of each solute is \[CaC{{l}_{2}}<NaCl>C{{H}_{3}}COOH>\] glucose. done
clear
C)
Two solutions of sucrose of same molality prepared in different solvents will have same elevation in boiling point. done
clear
D)
Relative lowering in vapour pressure of a solution containing non-volatile solute is directly proportional to mole fraction of solute is Raoult's law. done
clear
View Solution play_arrow
question_answer 26)
What is the mass percentage of carbon tetrachloride if 22 g of benzene is dissolved in 122 g of carbon tetrachloride?
A)
84.72% done
clear
B)
15.28% done
clear
C)
50% done
clear
D)
44% done
clear
View Solution play_arrow
question_answer 27)
According to Henry's law 'the partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution". For different gases the correct statement about Henry's constant is
A)
higher the value of \[{{K}_{H}}\]at a given pressure higher is the solubility of the gas done
clear
B)
higher the value of \[{{K}_{H}}\] at a given pressure, lower is the solubility of the gas done
clear
C)
\[{{K}_{H}}\] is not a function of nature of gas done
clear
D)
\[{{K}_{H}}\]value for all gases is same at a given pressure. done
clear
View Solution play_arrow
question_answer 28)
People taking lot of salt experience puffiness or swelling of the body due to
A)
water retention in tissue cells and intercellular spaces because of osmosis done
clear
B)
water loss from the cells through skin tissues done
clear
C)
capillary action of water through skin pores done
clear
D)
excessive thirst and drinking more water. done
clear
View Solution play_arrow
question_answer 29)
Vapour pressure of a pure liquid X is 2 atm at 300 K. It is lowered to 1 atm on dissolving 1 g of Y in 20 g of liquid X. If molar mass of X is 200, what is the molar mass of Y?
A)
20 done
clear
B)
50 done
clear
C)
100 done
clear
D)
200 done
clear
View Solution play_arrow
question_answer 30)
Relative lowering of vapour pressure, osmotic pressure of a solution and elevation in boiling points are (p) properties. Osmosis is the passage of (q) through a semipermeable membrane from a solution of (r) towards a solution of (s). Osmotic pressure is equivalent to mechanical pressure which must be applied on (t) to prevent osmosis. In the above paragraph p, q, r, s and t respectively are
A)
colligative, solution, higher concentration, lower concentration, solution done
clear
B)
colligative, solvent, higher concentration, lower concentration, solution done
clear
C)
colligative, solution, lower concentration, higher concentration, solvent done
clear
D)
colligative, solvent, lower concentration, higher concentration, solution. done
clear
View Solution play_arrow
question_answer 31)
What will be the molality of a solution of glucose in water which is 10% w/W?
A)
0.01m done
clear
B)
0.617m done
clear
C)
0.668m done
clear
D)
1.623m done
clear
View Solution play_arrow
question_answer 32)
When acetone and chloroform are mixed together, hydrogen bonds are formed between them. Which of the following statements is correct about the solution made by mixing acetone and chloroform?
A)
On mixing acetone and chloroform will form an ideal solution. done
clear
B)
On mixing acetone and chloroform positive deviation is shown since the vapour pressure increases. done
clear
C)
On mixing acetone and chloroform negative deviation is shown since there is decrease in vapour pressure. done
clear
D)
At a specific composition acetone and chloroform will form minimum boiling azeotrope. done
clear
View Solution play_arrow
question_answer 33)
A 5% solution (w/W) of cane sugar (molar mass\[=\text{ }342\text{ }g\text{ }mo{{l}^{-1}}\]) has freezing point 271 K. What will be the freezing point of 5% glucose (molar mass\[=180\text{ }g\text{ }mo{{l}^{-1}}\]) in water if freezing point of pure water is 273.15 K?
A)
273.07 K done
clear
B)
269.07 K done
clear
C)
273.15 K done
clear
D)
260.09 K done
clear
View Solution play_arrow
question_answer 34)
Match the column I with column II and mark the appropriate choice.
Column I Column II [A] Ethyl alcohol + Water (i) \[p=\text{ }p{}^\circ x\] [B] Benzene + Toluene (ii) Effect of pressure on gas solutions [C] Henry's law (iii) Ideal solution [D] Raoult's law (iv) Azeotropic mixture
A)
[A] \[\to \] (i), [B] \[\to \](ii), [C] \[\to \] (iii), [D] \[\to \] (iv) done
clear
B)
[A] \[\to \](i), [B] \[\to \](iii), [C] \[\to \] (ii), [D] \[\to \] (iv) done
clear
C)
[A] \[\to \] (iv), [B] \[\to \] (iii), [C] \[\to \] (ii), [D] \[\to \] (i) done
clear
D)
[A] \[\to \] (iii), [B] \[\to \] (ii), [C] \[\to \](i), [D] \[\to \] (iv) done
clear
View Solution play_arrow
question_answer 35)
\[{{H}_{2}}S\]is a toxic gas used in qualitative analysis. If solubility of \[{{H}_{2}}S\] in water at STP is 0.195 m, what is the value of \[{{K}_{H}}\]?
A)
0.0263 bar done
clear
B)
69.16 bar done
clear
C)
192 bar done
clear
D)
282 bar done
clear
View Solution play_arrow
question_answer 36)
Which of the following statements is correct?
A)
A saturated solution will remain saturated at all temperatures. done
clear
B)
A plant cell swells when placed in hypertonic solution. done
clear
C)
The depression in freezing point is directly proportional to molality of the solution. done
clear
D)
Lowering in vapour pressure is a colligative property. done
clear
View Solution play_arrow
question_answer 37)
The relative lowering in vapour pressure is proportional to the ratio of number of
A)
solute molecules to solvent molecules done
clear
B)
solvent molecules to solute molecules done
clear
C)
solute molecules to the total number of molecules in solution done
clear
D)
solvent molecules to the total number of molecules in solution. done
clear
View Solution play_arrow
question_answer 38)
Intermolecular forces between Ti-hexane and n-heptane are nearly same as between hexane and heptane individually. When these two are mixed, which of the following is not true about the solution formed?
A)
It obeys Raoult's law, i.e. \[{{P}_{A}}={{x}_{A}}\,{{P}^{{}^\circ }}_{A}\]and\[{{P}_{B}}={{x}_{B}}\,P{{{}^\circ }_{B}}\] done
clear
B)
\[\Delta {{H}_{mixing}}\] is zero. done
clear
C)
\[\Delta {{V}_{mixing}}\]is zero. done
clear
D)
It forms minimum boiling azeotrope. done
clear
View Solution play_arrow
question_answer 39)
The given graph shows the vapour pressure- temperature curves for some liquids. Liquids A, B, C and D respectively are
A)
diethyl ether, acetone, ethyl alcohol, water done
clear
B)
acetone, ethyl alcohol, diethyl ether, water done
clear
C)
water, ethyl alcohol, acetone, diethyl ether done
clear
D)
ethyl alcohol, acetone, diethyl ether, water. done
clear
View Solution play_arrow
question_answer 40)
Grapes placed in three beakers X, Y and Z containing different type of solutions are shown in figures. If beaker X contains water, Y and Z contain
A)
Y - hypotonic solution, Z - hypertonic solution done
clear
B)
Y - hypertonic solution, Z - hypotonic solution done
clear
C)
Y and Z- isotonic solutions done
clear
D)
Y and Z- hypotonic solutions. done
clear
View Solution play_arrow
question_answer 41)
X, Y and Z in the above graph are
A)
\[X={{p}_{1}}+{{p}_{2}},\,Y=1,\,Z=0\] done
clear
B)
\[X={{p}_{1}}+{{p}_{2}},\,Y=0,\,Z=1\] done
clear
C)
\[X={{p}_{1}}\times {{p}_{2}},\,Y=0,\,Z=1\] done
clear
D)
\[Z={{p}_{1}}-{{p}_{2}},\,Y=1,\,Z=0\] done
clear
View Solution play_arrow
question_answer 42)
Which of the following solutions shows positive deviation from Raoult's law?
A)
Acetone + Aniline done
clear
B)
Acetone + Ethanol done
clear
C)
Water + Nitric acid done
clear
D)
Chloroform + Benzene done
clear
View Solution play_arrow
question_answer 43)
Which of the following statements is correct about diffusion and osmosis? (i) In osmosis, a semipermeable membrane is used while diffusion is without membrane. (ii) In osmosis, movement of molecules occurs in one direction while in diffusion, movement occurs in all directions. (iii) In osmosis, only the solvent moves while in diffusion both solute and solvent move.
A)
(i) and (ii) done
clear
B)
(i) only done
clear
C)
(ii) and (iii) done
clear
D)
(i), (ii) and (iii) done
clear
View Solution play_arrow
question_answer 44)
What are the conditions for an ideal solution which obeys Raoult's law over the entire range of concentration?
A)
\[{{\Delta }_{mix}}H=0,\,{{\Delta }_{mix}}V=0,\,{{P}_{Total}}=P_{A}^{{}^\circ }{{x}_{A}}+P_{B}^{{}^\circ }{{x}_{B}}\] done
clear
B)
\[{{\Delta }_{mix}}H=+ve,\,{{\Delta }_{mix}}V=0,\,{{P}_{Total}}=P_{A}^{{}^\circ }{{x}_{A}}+P_{B}^{{}^\circ }{{x}_{B}}\] done
clear
C)
\[{{\Delta }_{mix}}H=0,\,{{\Delta }_{mix}}V=+ve,\,{{P}_{Total}}=P_{A}^{{}^\circ }{{x}_{A}}+P_{B}^{{}^\circ }{{x}_{B}}\] done
clear
D)
\[{{\Delta }_{mix}}H=0,\,{{\Delta }_{mix}}V=0,\,{{P}_{Total}}=P_{B}^{{}^\circ }{{x}_{B}}\] done
clear
View Solution play_arrow
question_answer 45)
Solubility of a substance is its maximum amount that can be dissolved in a specified amount of solvent. It depends upon (i) nature of solute (ii) nature of solvent (iii) temperature (iv) amount of solvent
A)
(i), (ii) and (iii) done
clear
B)
(i), (iii) and (iv) done
clear
C)
(i) and (iv) done
clear
D)
(i), (ii), (iii) and (iv) done
clear
View Solution play_arrow
question_answer 46)
250 mL of sodium carbonate solution contains 2.65 g of \[N{{a}_{2}}C{{O}_{3}}\]. If 10 mL of this solution is diluted to 500 mL, the concentration of the diluted acid will be
A)
0.01 M done
clear
B)
0.001 M done
clear
C)
0.05 M done
clear
D)
0.002 M done
clear
View Solution play_arrow
question_answer 47)
A solution is obtained by mixing 200 g of 30% and 300 g of 20% solution by weight. What is the percentage of solute in the final solution?
A)
50% done
clear
B)
28% done
clear
C)
64% done
clear
D)
24% done
clear
View Solution play_arrow
question_answer 48)
What will be the molarity of 30 mL of 0.5 M \[{{H}_{2}}S{{O}_{4}}\]solution diluted to 500 mL?
A)
0.3 M done
clear
B)
0.03 M done
clear
C)
3M done
clear
D)
0.103 M done
clear
View Solution play_arrow
question_answer 49)
The preservation of meat by salting and of fruits by adding sugar protects them from bacterial action because
A)
bacteria die of eating sugar or salt done
clear
B)
due to osmosis bacteria lose water on salted meat or candid fruit and die done
clear
C)
due to osmosis bacteria gain water on salted meat or candid fruit and die done
clear
D)
bacteria get stuck to the salt and sugar layers and die. done
clear
View Solution play_arrow
question_answer 50)
Fill in the blanks with appropriate words. Azeotropic mixtures boil without change in their ___. Azeotropic mixtures exist in solutions showing ____ or ___ deviations. ___ solutions do not form azeotropes.
A)
colour, positive, negative, non-ideal done
clear
B)
properties, positive, negative, ideal done
clear
C)
boiling point, positive, negative, non-ideal done
clear
D)
composition, positive, negative, ideal done
clear
View Solution play_arrow
question_answer 51)
Consider the figure and mark the correct option.
A)
Water will move from side [A] to side [B] if a pressure lower than osmotic pressure is ted applied on piston [B]. done
clear
B)
Water will move from side [B] to side [A] if a pressure greater than osmotic pressure is applied on piston [B]. done
clear
C)
Water will move from side [B] to side [A] if a pressure equal to osmotic pressure is applied on piston [B]. done
clear
D)
Water will move from side [A] to side [B] if pressure equal to osmotic pressure is applied on piston [A]. done
clear
View Solution play_arrow
question_answer 52)
The system that forms maximum boiling azeotrope is
A)
acetone - chloroform done
clear
B)
ethanol - acetone done
clear
C)
n-hexane - m-heptane done
clear
D)
carbon disulphide - acetone done
clear
View Solution play_arrow
question_answer 53)
Two beakers of capacity 500 mL were taken. One of these beakers, labelled as "A", was filled with 400 mL water whereas the beaker labelled "B" was filled with 400 mL of 2 M solution of NaCl. At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in figure. At a given temperature, which of the following statements is correct about the vapour pressure of pure water and that of NaCl solution.
A)
Vapour pressure in container [A] is more than that in container [B]. done
clear
B)
Vapour pressure in container [A] is less than that in container [B]. done
clear
C)
Vapour pressure is equal in both the containers. done
clear
D)
Vapour pressure in container [B]is twice the vapour pressure in container [A]. done
clear
View Solution play_arrow
question_answer 54)
Equimolal solutions in the same solvent have
A)
same elevation in boiling point and same depression in freezing point done
clear
B)
different elevation in boiling point and different depression in freezing point done
clear
C)
same elevation in boiling point but different depression freezing point done
clear
D)
same depression in freezing point but different elevation in boiling point. done
clear
View Solution play_arrow
question_answer 55)
Sprinkling of salt helps in clearing the snow covered roads in hills. The phenomenon involved in the process is
A)
lowering in vapour pressure of snow done
clear
B)
depression in freezing point of snow done
clear
C)
increase in freezing point of snow done
clear
D)
melting of ice due to increase in temperature by putting salt. done
clear
View Solution play_arrow
question_answer 56)
When a gas is bubbled through water at 298 K, a very dilute solution of gas is obtained. Henry's law constant for the gas is 100 kbar. If gas exerts a pressure of 1 bar, the number of moles of gas dissolved in 1 litre of water is
A)
0.0555 done
clear
B)
\[55.55\times {{10}^{-5}}\] done
clear
C)
\[55.55\times {{10}^{-3}}\] done
clear
D)
\[5.55\times {{10}^{-5}}\] done
clear
View Solution play_arrow
question_answer 57)
Study the following figure showing osmosis and mark the correct statement.
A)
The external pressure applied on the solution to stop osmosis is called osmotic pressure. done
clear
B)
The external pressure applied on the solvent to stop osmosis is called osmotic pressure. done
clear
C)
The hydrostatic pressure built up on solvent which just stops osmosis is osmotic pressure. done
clear
D)
Pressure developed by solvent while solution flows through semipermeable membrane. done
clear
View Solution play_arrow
question_answer 58)
Match the column I with column II and mark the appropriate choice.
Column I Column II [A] \[\Delta {{H}_{mix}}=0,\,\Delta {{V}_{mix}}=0\] (i) Non-ideal solution [B] \[\Delta {{H}_{mix}}\ne 0,\,\Delta {{V}_{mix}}\ne 0\] (ii) Positive deviation [C] \[\Delta {{H}_{mix}}<0,\,\Delta {{V}_{mix}}<0\] (iii) Ideal solution [D] \[\Delta {{H}_{mix}}>0,\,\Delta {{V}_{mix}}>0\] (iv) Negative deviation
A)
[A]\[\to \](i), [B]\[\to \] (iii), [C]\[\to \] (ii), [D]\[\to \] (iv) done
clear
B)
[A]\[\to \] (iii), [B]\[\to \] (i), [C]\[\to \] (iv), [D]\[\to \](ii) done
clear
C)
[A]\[\to \] (ii), [B]\[\to \](iii), [C]\[\to \] (iv), [D]\[\to \] (i) done
clear
D)
[A]\[\to \] (iii), [B]\[\to \](ii), [C]\[\to \] (i), [D] \[\to \](iv) done
clear
View Solution play_arrow
question_answer 59)
A plant cell shrinks when it is kept in a
A)
hypotonic solution done
clear
B)
hypertonic solution done
clear
C)
isotonic solution done
clear
D)
pure water. done
clear
View Solution play_arrow
question_answer 60)
A solution containing 10.2 g glycerine per litre is isotonic with a 2% solution of glucose. What is the molecular mass of glycerine?
A)
91.8 g done
clear
B)
1198 g done
clear
C)
83.9 g done
clear
D)
890.3g done
clear
View Solution play_arrow