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Multiple Choice
ID- 11802
BSEB, 2020 (A)
1. By osmosis Semipermeable membrane (S.P.M.) allows to pass
(A) solute molecules
(B) solvent molecules
(C) complex ion
(D) simple ion
Multiple Choice
ID- 11803
BSEB, 2020 (A)
2. Which of the following the property of ideal solution?
(A) Obeys Raoult's law
(B) Does not obey Raoult's law
(C) Both 'A' and 'B'
(D) None of these
Multiple Choice
ID- 11804
BSEB, 2020 (A)
3. The boiling point of water decreases at high mountains because
(A) atmospheric pressure is low
(B) temperature is low
(C) pressure is high
(D) more air
Multiple Choice
ID- 11805
BSEB, 2020 (A), 2021 (A)
4. Which of the following is a colligative property of solution?
(A) Osmotic Pressure
(B) Surface tension
(C) Conductivity
(D) Half-life period
Multiple Choice
ID- 12199
BSEB, 2013, 2015
5. If 2 gm of NaOH is present in 200 ml of its solution, its molarity will be:
(A) 0.25
(B) 0.5
(C) 5
(D) 10
Multiple Choice
ID- 12200
6. The atmospheric pollution in generally measured in the units of:
(A) mass percentage
(B) volume percentage
(C) volume fraction
(D) ppm
Multiple Choice
ID- 12201
BSEB, 2018 (A)
7. A 5% solution of cane-sugar (molecular weight = is isotonic with 1% solution of substance X. The molecular weight of X is:
(A) 342
(B) 171.2
(C) 68.4
(D) 136.8
Multiple Choice
ID- 12202
BSEB, 2011, 2021 (A)
8. 234.2 gm of sugar syrup contains 34.2 gm of sugar. What is the molal concentration of the solution:
(A) 0.1
(B) 0.5
(C) 5.5
(D) 55
Multiple Choice
ID- 12203
9. 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
(B) 69.16 bar
(C) 192 bar
(D) 282 bar
Multiple Choice
ID- 12204
BSEB, 2016
10. Atomic mass is equal to:
(A) number of electrons of an atom
(B) sum of the numbers of electrons and photons of an atom
(C) sum of the numbers of neutrons and protons of an atom
(D) none of these
Multiple Choice
ID- 12205
BSEB, 2021 (A)
11. In comparison to 0.01 M solution of glucose, the depression in freezing point of 0.01 M MgCI
2
solution is:
(A) same
(B) about twice
(C) about three times
(D) about six times
Multiple Choice
ID- 12206
12. The law which indicates the relationship between solubility of a gas in liquid and pressure is .......... .
(A) Raoult's law
(B) Henry's law
(C) Lowering of vapour pressure
(D) van't Hoff law
Multiple Choice
ID- 12207
13. Among the following is substances the lowest pressure is exerted by:
(A) water
(B) alcohol
(C) ether
(D) mercury
Multiple Choice
ID- 12208
14. Partial pressure of a solution component is directly proportional to its mole fraction. This is known as
(A) Henry's law
(B) Raoult's law
(C) Distribution law
(D) Ostwald's dilution law
Multiple Choice
ID- 12209
15. Which of the following solutions shows positive deviation from Raoult's law?
(A) Acetone + Aniline
(B) Acetone + Ethanol
(C) Water + Nitric acid
(D) Chloroform + Benzen
Multiple Choice
ID- 12210
16. The system that forms maximum boiling azeotrope is:
(A) Acetone-chloroform
(B) ethanol-acetone
(C) n-hexane-n-heptane
(D) carbon disulphide-acetone
Multiple Choice
ID- 12211
17. A plant cells shrinks when it is kept in a:
(A) hypotonic solution
(B) hypertonic solution
(C) istonic solution
(D) pure water
Multiple Choice
ID- 12212
18. 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
(B) 1198 g
(C) 83.9 g
(D) 890.3 g
Multiple Choice
ID- 12213
BSEB, 2021 (A)
19. The van't Hoff factor of Ca(NO
3
)
2
is:
(A) 1
(B) 2
(C) 3
(D) 4
Multiple Choice
ID- 12214
20. The osmotic pressure of a solution can be increased by
(A) increasing the volume
(B) increasing the number of solute molecules
(C) decreasing the temperature
(D) removing semipermeable membrane
Multiple Choice
ID- 12215
21. 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
(B) depression in freezing point of snow
(C) increase in freezing point of snow
(D) melting of ice due to increase in temperature by putting salt
Multiple Choice
ID- 12216
BSEB, 2018 (C)
22. Which aqueous solution has the minimum freezing point?
(A) 0.01 M NaCI
(B) 0.005 M C
2
H
5
OH
(C) 0.005 M Mgl
2
(D) 0.005 M MgSO
4
Multiple Choice
ID- 12217
BSEB, 2018 (A)
23. What will be the degree of dissociation of 0.1 M Mg(NO
3
)
2
solution if van't Hoff factor is 2.74?
(A) 75%
(B) 87%
(C) 100%
(D) 92%
Multiple Choice
ID- 12218
24. Which of the following units in useful in relating concentration of solution with its vapour pressure?
(A) Mole fraction
(B) Parts per million
(C) Mass percentage
(D) Molality
Multiple Choice
ID- 12307
25. At equilibrium the rate of dissociation of a solid solute in a volatile liquid solvent is .......... .
(A) less then the rate of crystallisation
(B) greater than the rate of crystallisation
(C) equal to the rate of crystallisation
(D) zero
Multiple Choice
ID- 12308
BSEB, 2018 (C)
26. The pH of human blood is approximately:
(A) 6.5
(B) 7.0
(C) 7.4
(D) 8.2
Multiple Choice
ID- 12309
27. Low concentration of oxygen in the blood and tissues of people living at high attitude is due to .......... .
(A) low temperature
(B) low atmospheric pressure
(C) high atmospheric pressure
(D) Both low temperature and high atmospheric pressure
Multiple Choice
ID- 12310
BSEB, 2019 (A)
28. pH of pure water is:
(A) 1
(B) 4
(C) 3
(D) 7
Multiple Choice
ID- 12311
BSEB, 2017 (A)
29. Which of the following aqueous solutions should have the highest boiling point?
(A) 1.0 M NaOH
(B) 1.0 M Na
2
SO
4
(C) 1.0 M NH
4
NO
3
(D) 1.0 M KNO
3
Multiple Choice
ID- 12312
30. The unit of ebulioscopic constant is .......... .
(A) K kg mol
–1
or K (molality)
–1
(B) mol kg K
–1
or K
–1
(molality)
(C) kg mol
–1
or K
–1
(molality)
–1
(D) K mol kg
–1
or K (molality)
Multiple Choice
ID- 12313
BSEB, 2021 (A)
31. Which is not affected by temperature?
(A) Normality
(B) Molality
(C) Molarity
(D) Formality
Multiple Choice
ID- 12314
32. Value of Henry's constant
K
H
.......... .
(A) greater for gases with higher solubility
(B) greater for gases with lower solubility
(C) constant for all gases
(D) not related to the solubility of gases
Multiple Choice
ID- 12315
BSEB, 2017 (A)
33. A solution has an osmotic pressure of 0.0821 atm. at 300 K. Its concentration should be:
(A) 0.66 m
(B) 0.32 m
(C) 0.066 m
(D) 0.033 m
Multiple Choice
ID- 12316
BSEB, 2017 (A)
34. A zeotropic mixture of HCI and H
2
O has:
(A) 48% HCI
(B) 22.21 HCI
(C) 36% HCI
(D) 20.2%
Multiple Choice
ID- 12317
BSEB, 2016 (C)
35. Osmotic pressure can be increased by:
(A) Increasing temperature
(B) decreasing temperature
(C) increasing volume
(D) none
Multiple Choice
ID- 12318
BSEB, 2017 (C)
36. The freezing point of an aqueous solution is –0.186°C. What is the elevation of boiling point of this solution if K
f
= 1.86 and K
b
= 0.512?
(A) 0.186
(B) –0.512
(C) 1.86
(D) 0.0512
Multiple Choice
ID- 12319
BSEB, 2017 (C)
37. Which of the following is not a colligative property of solution?
(A) Depression of freezing point
(B) Elevation of Boiling point
(C) Relative lowering vapour pressure
(D) Optical activity
Multiple Choice
ID- 12320
38. The value of Henry's constant
K
H
is .......... .
(A) greater for gases with higher solubility
(B) greater for gases with lower solubility
(C) constant for all gases
(D) not related to the solubility of gases
Multiple Choice
ID- 12337
BSEB, 2021 (A)
39. Tyndall effects is observed in:
(A) Solution
(B) Precipitate
(C) Colloidal Solution
(D) Vapours
Multiple Choice
ID- 14513
BSEB, 2020 (A)
40. Which of the following equations represent osmotic pressure?
(A) P = CRT
(B) P = $\frac{CT}{R}$
(C) P = $\frac{RC}{T}$
(D) P = $\frac{RT}{C}$
Multiple Choice
ID- 14514
BSEB, 2017 (C)
41. If
n
is number of moles of solute and N is number of moles of solvent then mole fraction strength of solute is:
(A) n + N
(B) $\frac{n}{N + n}$
(C) $\frac{N}{N + n}$
(D) $\frac{n}{N}$