Unit 2 » Solutions- MCQs (12th) | Chemistry | Objective Questions- 12th

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

Sep 05, 2022 at 07:10 AM

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

Sep 05, 2022 at 07:11 AM

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

Sep 05, 2022 at 07:13 AM

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

Sep 05, 2022 at 07:15 AM

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

Sep 10, 2022 at 05:24 AM

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

Sep 10, 2022 at 05:25 AM

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

Sep 10, 2022 at 05:30 AM

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

Sep 10, 2022 at 05:48 AM

Multiple Choice

ID- 12203

9. H₂S is a toxic gas used in qualitative analysis. If solubility of H₂S 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

Sep 10, 2022 at 05:52 AM

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

Sep 10, 2022 at 05:55 AM

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 MgCI₂ solution is:

(A) same
(B) about twice
(C) about three times
(D) about six times

Sep 10, 2022 at 06:01 AM

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

Sep 10, 2022 at 06:04 AM

Multiple Choice

ID- 12207

13. Among the following is substances the lowest pressure is exerted by:

(A) water
(B) alcohol
(C) ether
(D) mercury

Sep 10, 2022 at 06:06 AM

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

Sep 10, 2022 at 06:08 AM

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

Sep 10, 2022 at 06:10 AM

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

Sep 10, 2022 at 06:13 AM

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

Sep 10, 2022 at 06:14 AM

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

Sep 10, 2022 at 06:16 AM

Multiple Choice

ID- 12213

BSEB, 2021 (A)

19. The van't Hoff factor of Ca(NO₃)₂ is:

(A) 1
(B) 2
(C) 3
(D) 4

Sep 10, 2022 at 06:18 AM

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

Sep 10, 2022 at 06:20 AM

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

Sep 10, 2022 at 06:23 AM

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 C₂H₅OH
(C) 0.005 M Mgl₂
(D) 0.005 M MgSO₄

Sep 10, 2022 at 06:25 AM

Multiple Choice

ID- 12217

BSEB, 2018 (A)

23. What will be the degree of dissociation of 0.1 M Mg(NO₃)₂ solution if van't Hoff factor is 2.74?

(A) 75%
(B) 87%
(C) 100%
(D) 92%

Sep 10, 2022 at 06:29 AM

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

Sep 10, 2022 at 06:31 AM

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

Sep 10, 2022 at 06:39 PM

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

Sep 10, 2022 at 06:40 PM

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

Sep 10, 2022 at 06:42 PM

Multiple Choice

ID- 12310

BSEB, 2019 (A)

28. pH of pure water is:

(A) 1
(B) 4
(C) 3
(D) 7

Sep 10, 2022 at 06:43 PM

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 Na₂SO₄
(C) 1.0 M NH₄NO₃
(D) 1.0 M KNO₃

Sep 10, 2022 at 06:47 PM

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)

Sep 10, 2022 at 07:22 PM

Multiple Choice

ID- 12313

BSEB, 2021 (A)

31. Which is not affected by temperature?

(A) Normality
(B) Molality
(C) Molarity
(D) Formality

Sep 10, 2022 at 06:54 PM

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

Sep 10, 2022 at 07:00 PM

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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

Sep 10, 2022 at 07:03 PM

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Multiple Choice

ID- 12316

BSEB, 2017 (A)

34. A zeotropic mixture of HCI and H₂O has:

(A) 48% HCI

(B) 22.21 HCI

(C) 36% HCI

(D) 20.2%

Sep 10, 2022 at 07:09 PM

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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

Sep 10, 2022 at 07:10 PM

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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

Sep 10, 2022 at 07:14 PM

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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

Sep 10, 2022 at 07:16 PM

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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

Sep 10, 2022 at 07:26 PM

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Multiple Choice

ID- 12337

BSEB, 2021 (A)

39. Tyndall effects is observed in:

(A) Solution

(B) Precipitate

(C) Colloidal Solution

(D) Vapours

Sep 10, 2022 at 08:32 PM

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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 = $\frac{RT}{C}$

Sep 27, 2022 at 09:00 AM

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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) $\frac{n}{N}$

Sep 27, 2022 at 09:09 AM

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Solutions

Board » Bihar Board » Class 12th » English Medium » Science » Chemistry » Part-1 » Unit 2: Solutions

Objective Questions (MCQs)

1. By osmosis Semipermeable membrane (S.P.M.) allows to pass

2. Which of the following the property of ideal solution?

3. The boiling point of water decreases at high mountains because

4. Which of the following is a colligative property of solution?

5. If 2 gm of NaOH is present in 200 ml of its solution, its molarity will be:

6. The atmospheric pollution in generally measured in the units of:

7. A 5% solution of cane-sugar (molecular weight = is isotonic with 1% solution of substance X. The molecular weight of X is:

8. 234.2 gm of sugar syrup contains 34.2 gm of sugar. What is the molal concentration of the solution:

9. H2S is a toxic gas used in qualitative analysis. If solubility of H2S in water at STP is 0.195 m, what is the value of KH?

10. Atomic mass is equal to:

11. In comparison to 0.01 M solution of glucose, the depression in freezing point of 0.01 M MgCI2 solution is:

12. The law which indicates the relationship between solubility of a gas in liquid and pressure is .......... .

13. Among the following is substances the lowest pressure is exerted by:

14. Partial pressure of a solution component is directly proportional to its mole fraction. This is known as

15. Which of the following solutions shows positive deviation from Raoult's law?

16. The system that forms maximum boiling azeotrope is:

17. A plant cells shrinks when it is kept in a:

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?

19. The van't Hoff factor of Ca(NO3)2 is:

20. The osmotic pressure of a solution can be increased by

21. Sprinkling of salt helps in clearing the snow covered roads in hills. The phenomenon involved in the process is:

22. Which aqueous solution has the minimum freezing point?

23. What will be the degree of dissociation of 0.1 M Mg(NO3)2 solution if van't Hoff factor is 2.74?

24. Which of the following units in useful in relating concentration of solution with its vapour pressure?

25. At equilibrium the rate of dissociation of a solid solute in a volatile liquid solvent is .......... .

26. The pH of human blood is approximately:

27. Low concentration of oxygen in the blood and tissues of people living at high attitude is due to .......... .

28. pH of pure water is:

29. Which of the following aqueous solutions should have the highest boiling point?

30. The unit of ebulioscopic constant is .......... .

31. Which is not affected by temperature?

32. Value of Henry's constant KH .......... .

33. A solution has an osmotic pressure of 0.0821 atm. at 300 K. Its concentration should be:

34. A zeotropic mixture of HCI and H2O has:

35. Osmotic pressure can be increased by:

36. The freezing point of an aqueous solution is –0.186°C. What is the elevation of boiling point of this solution if Kf = 1.86 and Kb = 0.512?

37. Which of the following is not a colligative property of solution?

38. The value of Henry's constant KH is .......... .

39. Tyndall effects is observed in:

40. Which of the following equations represent osmotic pressure?

41. If n is number of moles of solute and N is number of moles of solvent then mole fraction strength of solute is:

9. H₂S is a toxic gas used in qualitative analysis. If solubility of H₂S in water at STP is 0.195 m, what is the value of K_H?

11. In comparison to 0.01 M solution of glucose, the depression in freezing point of 0.01 M MgCI₂ solution is:

19. The van't Hoff factor of Ca(NO₃)₂ is:

23. What will be the degree of dissociation of 0.1 M Mg(NO₃)₂ solution if van't Hoff factor is 2.74?

32. Value of Henry's constant K_H .......... .

34. A zeotropic mixture of HCI and H₂O has:

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?

38. The value of Henry's constant K_H is .......... .