Solution quiz-1

 

Solution

Quiz

 

1. Assertion: Molality is a better method to express concentration than molarity
   Reason: Molality is defined in terms of mass of solvent and not mass of solution.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
2. Assertion: Soda bottles are sealed under high pressure.
   Reason: High pressure increases the solubility of carbon dioxide gas.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
3. Assertion: There will not be any change in concentration of an ethanol and water mixture containing 85% ethanol by volume on boiling.
   Reason: It is because azeotropes boil out in constant composition.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
4. Assertion: Benzene and hexane form an ideal solution.
   Reason: Both benzene and hexane are hydrocarbons.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
5. Assertion: 1 molar NaCl solution has higher boiling point than one molar urea.
   Reason: NaCl dissociates into ions in solution.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
6. Assertion: A raw mango placed in concentrated salt solution loses water shrivel into pickle.
   Reason: The salt solution is hypotonic compared to the raw mango.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
7. Assertion: Helium is mixed with nitrogen and oxygen in diving cylinders
   Reason: Helium has comparatively low KH value.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
8. Assertion: Ice containing dissolved sugar will melt at a higher temperature than pure ice.
   Reason: Dissolving sugar in water leads to a depression in freezing point.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
9. Assertion : Vapour pressure of a solution is more that of the pure solvent.
   Reason: The solute particles occupy certain area of the surface of the solution which reduces the amount of vapour.
   1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
   2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
   3.   Assertion is correct, but reason is wrong statement.
   4.   Assertion is wrong, but reason is correct statement.
10. Which of the following aqueous solutions should have the highest boiling point?
    1.   1.0 M NaOH
    2.   1.0 M Na2SO4
    3.   1.0 M NH4NO3
    4.   1.0 M KNO3
11. KH value for Ar(g), CO2 (g), HCHO (g) and CH4 (g) are 40.39, 1.67, 1.83×10–5 and 0.413 respectively.
    Arrange these gases in the order of their increasing solubility.
    1.   HCHO< CH4 < CO2 <Ar
    2.   HCHO< CO2 < CH4 <Ar
    3.   Ar< CO2 < CH4 < HCHO
    4.   Ar< CH4 < CO2 < HCHO
12. 4.On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid?
    1.   Sugar crystals in cold water.
    2.   Sugar crystals in hot water.
    3.   Powdered sugar in cold water.
    4.   Powdered sugar in hot water.
13. Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon __________.
    
    1.   Temperature
    2.   Nature of solute
    3.   Pressure
    4.   Nature of solvent
14. The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to :
    1.   Ionisation of benzoic acid
    2.   Dimerisation of benzoic acid
    3.   Trimerisation of benzoic acid
    4.   Solvation of benzoic acid
15. The hard shell of an egg was dissolved in HCl. The egg was then placed in a concentrated solution of NaCl. What will happen?
    1.   The egg will shirnk.
    2.   The egg will swell.
    3.   The egg will become harder.
    4.   No visible change noticed.
16. How many grams of 70% concentrated Nitric acid solution is used to prepare 250mL of 2.0M HNO3?
    1.   45 g
    2.   90.0 g
    3.   70.0 g
    4.   54.0 g
17. Dipole induced dipole interactions are present in which of the following pairs?
    1.   Water and ethanol
    2.   Cl2 and CCl4
    3.   HCl and Iodine molecules.
    4.   SiF4 and He atoms
18. The molarity of solutions obtained by mixing 750 mL of 0.5M HCl with 250 mL of 2M HCl will be:
    1.   0.875 M
    2.   0.01M
    3.   0.001M
    4.   0.1M
19. Which of the following is dependent on temperature?
    1.   Molarity
    2.   Mole fraction
    3.   Mass percentage
    4.   Molality
20. If the molality of the solution is doubled. The value of molal depression constant (kf) will be
    1.   Halved
    2.   Tripled
    3.   Unchanged
    4.   Doubled
21. Which of the following liquid pairs show a positive deviation from Rault’s law-
    1.   Water and HCl
    2.   Benzene and Methanol
    3.   Water and Nitric acid
    4.   Acetone and Chloroform
22. An unripe mango placed in the solution of concentrated NaCl to prepare pickle, shirnks due to :
    1.   It gains water due to reverse osmosis
    2.   It loses water due to reverse osmosis
    3.   It gains water due to osmosis
    4.   It loses water due to osmosis
23. Assertion : When methyl alcohol is added to water, boiling point of water increases.
    Reason : When a volatile solute is added to a volatile solvent elevation in boiling point is observed.
    1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
    2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
    3.   Assertion is correct, but reason is wrong statement.
    4.   Assertion is wrong, but reason is correct statement.
24. Assertion : When NaCl is added to water a depression in freezing point is observed.
    Reason : The lowering of vapour pressure of a solution causes depression in the freezing point.
    
    1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
    2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
    3.   Assertion is correct, but reason is wrong statement.
    4.   Assertion is wrong, but reason is correct statement.
25. Assertion : When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.
    Reason : Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.
    1.   Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
    2.   Both assertion and reason are correct statements, but reason is not the correct explanation of the assertion.
    3.   Assertion is correct, but reason is wrong statement.
    4.   Assertion is wrong, but reason is correct statement.
26. The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows
    1.   no deviation from Raoult’s Law.
    2.   positive deviation from Raoult’s Law.
    3.   negative deviation from Raoult’s Law.
    4.   that the solution is unsaturated.