12th Class Chemistry Solutions / विलयन Question Bank

done Assertion And Reason (MCQs) - Solutions Total Questions - 15

• question_answer1)

  Directions : (Q. 1 to 15)

  For question numbers 1 - 15, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

  Assertion: Dilute solution of benzene and toluene is an ideal solution.

  Reason: Benzene and toluene form H-bonding with each other.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer2)

  Assertion: Solutions having the same osmotic pressure are called isotonic solutions.

  Reason: \[C{{a}^{2+}}\] and \[{{K}^{+}}\] ions are responsible for maintaining proper osmotic pressure balance in the cells of organism.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer3)

  Assertion: Osmotic pressure is a colligative property.

  Reason: Osmotic pressure depends only on the number of particles dissolved in solution.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer4)

  Assertion: The pressure exerted by the vapour in equilibrium with a liquid at a given temperature is called its vapour pressure.

  Reason: If a non-volatile solute is added to a solvent to give a solution, the vapour pressure of the solution is found to be greater than the vapour pressure of the pure solvent.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer5)

  Assertion: A solution is a homogeneous mixture of two or more chemically non-reacting substances.

  Reason: Solutions can be made between any two states of matter.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer6)

  Assertion: Water boils at 373 K as the vapour pressure at this temperature becomes equal to atmospheric pressure.

  Reason: Vapour pressure of water is less than 1.013 bar at 373 K.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer7)

  Assertion: The boiling point of 200 mL of 1 M urea solution is less than that of 200 mL of 2 M glucose solution.

  Reason: Elevation of boiling point is directly proportional to the number of species present in the solution.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer8)

  Assertion: Reverse osmosis is used in the desalination of sea water.

  Reason: When pressure more than osmotic pressure is applied, pure water is squeezed out 1 of the sea water through the membrane.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer9)

  Assertion: Camphor is used as a solvent in the determination of molecular masses of naphthalene, anthracene, etc.

  Reason: Camphor has high molal elevation constant.

   
  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer10)

  Assertion: Solutions show deviations from Raoult's law.

  Reason: The cause for these deviations lies in the nature of interactions at the molecular level.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer11)

  Assertion: One molal aqueous solution of urea contains 60 g of urea in 1 kg of water.

  Reason: Solution containing one mole of solute in 1000 g solvent is called one molal solution.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer12)

  Assertion: When a concentrated solution is diluted by adding more water, the number of moles of solute in the solution remains unchanged.

  Reason: Number of moles of a solute is equal to the product of molarity and volume of solution in litres.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer13)

  Assertion: The molality of the solution does not change with change in temperature.

  Reason: The molality is expressed in units of moles per 1000 g of solvent.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer14)

  Assertion: If a liquid solute, more volatile than the solvent, is added to the solvent, the vapour pressure of the solution may increase i.e. \[{{P}_{S}}>P{}^\circ \]

  Reason: In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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• question_answer15)

  Assertion: Elevation in boiling point and depression in freezing point are colligative properties.

  Reason: All colligative properties are used for the calculation of molecular masses

  A)
  Assertion and reason both are correct statements and reason is correct explanation for assertion. done clear
  B)
  Assertion and reason both are correct statements but reason is not correct explanation for assertion. done clear
  C)
  Assertion is correct statement but reason is wrong statement. done clear
  D)
  Assertion is wrong statement but reason is correct statement. done clear
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