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JEE Main Solutions — practice questions — page 2

Explore 80 free Solutions questions in JEE Main Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Showing questions 31–60 of 80.

Which pair forms a nearly ideal solution?Read the answer and worked solution →A solution failing Raoult's law over the full range is:Read the answer and worked solution →A vapour pressure higher than predicted means the solution shows:Read the answer and worked solution →A vapour pressure lower than predicted means the solution shows:Read the answer and worked solution →In positive deviation the A-B interactions are, against the rest:Read the answer and worked solution →In a positive deviation the molecules find it easier to:Read the answer and worked solution →A mixture of ethanol and acetone shows:Read the answer and worked solution →Acetone added to ethanol breaks some of its:Read the answer and worked solution →Carbon disulphide added to acetone gives a solution showing:Read the answer and worked solution →In negative deviation the A-B interactions are, against the rest:Read the answer and worked solution →A mixture of phenol and aniline shows:Read the answer and worked solution →Chloroform and acetone form a hydrogen bond, so the vapour pressure:Read the answer and worked solution →Binary mixtures boiling at a constant temperature are called:Read the answer and worked solution →The components of an azeotrope cannot be separated by:Read the answer and worked solution →A large positive deviation produces an azeotrope that is:Read the answer and worked solution →A large negative deviation produces an azeotrope that is:Read the answer and worked solution →Distilling an ethanol and water mixture stops at about:Read the answer and worked solution →The nitric acid and water azeotrope holds nitric acid at about:Read the answer and worked solution →True or false on solutionsRead the answer and worked solution →Positive or negative deviationRead the answer and worked solution →Match each mixture to its behaviourRead the answer and worked solution →Ideal or non-idealRead the answer and worked solution →Quick picks on solutionsRead the answer and worked solution →Why positive deviation raises pressureRead the answer and worked solution →Fill the gaps on solutionsRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →HENRY'S LAW states that at constant temperature:Read the answer and worked solution →Salt is sprinkled on icy roads in cold countries to:Read the answer and worked solution →Two are true, one is notRead the answer and worked solution →True or false: concentrationRead the answer and worked solution →

Worked practice questions

Which pair forms a nearly ideal solution?

  1. Phenol and aniline
  2. Nitric acid and water
  3. Benzene and toluene
  4. Ethanol and acetone
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Correct answer: C. Benzene and toluene

1. Benzene and toluene are chemically very alike. 2. Their A-A, B-B and A-B interactions are nearly equal. 3. So the mixture behaves almost ideally. _Source: syllabus Chemistry Part I, Chapter 2, Solutions._

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A solution failing Raoult's law over the full range is:

  1. Ideal one
  2. Azeotrope
  3. Saturated
  4. Non-ideal
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Correct answer: D. Non-ideal

1. An ideal solution obeys the law at every concentration. 2. Any departure from it makes the solution non-ideal. 3. Its vapour pressure is then higher or lower than predicted. _Source: syllabus Chemistry Part I, Chapter 2, Solutions._

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A vapour pressure higher than predicted means the solution shows:

  1. Positive deviation
  2. Negative deviation
  3. Ideal behaviour
  4. Constant boiling
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Correct answer: A. Positive deviation

1. Raoult's law gives a predicted vapour pressure. 2. The measured value here comes out above that prediction. 3. This is a positive deviation from Raoult's law. _Source: syllabus Chemistry Part I, Chapter 2, Solutions._

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