Analysis of JEE 2015 Exam

 

Chemistry

 

  • Most of the questions in Inorganic and Organic Chemistry were straight from our notes.
  • Most of the Inorganic Chemistry questions did not require any working. They were simply knowledge based.
  • Question 4 required a bit of working and candidates who have not encountered such questions before may get it wrong. This is only question that is step 3 intensive.
  • For Organic Chemistry, about 3 questions (Q 1, 2 and 3) required some working, but even these should not be considered too difficult. These were step 2 intensive, that is, they relied more on concepts than on working.
  • Most of the Physical Chemistry questions were straightforward and the use of simple logic would have helped. Even the questions that required some working were relatively simple.

Question & Answers – Chemistry

 

Physics

 

  • The Physics questions were on the whole tougher than in previous years.
  • Some questions brought together ideas that were rarely found together in earlier papers.
    • An example is Q10, which linked Simple Harmonic Motion and Elasticity.
    • Another is Q14, which linked Magnetism and Newton’s Laws.
  • Clever use of approximations could have simplified some questions, like Q13 and some reasoning could have solved or simplified other questions, like Q14-16.
  • Candidates who were not conceptually strong would have struggled with such questions.

Question & Answers – Physics

 

Mathematics

 

  • The Mathematics questions was also tougher than in previous years.
  • In fact, some of them were significantly tougher, like the highly conceptual Q20 that linked a minor point of Limits and Applications of Derivatives and Q19, which has a lengthy brute force solution, but which unravels easily with the recognition that the curve is a Pair of Lines.
  • Q22, which converted a family of lines to a locus problem on mirrors was also conceptually deep as was Q24 on distribution of identical items in identical containers.

Question & Answers – Mathematics