Soul of Chemistry

  Solutions of Gateway Examinations to  IISER, NISER, JEE, NEET,   NDA, ICAR, OUAT Topic: Solution (NDA, ICAR, OUAT Level) 1. Solubility of a gas in a solvent varies directly with the prssure of the gas, inversly with the temperature of the solution and directly with the liquefiability of a gas. So all of the above are true. 2.  Calculate the amount of urea dissolved per litre if its aqueous solution is isotonic with 10% cane sugar solution. Isotonic Solutions are those having equal osmotic pressure (O.P). O.P = w R T / m V In case of Urea, w1 = ?, m1 = 60, V1 = 1 litre In case of Cane sugar, w2 = 10g, m2 = 342, V2 = 100ml = 0.1 litre Thus w1 R T / m1 V1 = w2 R T / m2 V2 Or w1 / m1 V1 = w2 / m2 .V2 Thus w1 = 17.543 g = 17.6 g 3.  If we prepare separate solutions of 2 mole urea and 2 moles NaCl in one litre water, then whose boiling point will be higher? Number of particles in NaCl solution will be greater due to ionisation hence the value of any colligative properties will be higher

  Gateway Examinations  On Various Topics of Chemistry  to  IISER, NISER, JEE, NEET,  NDA, ICAR, OUAT You need to prepare strategically, to get success in these high profile examinations. Getting concept, understanding formula, knowing deep of everything, finding shorcut answer for time management, constant effort, perseverance and feeling relaxed in the examination hall are all of equal importance.     Above all, appearing in series of equivalent mock tests is mostly necessary which will enhance your ability and confidence to crack the examinations.     Wishing you best of your ability and fortune for the upcoming examinations. Click on th links below to appear in the examinations: Click here for the exam topic: Solution   (OUAT, NDA and ICAR Level) Click Here for the Exam on Chemical Kinetics   (OUAT, NDA and ICAR Level) Click here to appear in the exam topic: Chemical kinetics - 2 (OUAT, NDA and ICAR Level) Click here to get the answers

 National Defence Academy (NDA) Entrance Examination      National Defence Academy (NDA) entrance examination is conducted for admission into Army, Navy and Air force wing.    The union public service commision (UPSC) prescribes NDA eligibility criteria when it notifies for the same.         Candidate must carefully read the eligibilty criteria before filling in the form.      Unmarried male candidates who have completed their 12 or equivalent examinationcan apply.    The eligibility criteria include nationality, age limit, educational qualification and physical standards (height, weight, visual standards ....) etc.     The application form for 2021 (II) examination is to be released on Jun 9 and will continue till Jun 21.     This Examination is conducted twice a year in two stages: the written exam and the SSB interview. Candidated who qualify in the written examination are called for the SSB interview.     The exam consists of two papers: Mathematics (120 objective questions &

NDA (National Defence Academy) Previous Year Question Papers  Click on the links and open with google drive NDA - 2021 - I - General ability test NDA - 2021 - I - Mathematics NDA - 2020 - II - GAT (General ability test) NDA - 2020 - II - Mathematics Kindly Share with your friends Picture Credit: By Clintonpeter - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=84948291