One of the largest and strenuous engineering entrance examinations, JEE is conducted every year for admission into IITs, NITs and other top engineering institutes all over the country. Among the three sections in the exam, Chemistry is considered to be slightly easier wherein candidates can fetch a good score. But, for the same, rigorous practice is required.
To start with, students should be very well acquainted with JEE Main 2018 Syllabus. Having knowledge of the syllabus properly will help you identify your strengths and weak points and you will be able to spare more time to prepare sections you need to work on.
With a few months left for JEE 2018, you must know what are the most important topics in Chemistry and which areas should be focused on so that you can plan a course of study. To help you get some perspective we will be discussing 7 questions from various important topics that can be expected to appear in the JEE 2018 paper.
The chemistry section of IIT JEE is divided into three parts: Physical Chemistry, Organic Chemistry, and Inorganic Chemistry. While the syllabus is vast, a large part of the syllabus is based on conceptual learning. So it will be easier for students to attempt questions in the paper within lesser time if they have a clear understanding of the concepts.
Topics like coordination compounds, analytical chemistry, metallurgy and chemical reactions are the scoring parts in inorganic chemistry section. Questions in this section are mainly based on concepts and are quite direct. The JEE paper usually comprises of 25% to 30% of the questions from this part. Clear concepts can help you answer questions within a short time.
Some of the important concepts to focus on are Chemical bonding, VSPER, Hybridisation, DM, MOT, CFT (Coordination Compound), P-block. Questions can be expected from the following topics,
- Periodic Table and Chemical Bonding
The periodic table is an important topic as it contains all the elements and blocks like P – block, D- block, and S-block. Questions on chemical bonding were asked in all the last 4 years JEE Mains and Advanced Exams. Questions from this section can be based on finding a suitable combination of a given list of compounds according to shape and geometry.
- Coordination Compounds
Questions on coordination compounds can be based on finding the appropriate combination of unpaired electrons and magnetic moment and on the highest or lowest dipole moment.
Questions on this topic may have a list of acids, their molecular formulas and sigma and pi bonds respectively, you will be asked to find the suitable combination of various acids.
Physical Chemistry has a weightage of 30% to 40% in JEE chemistry section. It is one of the most important topics as it is imperative in developing the fundamental concepts. It analyses the physical and chemical properties of matter. JEE Physical Chemistry starts from mole concepts, quantities at the atomic level to energy, thermodynamics, and kinetics. It also covers concentration of solutions, atomic structure, and chemical equilibrium.
Previous years’ paper shows that questions on Thermodynamics and Solid states appeared frequently. Some important concepts are Entropy, Gibbs Energy, and Reactivity Series. Other important topics are – 2nd Law, Solids, Gas theory.
Numerical problems on Physical Chemistry are complex but if you have a clear understanding of the concepts you will be able to solve them easily.
Questions are expected from Chemical thermodynamics, properties of thermodynamics and equilibrium.
- Solid states and Gaseous states
Numerical questions are expected from this topic.
Organic chemistry portion covers 30% to 40% of the Chemistry paper in JEE. So, it is an extremely important topic for students. Organic Chemistry part comprises concepts of resonance, hybridization, IUPAC nomenclature, isomerism, stereoisomerism, hyperconjugation etc.
Organic Chemistry can be divided into- General Organic Chemistry and Carbonyl Compounds.
For General Organic Chemistry the important concepts to focus on are – electrophile, nucleophile, reagents, types of reactions, acidity, basicity, resonance, and isomerism.
For Carbonyl compounds the important concepts are – aldehydes, ketones, amines, and amides.
Organic Chemistry part of JEE requires practice. Topics like halides, hydrocarbons, alcohols, phenols, aldehydes and ketones, carboxylic acids are extremely important to cover.
Questions are mainly expected from,
- General Organic Chemistry – Types of Reactions
Questions involving combinations of reactants, reagents, and stereochemistry are expected.
- Carbonyl compounds
Questions will be asked on finding the suitable combination for formation o products with given list of reactants and reagents.
For JEE 2018, the chemistry section should be given utmost importance to achieve a good score and a subsequent high AIR. The syllabus is vast, but understanding the concepts and repeated practice of the numerical questions can help you solve the problems quicker. Try to solve previous years’ papers to get an idea of the trend of topics on which questions are framed every year. There is no shortcut to success, so try to cover the entire syllabus. The study focusing on the weaker sections and do not forget to revise after completing each topic.