Chemistry is considered to be the most scoring subject in the JEE. But there are a few topics in Chemistry that are both easy and scoring as they take less time to solve–making them the most important topics for JEE Mains Chemistry.
If you can solve these quickly, it gives you more time for Physics and Mathematics. Chemistry makes a vast difference in ranks. Physics and Mathematics will help you make a strong score–but it is Chemistry that gets you a better rank. So let’s take a look at these important topics for JEE Mains Chemistry.
Concepts of Atoms, Molecules, and Dalton’s Atomic Theory
This topic needs to learned and memorized by heart. Direct questions are asked from it, especially from Atomic Structure in the JEE Main. In the JEE Advanced they usually test your understanding by asking twisted questions. Many students get scared seeing such questions. However, generally the solution is quite simple. This topic can be thought of as moderately difficult.
This is a general topic where your learning power is tested. Direct questions are asked from this topic. Some twisted questions are also asked. For instance, in an exam you may find problems where you are required to first find out the chemical formula of a substance based on the analysis of chemical tests performed on it.
Later, the question may extend to a mole concept question which requires knowledge of how this unknown substance reacts. You need to enhance your learning power to tackle such questions.
Balancing of Chemical Equations
This is the easiest of all the most important topics for JEE Mains Chemistry. Here, you need to apply a little bit of your understanding power. Usually, students are taught the balancing of equations from middle school, and they master the Hit and Trial Method. So, if in some case you are neither able to apply the Ion-Electron method, nor the Oxidation Method, you can go for the Hit and Trial method to see if that works. Ion-electron Method is easier than the Oxidation Method.
Heat of Reaction
This topic deals with the energy transformations in a reaction. It mainly includes the knowledge of basic formulae of the First Law of Thermodynamics, and the changes in various heats of a reaction while a state conversion takes place.
Electrolytic Conductance, Specific and Molar Conductivity, Kohlrausch’s Law
You only need to learn the basic formulae in this topic. Questions asked from this topic are simple and direct. Make sure to keep the formulae on your fingertips.
This is one of the most favorite topics of JEE aspirants because here you need not learn any of the formulae, you can simply derive by basic Integration and Differentiation. Only Arrhenius Equation needs to be memorized and direct questions will be asked on it (usually formula-based questions).
This topic requires more memorization, rather than understanding. But you will enjoy learning it because you will mostly find examples that are a part of your daily life. Freundlich Isotherm requires the most focus in this topic because you will face numerical problems from it. The problems are generally easy to solve using the graph of Freundlich Isotherm and the equation.
This is the easiest of the important topics for JEE Mains Chemistry–as well as the most difficult one! It depends on how you look at it. If you prepare it well, your JEE score will definitely be high. If you don’t prepare well, your score will likely be quite low. Yes, it can be a game-changer.
The JEE tests your memorizing power and your understanding abilities simultaneously with this topic. About 70% of inorganic chemistry requires an understanding of the inorganic reaction mechanisms. The remaining 30% includes exceptions and their reasons. You cannot neglect this 30% because usually exceptions are asked in various competitive exams.
Only direct questions can be asked from this topic, except for the Qualitative Analysis part where you need to be quite accurate in the series solving questions. The inorganic reactions, color of substances, and odor of gases should be at your fingertips.
In the chapter on coordination compounds, the theories require proper attention because complex questions may be asked based on these theories. Always revise Inorganic Chemistry on a daily or weekly basis. This will make it your greatest strength in Chemistry, allowing you to score well in it.
Organic Chemistry becomes your favorite topic when you master it. Some of the easiest topics from this subsection are:
- IUPAC nomenclature of compounds
- The electronic movements effects- +I,-I,+R,-R,+H,-H
- Aromaticity of Benzene and related compounds
- Determination of empirical formula with the help of the reactions and process given in the question. This topic basically tests your learning power. By reading the organic reactions twice or thrice, you will be able to master them.
- Structure and Stability of Carbocations, Carbo-anions and free radicals using basic concepts of General Organic Chemistry
- Hydrocarbons: Alkanes, Alkenes, and Alkynes
- You need to be thorough with the reactions of their preparation, combustion, and other chemical reactions. Quite a lot of direct questions are asked from this topic. For alkenes, Electrophilic Addition Reactions play an important role.
- Electrophilic Substitution Reactions of Benzene, Phenol, and other Aromatic compounds including Friedel-Craft Reactions, Halogenation, Nitration, and Sulphonation Reactions.
- Effects of ortho, meta, and para directing groups also need to be prepared well. This is one of the most interesting and scoring topics in the JEE syllabus.
- Named reactions like Riemann-Tiemann Reaction, Kolbe’s Reaction, and others also form a scoring portion in JEE Chemistry. The examiners can play with the substrates but only the basic concept and mechanism needs to be applied in such questions.
- Alkyl Halides, Aldehydes, and Ketones (it is a lengthy topic but easier questions are usually asked), Carboxylic Acids, and Amines.
- Alcohols and Phenols are also scoring, but the mechanisms and reactions are quite difficult to understand. However,once you master them, they can become your scoring portion in the JEE.
- Polymers: You are required to learn both the names, types, and structures well. You need to learn the basic structure including the composition. Indirect questions including the concepts of other topics may be asked in the JEE Advanced. But in the JEE Main direct questions regarding the composition, names, and structures may be asked.
- Chemistry in Everyday Life. It is one of those topics that is a part of only the JEE Main syllabus. Usually, people ignore it but it is scoring because:
- Firstly, it is a topic on the JEE Main only–so the difficulty level will not be that high.
- Secondly, only direct questions can be asked. So one needs to prepare this topic quite well because four marks can alter your rank by three to four thousand in the JEE Main.
Hence, nearly all important topics for JEE Mains Chemistry are scoring except Ionic Equilibrium and the States of Matter. There you need to be perfect in typical calculations, and be ready for a new type of question.
All the best!