NDA Chemistry Syllabus – Chapter Wise Weightage, Important Topics

By BYJU'S Exam Prep

Updated on: September 11th, 2023

The NDA Chemistry section of the exam consists of 15 questions that total up to 60 marks under the General Ability Test. For effective preparation for the NDA Chemistry Syllabus of exam, here are some expert tips. So, understand how to prepare the NDA Chemistry syllabus with the help of this post now to score 10+ questions from this section. We have also covered the important topics of NDA Chemistry for the exam based on the previous year’s papers.

NDA Chemistry Syllabus

The UPSC designed the NDA Chemistry Syllabus, which covers a variety of topics including physical and chemical processes, elements, compounds, etc. The NDA Chemistry section of the exam tests your understanding of fundamental chemistry concepts and different substances. The following topics from the Chemistry section of the NDA Exam should be taken into consideration while you prepare.

In the NDA Chemistry section, the following topics are usually given more weightage:

  • Carbon and its various forms
  • Atom and structure of an atom
  • Acids, bases, and salts
  • Metals and non-metals
  • Preparation and properties of hydrogen, oxygen, and carbon dioxide.
  • Atomic equivalent
  • Physical and chemical changes
  • Oxidation and reduction
  • Mole concept
  • P block elements
  • Properties of air and water
  • Elements, mixtures & compounds
  • Molecular weights
  • Valency
  • Chemical formulae and equations
  • Laws of chemical combination
  • Preparation of soap, glass, ink, paper, cement, etc.
  • Fertilizer and their types
  • States of matter
  • Dual nature of matter
  • VSEPR theory
  • Transference of heat (rate of reaction, factors affecting the rate of reaction, rate expression, mechanism of reaction)
  • Different types of solutions
  • Laws of thermodynamics
  • Laws of chemical combination
  • Hydrocarbons
  • Redox reactions in aqueous solutions
  • Colligative & periodic properties
  • Mendeleev’s periodic table
  • Types of elements.

Tips to Prepare Basic Concepts of NDA Chemistry

The following are some tips to prepare basic concepts of the NDA Chemistry syllabus:

  • Understand the concepts rather than memorize them.
  • Divide your preparation time topic-wise and stick to one topic at a time.
  • Almost all past candidates feel that the questions asked are easier as compared to the X and XII boards.
    So, stick to the basic concepts of all topics.
  • You should also have basic knowledge of the classification of elements, compounds, and mixtures.

Chemical Formulae and Equations in NDA Chemistry

Make short notes of all chemical formulae and simple equations from the NDA Chemistry syllabus in such a way that it is easier to refer to them during last-minute revisions. You can make notes of chemical formulae as follows:


Chemical Name

Common Name


Aluminum Oxide



Nitric Acid

Aqua Fortis


Sodium Bicarbonate

Baking Soda


Sodium Chloride

Brine / Rock Salt


Ammonium Hydroxide

Ammonia Water


Calcium Hypochlorite

Bleaching Powder


Di-Hydrate Aluminum Oxide



Calcium Carbonate



Hepta-Hydrate Magnesium Sulphate

Epsom Salt


Calcium Fluoride


The general formula for different series of hydrocarbons is given below:


General Formula







Alcohol and Ether


Aldehyde and Ketone


Acid and Ester


Balancing of Chemical Equations in NDA Chemistry

Learn how to balance chemical equations. When it comes to chemical equations, the number of atoms of each element on the LHS (called as reactants) should be equal to the number of atoms of each element on the RHS (called as products) for each element. To balance it, we need to add coefficients accordingly.

Take the following equation for instance,

N2 + H2 ——> NH3

Here, the reactants are N2 and H2 and the product is NH3. The equation, however, is not balanced as the number of atoms of N are 2 on the LHS and 1 on the RHS. Similarly, the number of atoms of H are 2 on the LHS and 3 on the RHS. Hence, we need to add a coefficient on both the sides. If we add the coefficient 3 before and 2 before NH3, we achieve a balanced equation where the number of atoms of N is 2 and the number of atoms of H is 6.

N2 + 3H2 ——> 2NH3

This concept is known as balancing of equations. It is quite simple, and the underlying concept should be understood rather than trying to remember different equations.

Preparation and Properties of Hydrogen in NDA Chemistry

Hydrogen can be prepared using many methods. The basic formula applied in each method is listed below. In a similar manner, learn about the preparation and properties of carbon dioxide and oxygen. In all cases, you only need to have a general idea about the compounds involved, the chemical equation, and the process.

A few important properties of hydrogen are:

  • It is a colorless and odorless gas.
  • It is particularly important in a number of acid-base reactions.
  • It is used abundantly in the processing of fossil fuels as well as ammonia production.
  • Its melting point is -259.2o
  • Its boiling point is -252.87° C.

The methods for the preparation of Hydrogen are:

  • Method 1 – By the action of dilute strong acid on metals such as zinc
    Zn + H2SO4 ——–> ZnSO4 + H2
  • Method 2 – By the reaction between an amphoteric metal and a strong base
    2Al + 6NaOH + 6H2O ——-> 2Na3 [Al(OH)6]3 + 3H2
  • Method 3 – By electrolysis of water
    2 H2O ——-> 2H2 + O2

Preparation Methods for Other Substances in NDA Chemistry

You should also know about the preparation method for substances or products like soap, ink, glass, paper, cement, etc., in NDA Chemistry. You need not have in-depth knowledge of each preparation method and must prepare only the chemical equation involved and a gist of the procedure.

When it comes to the preparation of such substances, the questions asked are direct and no extra information is usually required.

Books to Prepare NDA Chemistry Syllabus

A majority of past candidates feel that the NDA Chemistry section is easier to prepare from NCERT class IX and X Science and XI and XII Chemistry textbooks. Alternatively, you can also buy books from private publications or other authors such as NDA Chemistry Chapter Wise Summary by H L Walia.

Also, check:


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