CBSE Class 12th Important Topics 2025

Did you know that every year 21 lakh students appear for CBSE Class 12 exams, out of which 70% of students score average or below average marks? This situation is frightening as Class 12 is a crucial year; it decides a child’s academic future. This 70% of students either drop their year or go to some average college. While most would agree that the stats sound alarming, you need to ask yourself, Do you have it in you to gain an edge over the others and seal your chances of smashing your ultimate dream?

If yes, then you are on the right page. Here, at Embibe, we provide problems with solutions for you so that you don’t have to do the extra labour and can focus entirely on your studies. 

Update: Get List of Best Practice Questions and CBSE Class 12 Mock Tests Here

Through this article, students will learn about all the important topics of the subjects and find links to access them. Embibe provides AI-Integrated learning with 3-D videos, 1000+ practice papers and mock tests, with over 19 million students accessing these daily.

If you want to be a part of the tribe and improve your scores by understanding the important topics and questions for Class 10, continue reading. 

CBSE Class 12 Important topics

With the exams approaching, it’s essential to start your preparation smartly. Before starting any preparation, it’s mandatory to know the important topics of the subjects. Through this article, students will learn about the topics and concepts covered in each subject. 

CBSE Class 12 Important topics: Physics

Students can find the important topics for CBSE Class 12 Physics in the table below. Students can use this table for their reference. 

CBSE Class 12 Important topics: Chemistry

Students can find the important topics for CBSE Class 12 Chemistry in the table below.

CBSE Class 12 Important topics: Biology

Students can find the important topics for CBSE Class 12 Biology in the table below.

CBSE Class 12 Important topics: Mathematics

Given below are the important topics for CBSE Class 12 Maths for student’s reference.

CBSE Class 12 Important Questions: Physics

During the last minute preparation, it is quite helpful to solve important questions for every topic. Solving important questions gives you an idea of how the question paper might be and what topics to focus on more. At Embibe, students can find more than 1000 sample papers and 500+ mock tests for every chapter to have a strong hold on the topic. Let us witness a few important questions of Class 12 Physics.

Q.1: Define the term electric dipole moment of a dipole. State its S.I. unit

Ans: τ = OE sin θ

If E = 1 unit, θ = 90°, then τ = P

Dipole moment may be defined as the torque acting on an electric dipole, placed perpendicular to a uniform electric dipole, placed perpendicular to a uniform electric field of unit strength.

or Strength of the electric dipole is called the dipole moment.

|

P

→

|=𝑞|2𝑎|

∴ SI unit is Cm.

Q.2: Name the physical quantity whose S.I. unit is JC-1. Is it a scalar or a vector quantity? 

Ans: Physical quantity whose S.I. unit JC-1 is Electric potential. It is a Scalar quantity.

For more such questions and solutions, Click Here.

CBSE Class 12 Important Questions: Chemistry

Given below are some important questions for CBSE Class 12 Chemistry. Students can use these questions for their reference.

Q.1: Which point defect in crystals does not alter the density of the relevant solid?

Ans: Frenkel defect.

Q.2: Which point defect in its crystal units increases the density of a solid?

Ans: Metal excess defect increases the density of a solid. It is due to the presence of extra cations in the interstitial sites.

For more such questions with their answers, Click Here.

CBSE Class 12 Important Questions: Biology

Given below are some important questions for CBSE Class 12 Biology. 

Q.1: Write the name of the organism that is referred to as ‘Terror of Bengal’. 

Ans: Water hyacinth is referred to as the ‘Terror of Bengal’.

Q.2: Give one example of a plant that reproduces by

(i) runner

(ii) offset

Ans: Below are is the example of a plant that reproduces by

(i) runner – Oxalis

(ii) offset -Pistia

Students can find more such questions Here.

CBSE Class 12 Important Questions: Mathematics

Given below are some important questions for CBSE Class 12 Mathematics. Students can use this as reference.

Q.1: Let R is the equivalence relation in the set A = {0,1, 2, 3, 4, 5} given by R = {(a, b) : 2 divides (a – b)}. Write the equivalence class [0]. 

Ans: Given, R = {(a, b):2 divides(a – b)}

and A = { 0,1, 2, 3, 4, 5}

Clearly, [0] = {b ∈ A : (0, b) ∈ R}

= {b ∈ A: 2 divides (0 – b)}

= {b ∈ A : 2divides (-b)} = {0, 2, 4}

Hence, the equivalence class of [0] = {0,2,4}. 

Q.2: If f : R → R is defined by f{x) = 3x + 2, then define f[f(x)].

Ans: Given, f(x) = 3x + 2

f[f(x)] – f(3x + 2) = 3 (3x + 2) + 2

= 9x + 6+ 2= 9x + 8

Students can find more maths questions with solutions by clicking Here.

Virtual CBSE Class 12 Practicals on Embibe Lab Experiments

Understanding the practical concepts of a topic is important to gain a thorough understanding of it. Students can do virtual experiments anytime, anywhere, on their smartphones. Embibe Lab Experiments app lets students perform experiments online for the practical topics of CBSE Class 12 Biology, Physics and Chemistry. Thus, students can also score maximum marks in their Class 12 board practical exams.

Embibe Lab Experiments for CBSE Class 12 Physics

Physics is practical subject and students need to understand them for a proper command on any topic. They can now perform practicals virtually on the Embibe Lab Experiments app for 54 topics from their CBSE Class 12 Physics syllabus. Click on the below links to access practicals on CBSE Class 12 Physics topics.

Click Here for Embibe Lab Experiments for CBSE Class 12 Physics

CBSE Class 12 Chemistry Embibe Lab Experiments

CBSE Class 12 Chemistry practicals include topics on organic, inorganic, and physical chemistry. Students can do virtual experiments for 67 topics on the Embibe Lab Experiments app. Click on the links below to access the app on your smartphone.

Click Here for Embibe Lab Experiments for CBSE Class 12 Chemistry

Embibe Lab Experiments for CBSE Class 12 Biology

Students can obtain in-depth understanding in the CBSE Class 12 Biology concepts by performing virtual experiments on 32 topics. Download and sign up on the Embibe Lab Experiments app to start experimenting. 

Click Here for Embibe Lab Experiments on CBSE Class 12 Biology

FAQs on CBSE Class 12 Important Topics