Chapterwise CBSE Chemistry Important Questions with Key Formulas Reactions and Previous Year Patterns
CBSE Chemistry Examination 2020 will be usually held in the month of March every year. The students appearing for the CBSE Chemistry Examination can go through the chapter-wise important questions, including the upcoming CBSE Chemistry Examination answers. These important questions and answers list for CBSE Chemistry is strictly based on CBSE's latest pattern.
The students of CBSE Chemistry Examination will find the important questions, and the answers list chapter-wise is very helpful for them in the last-minute preparations. The CBSE Chemistry Examination questions and answers are completely based on the NCERT Textbook, the previous year question papers, and the latest sample papers.
Preparation Tips for CBSE Chemistry
Once you get the idea about the CBSE Chemistry syllabus, it's time to know some tips that will help the students prepare for the CBSE Chemistry subject. It is advised to follow and remember each point listed below.
Go With NCERT
Firstly, complete the NCERT textbook by reading every topic given in the book. This will help the students to get an idea about the questions and topics.
Then, complete the theory part; as you know, the first 5 chapters are the numerically-based problems and the theory section. It is advised that students should complete the theory part first.
Read, learn, and solve every question from the NCERT textbook because many questions in the board exam are asked from the NCERT book directly, sometimes even without a change.
After completing the NCERT book, you can go through the Reference books for PCM and prepare for the board exam from them.
Diagrams, Graphs, Definitions, and Organic Chemistry
Practice by learning and memorizing the graphs, structures, and important diagrams, which can help you get extra 10 marks.
Learn and memorize every definition because most of the Chemistry paper consists of only definitions. If you get any doubts, clear those from your teacher's help without making any delay.
Organic chemistry is always a weak link for many students, so give some special attention to this section and learn every important name reactions. Learning name reactions from organic chemistry will help the students to score 10 marks with no doubt.
Special Notebook
Create a special and dedicated notebook, and write down every important term you find during your preparation time on that notebook. After that, focus at least 1 hour every day on revising that notebook. This will help you to retain the stuff more clearly.
Do not forget to solve the previous year's question papers and the sample papers; because this really helps you a lot. Only by solving the sample papers and previous year papers, even without going through the NCERT or other reference books, you can easily achieve more than 70 marks, which is a surprising fact.
Try to find the weak points and work on them, turning them into your stronger points. This is quite necessary to score good marks in Chemistry subjects.
Practice each question from the papers with all your focus, and do not let any question go off. Each question is really important to practice.
Important Questions on CBSE Chemistry
Important questions for CBSE Chemistry provides the students with an advanced preparation level for the Chemistry subject. As students need to prepare both for their CBSE Boards and Competitive examinations like NEET, JEE as well.
Therefore, CBSE Chemistry important questions would be helpful for them to prepare for both kinds of examinations. Students can practice these chapter-wise Important questions for CBSE Chemistry, which enables them to develop conceptual knowledge.
Let us look at a few of the Chemistry Chapters associated with the important questions.
Solid State
Solutions
Electrochemistry
Chemical Kinetics
Surface Chemistry
General Chemistry & Process of Isolation of Elements
P, D, and F Block Elements
Coordination Compounds
Haloalkanes & Haloarenes
Alcohols, Phenols & Ethers
Biomolecules, and more.
Techniques of Scoring Good Marks in CBSE Chemistry
It is common for many of the students to score good marks in the CBSE Chemistry. Let us look at the important things that should be followed to score good marks.
Write the chemical reactions wherever you can.
Give examples in the questions.
Answers all the questions precisely.
Represent the answers elegantly and avoid cuttings & overwriting.
Write the formula in numerical questions.
Prepare graphs, diagrams even when they have not been asked to be drawn.
Underline the important points in explanatory answers.
Read the questions between the lines.
Try to divide the chapters into slots, fix the number of days you will read them.
Practice the conversion in organic chemistry.
Try to solve as many examples of the textbook as you can.
FAQs on CBSE Chemistry Important Questions with Answers and Concepts
1. What are the most important chapters in CBSE Chemistry for board exams?
The most important chapters in CBSE Chemistry typically include high-weightage and concept-based units from Physical, Organic, and Inorganic Chemistry.
- Class 10: Chemical Reactions and Equations, Acids Bases and Salts, Metals and Non-metals, Carbon and Its Compounds.
- Class 11: Some Basic Concepts of Chemistry, Thermodynamics, Chemical Bonding and Molecular Structure.
- Class 12: Electrochemistry, Chemical Kinetics, Coordination Compounds, Organic Chemistry (Haloalkanes, Alcohols, Biomolecules).
2. How do you balance a chemical equation in CBSE Chemistry?
A chemical equation is balanced by ensuring the number of atoms of each element is equal on both sides of the equation according to the Law of Conservation of Mass.
- Write the correct skeletal equation.
- Count atoms of each element on both sides.
- Add coefficients to balance one element at a time.
- Recheck atom counts.
3. What is the mole concept and why is it important in CBSE Chemistry?
The mole concept states that one mole of any substance contains 6.022 × 1023 particles, known as Avogadro’s number.
- 1 mole = 6.022 × 1023 atoms, molecules, or ions.
- Molar mass (in g) equals one mole of that substance.
- Formula: Number of moles = Given mass / Molar mass.
4. What is the difference between an atom and a molecule?
An atom is the smallest unit of an element, while a molecule is the smallest unit of a substance that can exist independently.
- Atom example: He, Na, O.
- Molecule example: O2, H2O, CO2.
- Atoms combine chemically to form molecules.
5. What are the types of chemical reactions in CBSE Class 10?
The main types of chemical reactions in CBSE Class 10 are combination, decomposition, displacement, double displacement, and redox reactions.
- Combination: 2Mg(s) + O2(g) → 2MgO(s)
- Decomposition: CaCO3(s) → CaO(s) + CO2(g)
- Displacement: Zn(s) + CuSO4(aq) → ZnSO4(aq) + Cu(s)
- Double displacement: AgNO3(aq) + NaCl(aq) → AgCl(s) + NaNO3(aq)
6. What is the pH scale and how is it calculated?
The pH scale measures the acidity or basicity of a solution and is calculated as pH = −log[H+].
- pH < 7: Acidic solution.
- pH = 7: Neutral solution.
- pH > 7: Basic solution.
7. What is the difference between exothermic and endothermic reactions?
An exothermic reaction releases heat, while an endothermic reaction absorbs heat from the surroundings.
- Exothermic example: CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) + heat
- Endothermic example: CaCO3(s) → CaO(s) + CO2(g)
8. How do you calculate molarity in Chemistry?
Molarity (M) is defined as the number of moles of solute per litre of solution, given by M = moles of solute / volume in litres.
- Step 1: Calculate moles = Given mass / Molar mass.
- Step 2: Convert volume to litres.
- Step 3: Substitute into the formula.
9. What is a redox reaction with an example?
A redox reaction is a reaction in which oxidation and reduction occur simultaneously.
- Oxidation: Loss of electrons.
- Reduction: Gain of electrons.
10. What is the difference between ionic and covalent bonds?
An ionic bond is formed by transfer of electrons, while a covalent bond is formed by sharing of electrons between atoms.
- Ionic example: NaCl (Na+ and Cl-).
- Covalent example: H2O (shared electron pairs).
- Ionic compounds usually have high melting points and conduct electricity in molten state.
- Covalent compounds generally have lower melting points and poor electrical conductivity.
