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CBSE Class 12 Chemistry MCQs

By Brijesh Sharma

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Updated on 29 Aug 2025, 17:16 IST

Chemistry is an important subject in the CBSE Class 12 Chemistry Syllabus as it explains many concepts that are useful for both cbse board exam and competitive exams. For students preparing for the Class 12 board exam, practicing objective questions becomes very important because it improves understanding and speed. That is why solving CBSE Class 12 Chemistry MCQs is one of the best ways to revise and remember important topics.

The MCQs are made from NCERT textbook chapters and are closely linked with the NCERT Solutions for Class 12 Chemistry. Many questions in exams come directly or indirectly from these chemistry chapters, so solving them builds confidence. Students can use chemistry class 12 mcqs all chapters pdf for complete practice and also go for class 12 chemistry mcq pdf download to study offline anywhere.

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CBSE Class 12 Chemistry MCQs Chapter wise

Practicing NCERT Chemistry Class 12 MCQ questions with answers is really one of the most effective ways to get ready for the CBSE Class 12 board exam. Consistent practice is always key, because just reading theory is not enough if you want to understand concepts deeply or score higher marks. When students solve more and more Class 12 Chemistry MCQs with answers PDF download, it helps them improve class 12 board exam score and learn the chemistry topics concepts.

CBSE Class 12 Chemistry MCQs Chapters List
Chapter 1 The Solid State MCQs
Chapter 2 Solutions MCQs
Chapter 3 Electrochemistry MCQs
Chapter 4 Chemical Kinetics MCQs
Chapter 5 Surface Chemistry MCQs
Chapter 6 General Principles and Processes of Isolation of Elements MCQs
Chapter 7 The p-Block Elements MCQs
Chapter 8 The d-and f-Block Elements MCQs
Chapter 9 Coordination Compounds MCQs
Chapter 10 Haloalkanes and Haloarenes MCQs
Chapter 11 Alcohols, Phenols and Ethers MCQs
Chapter 12 Aldehydes, Ketones and Carboxylic Acids MCQs
Chapter 13 Amines MCQs
Chapter 14 Biomolecules MCQs
Chapter 15 Polymers MCQs
Chapter 16 Chemistry in Everyday Life MCQs

Top 50 MCQs CBSE Class 12th Chemistry Exam with Answers

Ques: Which ligand causes the highest crystal field splitting?

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a) CN⁻

b) Cl⁻

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c) H₂O

d) OH⁻

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Ans: (a) CN⁻

Ques: Which of the following is used as an antiseptic?

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a) Benzene

b) Phenol

c) Ethanol

d) Ether

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Ans: (b) Phenol

Ques: Van’t Hoff factor (i) for K₂SO₄ in water is:

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a) 1

b) 2

c) 3

d) 4

Ans: (c) 3

Ques: The bond between two amino acids in a protein is called:

a) Glycosidic bond

b) Peptide bond

c) Phosphodiester bond

d) Hydrogen bond

Ans: (b) Peptide bond

Ques: Which electrolyte is used in a dry cell?

a) H₂SO₄

b) KOH

c) NH₄Cl

d) NaOH

Ans: (c) NH₄Cl

Ques: Glucose is an example of:

a) Disaccharide

b) Monosaccharide

c) Polysaccharide

d) Protein

Ans: (b) Monosaccharide

Ques: Which reagent is used to distinguish between alcohols and phenols?

a) Fehling’s solution

b) Iodoform test

c) Neutral FeCl₃

d) Lucas reagent

Ans: (c) Neutral FeCl₃

Ques: Which element is not a transition metal?

a) Fe

b) Zn

c) Cr

d) Mn

Ans: (b) Zn

Ques: What is the product of the reaction between aniline and bromine water?

a) o-Bromoaniline

b) p-Bromoaniline

c) 2,4,6-Tribromoaniline

d) Aniline does not react with bromine water

Ans: (c) 2,4,6-Tribromoaniline

Ques: Which nucleic acid is responsible for protein synthesis?

a) DNA

b) tRNA

c) rRNA

d) Both (b) and (c)

Ans: (d) Both (b) and (c)

Ques: The Arrhenius equation represents the effect of ______ on reaction rate.

a) Catalyst

b) Temperature

c) Pressure

d) Concentration

Ans: (b) Temperature

Ques: Freons are mainly used as:

a) Antiseptics

b) Refrigerants

c) Fertilizers

d) Medicines

Ans: (b) Refrigerants

Ques: Which of the following undergoes nucleophilic substitution reaction most easily?

a) Benzyl chloride

b) Vinyl chloride

c) Chloroethane

d) Chlorobenzene

Ans: (a) Benzyl chloride

Ques: Which is a bidentate ligand?

a) NH₃

b) C₂O₄²⁻

c) CN⁻

d) Cl⁻

Ans: (b) C₂O₄²⁻

Ques: Which amine reacts with Hinsberg reagent to form a soluble product?

a) Primary amine

b) Secondary amine

c) Tertiary amine

d) Quaternary ammonium salt

Ans: (a) Primary amine

Ques: Which of the following undergoes the iodoform test?

a) Benzaldehyde

b) Acetone

c) Formaldehyde

d) Ethanol

Ans: (b) Acetone

Ques: Which law governs the solubility of gases in liquids?

a) Henry’s law

b) Raoult’s law

c) Dalton’s law

d) Boyle’s law

Ans: (a) Henry’s law

Ques: Phenol is more acidic than ethanol because:

a) Phenoxide ion is resonance stabilized

b) Ethoxide ion is resonance stabilized

c) Both are equally acidic

d) Phenol does not release H⁺ ions

Ans: (a) Phenoxide ion is resonance stabilized

Ques: Which of the following statements is true for a galvanic cell?

a) Oxidation occurs at the cathode

b) Reduction occurs at the anode

c) Electrons flow from the anode to the cathode

d) Anode is positive

Ans: (c) Electrons flow from anode to cathode

Ques: Which of the following is a primary cell?

a) Lead storage battery

b) Fuel cell

c) Dry cell

d) Nickel-cadmium cell

Ans: (c) Dry cell

Ques: What is the functional group of carboxylic acids?

a) –OH

b) –COOH

c) –CHO

d) –CO–

Ans: (b) –COOH

Ques: Which law is used to determine the mass of a substance deposited during electrolysis?

a) Henry’s law

b) Faraday’s law

c) Raoult’s law

d) Nernst equation

Ans: (b) Faraday’s law

Ques: What is the standard electrode potential of the hydrogen electrode?

a) 0.00 V

b) 1.00 V

c) -0.76 V

d) 0.34 V

Ans: (a) 0.00 V

Ques: Which of the following is a radioactive element?

a) Ce

b) U

c) La

d) Y

Ans: (b) U

Ques: Which reagent is used to convert nitrobenzene into aniline?

a) LiAlH₄

b) Zn/HCl

c) K₂Cr₂O₇

d) NaOH

Ans: (b) Zn/HCl

Ques: Which of the following has the highest boiling point?

a) Alcohol

b) Aldehyde

c) Ketone

d) Ether

Ans: (a) Alcohol

Ques: The rate of reaction is affected by:

a) Temperature

b) Concentration

c) Catalyst

d) All of these

Ans: (d) All of these

Ques: DDT is a:

a) Polymer

b) Pesticide

c) Antibiotic

d) Fuel

Ans: (b) Pesticide

Ques: Which of the following is a colligative property?

a) Surface tension

b) Osmotic pressure

c) Viscosity

d) Density

Ans: (b) Osmotic pressure

Ques: Which of the following is NOT a polysaccharide?

a) Starch

b) Glycogen

c) Cellulose

d) Sucrose

Ans: (d) Sucrose

Ques: Half-life of a first-order reaction is:

a) Proportional to initial concentration

b) Independent of initial concentration

c) Inversely proportional to initial concentration

d) Depends on pressure

Ans: (b) Independent of initial concentration

Ques: KMnO₄ is used as:

a) Reducing agent

b) Oxidizing agent

c) Both

d) None

Ans: (b) Oxidizing agent

Ques: Which type of deviation is shown by ethanol and water mixture?

a) Positive

b) Negative

c) No deviation

d) None of these

Ans: (a) Positive

Ques: Which test is used to distinguish between aldehydes and ketones?

a) Lucas test

b) Tollens’ test

c) Fehling’s test

d) Both (b) and (c)

Ans: (d) Both (b) and (c)

Ques: Which of the following will undergo SN1 reaction most easily?

a) CH₃Cl

b) (CH₃)₃CBr

c) CH₃CH₂Br

d) CH₃CH₂Cl

Ans: (b) (CH₃)₃CBr

Ques: Which of the following is a secondary amine?

a) NH₃

b) CH₃NH₂

c) (CH₃)₂NH

d) (CH₃)₃N

Ans: (c) (CH₃)₂NH

Ques: Which of the following is a chelating ligand?

a) CN⁻

b) EDTA

c) NH₃

d) Cl⁻

Ans: (b) EDTA

Ques: Which of the following is a transition element?

a) Ca

b) Sc

c) Na

d) K

Ans: (b) Sc

Ques: Which of the following is used as an anaesthetic?

a) CHCl₃

b) CCl₄

c) CH₂Cl₂

d) CF₂Cl₂

Ans: (a) CHCl₃

Ques: Which of the following amines is most basic?

a) NH₃

b) CH₃NH₂

c) C₆H₅NH₂

d) (C₂H₅)₂NH

Ans: (d) (C₂H₅)₂NH

Ques: Lanthanide contraction is due to:

a) Poor shielding by 4f electrons

b) High nuclear charge

c) Both (a) and (b)

d) None of these

Ans: (c) Both (a) and (b)

Ques: The reduction of aldehydes leads to the formation of:

a) Alcohols

b) Ketones

c) Carboxylic acids

d) Esters

Ans: (a) Alcohols

Ques: Which compound is commonly known as wood spirit?

a) Ethanol

b) Methanol

c) Phenol

d) Glycerol

Ans: (b) Methanol

Ques: Which of the following is an essential amino acid?

a) Glycine

b) Alanine

c) Lysine

d) Proline

Ans: (c) Lysine

Ques: Which theory explains the colour and magnetic properties of coordination compounds?

a) VBT

b) Crystal field theory

c) Molecular orbital theory

d) Band Theory

Ans: (b) Crystal field theory

Ques: What is the unit of molality?

a) mol/L

b) mol/kg

c) g/L

d) kg/mol

Ans: (b) mol/kg

Ques: Activation energy is the:

a) Minimum energy required for a reaction to occur

b) Maximum energy required for a reaction

c) Energy of the reactants

d) Energy of the products

Ans: (a) Minimum energy required for a reaction to occur

Ques: What is the unit of rate constant for a first-order reaction?

a) s⁻¹

b) mol L⁻¹ s⁻¹

c) L mol⁻¹ s⁻¹

d) L² mol⁻² s⁻¹

Ans: (a) s⁻¹

Ques: Which of the following is a colligative property?

a) Surface tension

b) Osmotic pressure

c) Viscosity

d) Density

Ans: (b) Osmotic pressure

Ques: Which of the following is a transition element?

a) Ca

b) Sc

c) Na

d) K

Ans: (b) Sc

Tips to Solve Class 12 Chemistry MCQs & Benefits of Solving Them

For many students, Chemistry seems tough because it includes both numerical problems and theory-based concepts. Practicing Class 12 Chemistry MCQs is one of the smartest ways to overcome this challenge. Multiple Choice Questions are short, but they test your depth of knowledge. Below are some useful tips:

  1. Revise NCERT first – Most CBSE Class 12 Chemistry MCQs come directly from the NCERT Solutions for Class 12 Chemistry. Before practicing MCQs, revise all the chapters from NCERT, especially reactions and definitions.
  2. Understand, don’t memorize only – Many students try to mug up reactions, but in MCQs, questions can twist the order. Always try to understand the mechanism of reactions, trends in periodic table, and reasoning behind physical chemistry formulas.
  3. Practice with timer – The Class 12 board exam and competitive exams like NEET or JEE give limited time. So, when you solve chemistry class 12 MCQs all chapters pdf, try to set a timer. It will help improve both speed and accuracy.
  4. Use elimination method – When confused between options, cancel out the wrong ones first. This increases your chance of getting the right answer even if you are not 100% sure.
  5. Solve chapter-wise MCQs – Go topic by topic. For example, practice Solid State, Electrochemistry, Surface Chemistry, and then move to Organic Chemistry. Using class 12 chemistry mcq pdf download, you can cover each chapter step by step.
  6. Check solutions regularly – After solving, always check with solved MCQs of Chemistry Class 12. Learning from mistakes is more powerful than reading notes again and again.

Benefits of Solving Class 12 Chemistry MCQs

Solving MCQs is not just about practice, it actually changes the way students prepare for exams. Let’s see the benefits:

  1. Quick Revision of Syllabus – MCQs cover the entire CBSE Class 12 Chemistry syllabus in a compact way. By solving objective type questions, you revise multiple chapters in less time.
  2. Boosts Confidence – When students solve more and more questions, they start feeling confident. Regular practice reduces exam fear and increases problem-solving ability.
  3. Improves Speed and Accuracy – The board exam and competitive exams require fast answering. Practicing MCQs trains your brain to think quickly and reduce silly mistakes.
  4. Conceptual Clarity – MCQs are often designed to test small tricky points, like exceptions in chemical reactions, or logic in inorganic chemistry. This forces students to go deeper and understand, not just memorize.
  5. Helpful for Competitive Exams – Exams like JEE, NEET, and AIIMS have heavy weightage of MCQs. Practicing Class 12 Chemistry MCQs with answers PDF not only prepares you for boards but also gives a head-start in entrance exams.
  6. Instant Self-Assessment – With chapter-wise solved MCQs, students can instantly check where they are weak. This self-analysis helps in making the preparation strategy more effective.

Conclusion, Practicing CBSE Class 12 Chemistry MCQs is one of the best ways to revise concepts, increase speed, and reduce exam stress. Whether you use class 12 chemistry mcq pdf download or practice online tests, regular solving of MCQs is like a secret weapon for scoring high marks. In simple words, more practice = more confidence = better result.

MCQs for Class 12 Chemistry FAQs

What are CBSE Class 12 Chemistry MCQs?

CBSE Class 12 Chemistry MCQs are objective type questions designed from the NCERT Class 12 Chemistry syllabus. They test a student’s understanding of concepts, reactions, and numerical problems in a simple multiple-choice format.

Why should I practice Class 12 Chemistry MCQs?

Practicing CBSE Class 12 Chemistry MCQs improves speed, accuracy, and conceptual clarity. It also helps students prepare for both the Class 12 board exam and competitive exams like JEE or NEET.

Where can I find Chemistry Class 12 MCQs all chapters PDF?

Students can download chemistry class 12 MCQs all chapters PDF from Infinity Learn website and study resources. Many of these files are available free for class 12 chemistry MCQ PDF download, making them easy to study offline.

Are NCERT Solutions useful for Chemistry MCQs?

Yes, most MCQs are based directly on NCERT textbooks. Practicing NCERT solutions for Class 12 Chemistry ensures that students cover important exam-oriented concepts.

How do solved Chemistry MCQs help in preparation?

Solved MCQs of Chemistry Class 12 allow students to check correct answers instantly, learn from mistakes, and strengthen weak areas. This self-assessment improves confidence before exams.