Class 12 Chemistry Sample Paper 2025 with Solutions, Download PDF

Chemistry is one of the most crucial subjects in the Class 12 Science curriculum. Preparing well for the chemistry paper will be beneficial for both boards as well as various UG Entrances.  Whether applying for engineering examinations like JEE Main or medical exams like NEET, the Chemistry board exam results are usually taken into account. As a result, after completing the syllabus, it is critical to prepare for the Chemistry paper with the Class 12 Chemistry Sample Paper 2025. So, for the convenience of students, we have included a wide collection of the Chemistry Class 12 sample paper PDF with detailed Solutions

Class 12 Chemistry Sample Paper 2025

CBSE, ICSE and Several State Board releases the subject-wise class 12 before starting the session. The purpose of publishing these sample papers is to aware to the students about the pattern and scheme of the exam. The chemistry question paper 2024 class 12 with solutions can help students understand the 12th board examination structure, question kinds, answer options, exam difficulty level, and other elements. Students must review and solve the entire Class 12 Chemistry Sample Paper 2024 to practice answering questions, comprehending paper patterns, and assessing their preparedness for the next CBSE Class 12 Chemistry Exam.

CBSE Class 12 Chemistry Sample Paper PDF Download

The Central Board of Secondary Education releases the Class 12 Chemistry sample paper along with other subjects before or mid of thievery academic session. If you are a student from the CBSE Board, then, these chemistry class 12 sample papers will help to figure out the how paper is arrangement, the types of questions based in previous sessions, difficulty level and many other insights. Here we have compiled the last few years’ official CBSE Class Chemistry Sample papers PDF along with their answers in the table.

Class 12 Chemistry Sample Paper Pattern

Before Attempting the sample paper students should carefully go through the Class 12 Chemistry paper pattern for a better grasp of the marking scheme.

1.  There are 35 questions in this question paper with internal choice.
2.  SECTION A consists of 18 multiple-choice questions carrying 1 mark each.
3.  SECTION B consists of 7 very short answer questions carrying 2 marks each.
4. SECTION C consists of 5 short answer questions carrying 3 marks each.
5. SECTION D consists of 2 case-based questions carrying 4 marks each.
6. SECTION E consists of 3 long answer questions carrying 5 marks each.
7. All questions are compulsory.
8.  The use of log tables and calculators is not allowed

Also Check:

• CBSE Class 12 Physics Sample Paper with Solutions
• CBSE Class 12 Biology Sample Paper with Solutions

Chemistry Sample Paper 2025 Class 12 by Adda247

After analysing several boards’ last few year’s papers, Our Expert faculty team provides you with the Class 12 Chemistry Sample paper 205 with the solution on this page. This Chemistry class 12 Sample paper follows the exact board’s sample paper as well as the syllabus. Students may start the preparation of Chemistry exam preparation the Adda247’s Class 12 Chemistry Sample Paper 2024 PDF given below.

CBSE 12 Chemistry Sample Paper 2025 PDF Download

Class 12 Chemistry Sample Paper 2025 with Solutions

The following questions in Section A are multiple-choice with a single correct answer. Each question is worth one mark. There are no internal options in this section.

SECTION A

The following questions are multiple-choice questions with one correct answer. Each question carries 1 mark. There is no internal choice in this section.

Q1. The boiling point of an azeotropic mixture of water and ethanol is less than that of water and ethanol. The mixture shows
(a) No deviation from Raoult’s Law.
(b) Positive deviation from Raoult’s Law.
(c) Negative deviation from Raoult’s Law.
(d) That the solution is unsaturated.

Ans. (b)
Sol. The mixture shows positive deviations from Raoult’s law. Positive deviations from Raoult’s law are noticed when
(i) Exp. value of vapour pressure of mixture is more than calculated value.
(ii) Exp. value of b.pt. of mixture is less than calculated value.
(iii) Δ_mixing =+ve
(iv) ΔV_mixing = +ve

Q2. Which has the lowest boiling point at 1 atm pressure?
(a) 0.1 M KC
(b) 0.1 M Urea
(c) 0.1 M CaCl₂
(d) 0.1 M AlCl₃

Ans. (b)
Sol. as the concentration of all the three compounds are the same, the boiling point will be compared by using the Van’t Hoff factor.
The Van’t Hoff factor for the compounds will be as below
KCl : 2
Urea : 1
AlCl₃​ : 4
So the lowest  Van’t Hoff factor  is of urea and therefore it will have the lowest boiling point.

Q3. Standard solution of KNO₃ is used to make a salt bridge because
(a) Velocity of K⁺ is greater than that of NO^3-
(b) Velocity of NO₃^– is greater than that of K⁺.
(c) Velocity of both K⁺ and NO₃^– are nearly same
(d) KNO₃ is highly soluble in water.

Ans. (c)
Sol. For a good salt bridge, the velocities of ions should be same. If the velocities are not same, then the ions would not be able to neutralize the charge equally in both half cells. Consequently, an opposite force would be developed that restricts the flow of current. For KNO₃, the velocities of K⁺ and NO₃^– are nearly same. Therefore, it is used to make salt bridges.
Q4. Galvanised iron sheets are coated with:
(a) Carbon
(b) Copper
(c) Zinc
(d) Nickel
Ans. (c)
Sol. Galvanization is the process of applying a protective zinc coating to steel or iron in order to prevent it from rusting.

Q5. In chemical equation H_{2 (g)} + I_{2 (g)} ⇌ 2HI _(g) the equilibrium constant Kp depends on:
(a) Total pressure
(b) Catalyst used
(c) Amount of H₂ and I₂
(d) Temperature

Ans. (d)
Sol. For the reaction, H₂ (g)+I₂(g)⇌2HI(g), the number of moles of gaseous reactants is equal to the number of moles of gaseous products. The equilibrium constant K_p is independent of (A) Total pressure
(B) Catalyst
(C) The amounts of H₂ and I₂ present
However, it changes with Temperature

Q6. A reaction in which reactants (R) are converted into products (P) follows second order kinetics. If concentration of R is increased by four times, what will be the increase in the rate of formation of P?
(a) 9 times
(b) 4 times
(c) 16 times
(d) 8 times
Ans. (c)
Sol. R→P
For a second order reaction, rate =k[R]²
If conc. of R is increased by four times, rate =k[4R]²
Hence, the rate of formation of P increases by 16 times

Q7. In which of the following pairs, both the ions are coloured in aqueous solutions?
(a) Sc^3+, Ti
(b) Sc³⁺, CO²⁺
(c) Ni²⁺, Cu⁺
(d) Ni²⁺, Ti³⁺
[Atomic no of Sc = 21, Ti = 22, Ni = 28, Co = 27, Cu = 29]

Ans. (d)
Explanation:
(d) Ni²⁺, Ti³⁺ are coloured due to presence of unpaired electrons.

Q8. The number of moles of KMnO₄ that will be needed to react with one mole of SO₃^2- in acidic solution are:
(a) 1
(b) 3/5
(c) 4/5
(d) 2/5

Ans. (d)
Explanation:
(d) 2 MnO₄^– + 5SO₃^2- + 16H⁺ → 2Mn²⁺ + 5SO₄²⁺ + 8H₂O
5 moles of SO₃^2- needs 2 moles of KMnO₄
1 mole of SO₃^2- needs 2/5 moles of KMnO₄

Q9. Which of the following is the coordination entity in K₂[Zn(OH)₄]?
(a) K⁺
(b) Zn²⁺
(c) OH^–
(d) [Zn(OH)₄]^2-

Ans. (d)
Explanation: A coordination entity consists of a central metal atom bonded to a fixed number of atoms/molecules. Here, K⁺ is the counter ion, OH is the molecule bonded to the central atom which is Zn.

Q10. When chlorine is passed through propene at 400⁰ C, which of the following is formed?

1. PVC
2. Allyl chloride
3. Propyl chloride
4. 1,2-Di-chloroethane

Ans. (b)
Sol. When chlorine gas is reacted with propene at high temperature (400∘ C), then substitution takes place in place of addition reaction. Hence, allyl chloride is formed.

Q11. Two possible stereo-structures of CH₃CHOHCOOH, which are optically active are called:

1. Atropisomers
2. Enantiomers
3. Mesomers
4. Diastereomers

Q12. The heating of phenyl methyl ether with HI produces:
(a) Iodobenzene
(b) Phenol
(c) Benzene
(d) Ethyl chloride
Q13. Among the following sets of reactants which one produces anisole?
(a) CH₃CHO; RMgX
(b) C₆H₅OH; NaOH, CH₃I
(c) C₆H₅OH, neutral FeCl₃
(d) C₆H₅ —CH₃; CH₃COCl; AlCl₃
Q14. Compound which is used for separation of acetone and acetophenone:

1. a) Sodium bisulphate
2. b) Grignard reagent
3. c) Sodium sulphate
4. d) Ammonium chloride

Q15. The polar nature of carbonyl group in aldehydes and ketones is due to:

1. a) Very less electronegative difference
2. b) Very large electronegative difference
3. c) Presence of hydrogen bonding
4. d) Presence of sp hybridised characters in carbonyl compound

Q16. The amine formed from an amide by means of bromine and alkali has how many number of carbon atoms?

1. a) Same number of C atoms as that of amide
2. b) One less C atom than that of amide
3. c) One more C atom than that of amide
4. d) Two more C atoms than that of amide

Q17. Ethylamine can be prepared by the action of bromine and caustic potash on which compound?

1. a) Acetamide
2. b) Propionamide
3. c) Formamide
4. d) Methyl cyanide

Q18. On oxidation with a mild oxidising agent like Br₂/H₂O, the glucose is oxidized to:
(a) Saccharic acid
(b) Glucaric acid
(c) Gluconic acid
(d) Valeric acid

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