Chemistry | General Stream | Question Paper 2082-2025 of Class 12 | NEB - PDF Download

Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB PDF Download.

Download Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB in PDF. Perfect for Regular and Partial students with registration numbers 78, 79, 80, 81.

• Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB
• NEB Chemistry Paper 2082
• Class 12 Chemistry Question Paper PDF
• NEB Exam Preparation Chemistry

The Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB is an essential resource for students preparing for their final board examinations under the National Examination Board (NEB). Designed specifically for Regular and Partial students with registration numbers starting from 78, 79, 80, and 81, this question paper provides a clear understanding of the latest exam pattern, marking scheme, and important topics. By downloading the Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB in PDF format, students can effectively practice and familiarize themselves with real exam questions, boosting both confidence and performance.

Students can use the Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB as a powerful study tool to revise key concepts, improve time management, and identify frequently asked questions. This paper reflects the updated syllabus and helps learners focus on high-weightage areas in a structured way. Whether you are aiming for excellent grades or simply want to strengthen your preparation, downloading this PDF ensures you have access to a reliable and exam-focused resource that supports smart and efficient study strategies.

The Exam Question Papers provided below - Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB for the board exam 2082-2025 and is based on the latest NEB Syllabus for the year 2079 and onwards. We will be adding more Exam Question Papers of grade xii- class 12 later on. Scroll down to Download Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB Sub. Code: 3021D in pdf format which is 326 kb in size. Enjoy!

So, check and Download Class 12 Chemistry General Stream 2080-2082 Question Paper in PDF format.

Chemistry | General Stream | Question Paper 2082-2025 of Class 12 | NEB - PDF Download.

Chemistry | General Stream | Question Paper 2081-2024 of Class 12 | NEB - PDF Download.

Chemistry | General Stream | Question Paper 2080-2023 of Class 12 | NEB - PDF Download.

Chemistry General Stream Question Paper 2082-2025 of Class 12 NEB PDF Download.

NATIONAL EXAMINATIONS BOARD [NEB]

Chemistry 'General Stream'

Grade XII-Class 12

For Regular and Partial General Stream Students

Examination – 2082 (2025)

(New Course)

Subject Code: 3021'D'

Full Marks – 75

Time - 3 hrs

Check this ...

Grade 12 Physics Exam Question Paper of the year 2080-2023 (New Course) | PDF Download.

(For regular and partial general stream's students whose first two digits of registration number starts from 78, 79, 80 and 81)

Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate full marks.

Also Check ...

NEB Class 12 Exam Question Papers Collection 2082-2025.

Accounting | New Course Question Paper 2082-2025 of Class 12 | NEB | PDF Download.

Chemistry | Technical Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 9111 | PDF Download.

Chemistry MCQs | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 3021'D' | PDF Download.

Solution for Chemistry MCQs | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 3021'D' | PDF Download.

Chemistry | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 3021'Q' | PDF Download.

Computer Science | Question Paper 2082-2025 of Class 12 | NEB | Code: 4281 | PDF Download.

Computer Science | MCQs Question Paper 2082-2025 of Class 12 | NEB | Code: 4281 | PDF Download.

Compulsory English | Question Paper 2082-2025 of Class 12 | NEB | Code: 0041C | PDF Download.

Compulsory English | Question Paper 2082-2025 | of Class 12  Partial Students | NEB | Code: 0041P | PDF Download.

Biology | Technical Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 9101 | PDF Download.

Biology | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 2021M | PDF Download.

Biology MCQs | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 2021M | PDF Download.

Physics MCQs | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 1021H | PDF Download.

Solution for Physics MCQs | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 1021H | PDF Download.

Physics | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 1021H | PDF Download.

Physics | Technical Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 9131 | PDF Download.

Hotel Management | Question Paper 2082-2025 of Class 12 | NEB | Code: 4401 | PDF Download.

Economics | Question Paper 2082-2025 of Class 12 | NEB | Code: 3041Q | PDF Download.

Business Studies | Question Paper 2082-2025 of Class 12 | NEB | Code: 2161 | PDF Download.

Education and Development | Question Paper 2082-2025 of Class 12 | NEB | Code: 2041 | PDF Download.

Business Mathematics | Question Paper 2082-2025 of Class 12 | NEB | Code: 4061 | PDF Download.

Compulsory Nepali | Question Paper 2082-2025 of Class 12 | NEB | Code: 0021B | PDF Download.

Mathematics | General Stream Question Paper 2082-2025 of Class 12 | NEB | Code: 4021 | PDF Download.

Instructional Pedagogy and Evaluation | Question Paper 2082-2025 of Class 12 | NEB | Code: 1181 | PDF Download.

Mathematics | Old Course | Question Paper 2082-2025 of Class 12 | NEB | Code: 216 | PDF Download.

Health and Physical Education | Old Course | Question Paper 2082-2025 of Class 12 | NEB | Code: 244 | PDF Download.

Mathematics | MCQs | 2082-2025 for Regular Students of Class 12 | NEB | Code: 0081W | PDF Download.

Mathematics | Question Paper 2082-2025 for Regular Students of Class 12 | NEB | Code: 0081W | PDF Download.

Mathematics | Technical Stream | Question Paper 2082-2025 of Class 12 | NEB | Code: 9121 | PDF Download.

Optional English | Question Paper 2082-2025 of Class 12 | NEB | Code: 3341 | PDF Download.

Optional Nepali | Question Paper 2082-2025 of Class 12 | NEB | Code: 3321 | PDF Download.

Social Studies and Life Skill Education | Question Paper 2082-2025 of Class 12 | NEB | Code: 0061W | PDF Download.

Social Studies and Life Skill Education | Question Paper 2082-2025 of Class 12 | NEB | Code: 4481 | PDF Download.

Agri-Economics | Technical Stream | Question Paper 2082-2025 of Class 12 | NEB | Code: 9241 | PDF Download.

Plant Pathology and Mushroom Production | Technical Stream | Question Paper 2082-2025 of Class 12 | NEB | Code: 9231 | PDF Download.

Commercial Vegetable Production and Marketing | Old Course | Question Paper 2082-2025 of Class 12 | NEB | Code: 420 | PDF Download.

Vegetable and Medicinal Plant Production | Question Paper 2082-2025 of Class 12 | NEB | Code: 9251 | PDF Download.

Attempt all the questions.

Group 'A'

Question No. 1 to 11 (Multiple Choice Questions) will be provided after 30 minutes of starting examination. Rewrite its (MCQ) correct option (answer) in the same answer sheet.(alert-success)

Group 'B' [8x5=40]

12. Define instantaneous rate of reaction. Write down the rate expressions of the following reaction.

2N₂O₅(g) → 4NO₂(g) + O₂(g)

If 2.24 litres of O₂ at NTP is produced in 30 minutes, what is the rate of disappearance of N₂O₅(g) ? [5]

13. Define standard heat of formation. Calculate the heat of formation of acetic acid from the following data : [5]
C(s) + O₂(g) → CO₂(g) ; ∆H = -99 kcal/mol
H₂(g) + 1∕O₂(g) → H₂O(l) ; ∆H = -68 kcal/mol
CH₃COOH + 2O₂(g) → 2CO₂(g) +2H₂O(l) ; ∆H = -208 kcal/mol

Or
You are given the standard reduction potentials,
E⁰Zn²⁺ / Zn = - 0.76 V, E⁰Mg²⁺ /Mg = - 2.38 V

Answer the following questions :
a) What is standard electrode potential ? [1]
b) Construct the galvanic cell notation for the given electrodes indicating anode and cathode. [2]
c) Write the complete cell reaction for the given cell. [1]
d) Calculate the cell potential for the given cell at 25⁰C. [1]

14. A chemical reaction occurs as follows :
CH₃CH₂CH₂Br + aq. KOH → B + KBr
(A)
a) Identify the compound 'B' in the above reaction. [1]
b) Which substitution reaction mechanism occurs in the above reactionand why ? [2]
c) What is the product formed when alc. KOH solution is used instead of aq. KOH in the above reaction? [1]
d) How can you obtain nitropropane from compound 'A' ? [1]

15. A list of compounds is given as follows :

P-aminoazobenze, Benzenediazonium chloride, Aniline, Nitrobenzene, Phenol and Benzene (alert-success)

From the above list of compounds, prepare a sequence of reaction chain with suitable conditions and reagents. [5]

Or
An aliphatic compound (A) reacts with SOCl₂ to give (B). The compound (B) is heated with ammonia to produce (C). The compound (C) is further heated with Br₂ /KOH to yield (D). The compound (D) gives (E) when treated with NaNO₂ /HCl at low temperature. The compound (E) is a primary alcohol which gives positive iodoform test. Identify compound (A) to (E) with the reactions involved. [5]

16. Write the chemical equations to illustrate the following reactions : [5x1=5]
a) 2,4-DNP test
b) Reimer-Tiemann reaction
c) Williamson's reaction
d) Perkin's condensation reaction
e) Wurtz-Fittig's reaction

17. You are given the mixture of two compounds A and B.
A = CH₃CH₂CH₂-NH₂ and B = CH₃CH₂NHCH₃
How would you separate their mixture by applying Hoffmann's method ?
Give the nitrous acid test to distinguish between compounds A and B. [3+2]

18. The metal 'M' with electronic configuration [Ar] 3d¹⁰4s² belongs to group IIB in the periodic table and is commonly called 'Jasta'.
a) Identify metal 'M' and write its main ore. [1]
b) Why is metal 'M' not considered as transition element ? [1]
c) Draw the vertical retort. Write its reduction reaction. [2]
d) What happens when metal 'M' is exposed to air for a long time ? [1]

19. What is rusting ? Describe the electrochemical theory of rusting of iron. List any two methods for the prevention of rusting. [5]

Group 'C' [3x8=24]

20. Deduce the normality equation, N₁V₁ = N₂V₂. Experimental data obtained by titrating decinormal solution of oxalic acid with potassium permanganate solution are given below. [2]

a) Name the above titration. [1]
b) Calculate the equivalent weight of KMnO₄. [1]
c) Calculate the normality of KMnO₄ from the above data. [2]
d) Why is dil.H₂SO₄ added to the conical flask containing standard oxalic acid before titrating with KMnO₄ solution ? [1]
e) Identify the titrant and titrand in this titration. [1]

Or
a) Write the applications of solubility product principle and common ion effect in qualitative salt analysis. [4]
b) Differentiate between Bronsted-Lowry and Lewis concept of bases. [2]
c) Calculate the degree of ionization of HCN having concentration 0.01M (Ka of HCN = 4.8x10⁻¹⁰). Also calculate H+ concentration and pH of the solution. [2]

21. An organic compound (X) reacts with Grignard's reagent to give (Y), which on oxidation gives (Z). All of the compounds (X), (Y) and (Z) give positive iodoform test.
a) Identify the compounds (X), (Y) and (Z) with reactions and conditions involved. [3]
b) Why do these compounds give positive iodoform test ? [1]
c) How would you convert compound (Y) into pseudonitrol ? [2]
d) Write any two methods for the preparation of compound (Z). [2]

Or
How will you carry out the following conversions ?
a) Ethanol into chloroform [2]
b) Phenol into DDT [2]
c) Ethoxyethane into methoxymethane [2]
d) Aniline into chlorobenzene [2]

22. Answer the following questions :
a) What are the raw materials for the production of paper ? [2]
b) Draw the flowsheet diagram for the manufacture of Portland cement. [3]
c) Nuclear fusion reaction is also called thermonuclear reaction. Why ? [1]
d) How are addition and condensation polymers formed ? Write an example of each. [2] 

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