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

Chemistry Technical Stream Question Paper 2082-2025 of Class 12 NEB – PDF Download (Subject Code 9111).

Download the Chemistry Technical Stream Question Paper 2082-2025 of Class 12 NEB (Subject Code 9111) for Regular and Partial students with registration numbers starting from 79, 80, and 81. Practice with the official paper to prepare better for exams.

• Chemistry Technical Stream Question Paper 2082-2025 of Class 12 NEB
• Class 12 Chemistry Technical Stream Question Paper 2082-2025
• NEB Chemistry Technical Stream Paper 9111
• Class 12 NEB Question Paper PDF
• Chemistry Technical Stream NEB PDF Download

The Chemistry Technical Stream Question Paper 2082-2025 of Class 12 NEB is an important resource for students preparing for their National Examination Board (NEB) final examinations. Designed for Regular and Partial students whose registration numbers begin with 79, 80, and 81, this question paper (subject code: 9111) helps learners understand the exam structure, marking scheme, and key topics covered in the technical stream curriculum. By reviewing the Chemistry Technical Stream Question Paper 2082-2025 of Class 12 NEB, students can practice effectively, identify frequently asked questions, and improve their confidence before the examination.

Students looking for reliable study materials can easily access the Chemistry Technical Stream Question Paper 2082-2025 of Class 12 NEB through a convenient PDF download. This paper is especially useful for technical stream students studying subjects related to engineering fields such as civil, computer, and electrical engineering. Practicing with the official question paper allows students to evaluate their preparation level, strengthen problem-solving skills, and focus on important chapters from the NEB syllabus, making it a valuable guide for achieving better exam results.

The Exam Question Papers provided below - Chemistry Technical 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 Technical Stream Question Paper 2082-2025 of Class 12 NEB Sub. Code: 9111 in pdf format which is 304 kb in size. Enjoy!

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

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

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

NATIONAL EXAMINATIONS BOARD [NEB]

Chemistry 'Technical Stream'

Grade XII-Class 12

For Regular and Partial Students

Examination – 2082 (2025)

(New Course)

Subject Code: 9111

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 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.

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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.

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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.

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

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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.

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Attempt all the questions.

Group 'A'  [11x1=11]

Rewrite the correct option of each question in your answer sheet.

1. Which of the following indicator is suitable for the titration between ethanoic acid and NaOH ?

A) Methyl orange
B) Phenolphthalein
C) Methyl red

D) Litmus paper

2. The enthalpy change for the reaction;

N₂(g) +3H₂(g) ⇌ 2NH₃(g) is -93.7KJmol⁻¹ , what kind of reaction is it ?

A) exothermic
B) endothermic
C) isothermal
D) isobaric

3. Which of the following species can act both as Bronsted acid and Bronsted base ?

A) HCl

B) H₂PO₄

C) HCO₃⁻
D) O₂

4. When copper is heated in air at above 1100⁰C, which of the following compounds is formed ?

A) CuO

B) Cu(OH)₂

C) CuCO₃

D) Cu₂O

5. For which manufacturing process, Bessemer converter is used ?

A) Pig iron

B) Steel

C) Wrought iron

D) Cast iron

6. The substance 'A' which reacts with gangue to form fusible mass. The substance 'A' is called

A) Flux

B) Catalyst

C) Ore

D) Slag

7. An organic compound boiled with water gives phenol. Predict the compound .

A) Chlorobenzene

B) Benzenediazonium chloride
C) Aniline

D) Benzenesulphonic acid

8. Which of the following compounds cannot reduce Fehling's solution ?

A) Benzaldehyde

B) Formaldehyde
C) Acetaldehyde

D) Butyraldehyde

9. Which of the following methods can you apply to convert rectified spirit into absolute alcohol ?

A) Steam distillation

B) Vacuum distillation
C) Simple distillation

D) Azeotropic distillation

10.

A) Ethene

B) Propene
C) But-1-ene

D) But-2-ene

11. Which of the following drugs is used to reduce body temperature during high fever ?

A) Analgesic

B) Antiseptic
C) Antipyritic

D) Disinfectant

Group 'B'

Short answer questions [8x5=40]

12. The fundamental principle of titration is based on the law of chemical equivalence.

a) What does it mean ? [1]
b) Derive normality equation using the law of equivalence. [2]
c) 10cc of N/2 HCl, 30cc of N/10 HNO₃ and 60cc of N/5 H₂SO₄ are mixed. Calculate the normality of the mixture. [2]

Or
State and explain first law of thermodynamics. Give the name of any two home appliances that work on the principle of 1st law of thermodynamics. [3+2]

13. Acidic strength of solution can be measured in term of pH value.
a) Define pH of a solution. [1]
b) What is the application of pH in our daily life ? [1]
c) What is pOH and how is it related to pH ? [2]
d) Calculate the pH of 5x10⁻⁴ M H₂SO₄ solution. [1]

14. Derive and explain integrated rate equation and half life for a zero order reaction. [5]

15. Standard hydrogen electrode can be used as reference electrode.
a) Define standard hydrogen electrode. [1]
b) What is the major application of standard hydrogen electrode ? [1]
c) Draw well labeled diagram of standard hydrogen electrode. [2]
d) What is meant by standard electrode potential ? [1]

16. Derive the equation △G = △H - T△S. Why useful work of system is called free energy ? [4+1]

17. Differentiate between : [2.5+2.5]

a) Calcination and roasting
b) Froth floatation and magnetic separation process.

18. Write down the functional isomer of C₃H₆O with their IUPAC names. How are they distinguished by Tollen's reagent ? How would you obtain these isomers by dehydrogination of alcohols ? [2+1+2]

19. Write an example of each of the following reactions : [1+1+1+1+1]
a) Dow's process
b) Wurtz reaction
c) 2, 4- DNP test
d) Preparation of alcohol from ester.
e) Preparation of phenol from benzene sulphonic acid

Or
The vapour of organic compound (A), if inhaled causes the loss of consciousness and if heated with conc.HNO3 forms a component of tear gas.

i) How would you prepare compound (A) by using one of the isomers of C2H6O. [2]
ii) What happens when compound (A) is : [1+1+1]
a) exposed in air

b) heated with Ag powder
c) heated with aqueous alkali

Group 'C'

Long answer questions [3x8=24]

20. Define the rate of chemical reaction. How do concentration, temperature, catalyst and surface area of reactants affect the rate of reaction ? The half life period of first order reaction is 3 hours. Calculate the time required to complete 87.5% of the reaction. [1+4+3]

Or
Differentiate between solubility and solubility product. How is solubility product principle helpful in the qualitative salt analysis ? [2+6]

21. Iron is a heavy metal and extracted from its oxide ore.
a) Write the name of any two ores of iron. [1]
b) Draw the clean and labelled diagram of the blast furnance showing different zones. [3]
c) Write the reactions involved in different zones. [2]
d) Mention the application of iron in our daily life. [2]

Or
Explain the principle and process sketching a well labelled diagram for the extraction of zinc from its ore. What happen when zinc is exposed to moist air ? [6+2]

22.

a) Radioactivity was discovered accidentally by a scientist Henry Becquerel (1896).
i) What is radioactivity ? Write its unit. [2]
ii) What is meant by artificial radioactivity ? Write an example of it. [2]

b) Mention one example and use of each of the following : [4]
i) Insecticide

ii) Synthetic polymer
iii) Antiseptic

iv) Fungicide

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