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Chemistry · Class 12 Science

Jammu Kashmir Jkbose Class 12 Chemistry — Real Previous-Year Papers

with complete answers

Real previous-year board papers, year by year — the official exam pattern, the full question paper, and every question solved the concept-first way. Distinct from the chapter-wise textbook bank.

2018–2026
Years of papers
9
Total Papers
9
Real Board Papers
0
Sample papers
267
Real-paper Q & A
0
Sample-paper Q & A

Real board-paper questions available, by year

31 Q2026complete
31 Q2025complete
31 Q2024complete
28 Q2023complete
28 Q2022complete
28 Q2021complete
30 Q2020complete
30 Q2019complete
30 Q2018complete

JKBOSE Class 12 Annual Regular Examination 2026 · Set ANNUAL

Real board examination

About this paper

The real Class-12 board examination held in 2026. Every question below is solved the concept-first way. Sample papers are labelled honestly — never shown as a past exam.

Total marks
70
Questions
31
Duration
180 min
Sections
4

The marks / questions / duration above are the official exam pattern. We currently have 31 of this paper’s questions (100% of the full paper), with 31 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

Sections & marks

SectionTypeQuestionsMarks eachTotal
ASection Amcq10110
BSection Bsubjective9218
CSection Csubjective9327
DSection Dsubjective3515
Total3170

The question paper

The questions we hold for this paper, laid out by section. Solutions are on the Answers tab.

Board Examination

Chemistry

JKBOSE Class 12 Annual Regular Examination 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________
Time Allowed: 3 hoursMaximum Marks: 70

General Instructions

  1. This question paper contains 31 questions divided into 4 sections — A, B, C, D.
  2. Section A comprises 10 questions of 1 mark each (mcq).
  3. Section B comprises 9 questions of 2 marks each (subjective).
  4. Section C comprises 9 questions of 3 marks each (subjective).
  5. Section D comprises 3 questions of 5 marks each (subjective).

Above is the official exam pattern. The questions printed below are those we currently hold for this paper.

Section A

mcq · 1 mark each · 10 of 10 shown

Q1.
The temperature at which the molarity of Pure water is equal to its molality is:
  • (a) 273 K
  • (b) 298 K
  • (c) 277 K
  • (d) 270 K
[1]
Q2.
Which of the following is not correct for an ideal solutions?
  • (a) Raoult's law is obeyed for entire concentration range and temperatures.
  • (b) ΔH_mix = O
  • (c) ΔV_mix = O
  • (d) ΔS_mix = O
[1]
Q3.
The electricity required in coulomb for the oxidation of 1 mol of H2O to O2 is:
  • (a) 0.93 x 10^5 C
  • (b) 1.93 x 10^5 C
  • (c) 2.93 x 10^5 C
  • (d) 3.93 x 10^5 C
[1]
Q4.
The Property, which is not characteristic of transition elements is:
  • (a) Variable Oxidation states
  • (b) Tendency to form complexes
  • (c) Formation of coloured compounds
  • (d) Natural radioactivity
[1]
Q5.
An ornament of gold having 87.5% of gold, is of ............... carat.
  • (a) 15
  • (b) 18
  • (c) 21
  • (d) 24
[1]
Q6.
Ethylidene bromide is a/an:
  • (a) Vic-dihalide
  • (b) Gem-dihalide
  • (c) Allylic halide
  • (d) Vinylic halide
[1]
Page 1 of 5
Q7.
Ethanol undergo dehydration in the presence of H2SO4 at 413 K and yields .................... as major product. (a) CH2 = CH2 (b) C2H5OC2H5 (c) CH3-CH=CH2 (d) CH3-CH=CH-CH3
[1]
Q8.
The acid present in ants is: (a) Formic acid (b) Acetic acid (c) Propanoic acid (d) Butanoic acid
[1]
Q9.
Hinsberg's reagent is: (a) Benzene Sulphonyl chloride (b) Benzene Sulphonic acid (c) Phenyl isocyanide (d) Benzene diazonium chloride
[1]
Q10.
Deficiency of which vitamin causes rickets (a) Vitamin A (b) Vitamin B (c) Vitamin C (d) Vitamin D
[1]
Section B

subjective · 2 marks each · 9 of 9 shown

Q1.
Calculate the molarity of a solution containing 5g of NaOH in 500 ml solution?
[2]
Q2.
The t1/2 of a reaction is halved as the initial concentration of the reaction is doubled. What is the order of the reaction?
[2]
Q3.
Indicate the type of isomerism exhibited by the following complex K[ Cr (H2O)2 (C2O4)2 ] and draw the structures for these isomers.
[2]
Q4.
Give the uses and environmental effects of carbon tetrachloride.
[2]
Q5.
What is Arrhenius equation? What is its importance?
[2]
Page 2 of 5
Q6.
Define the following with an example. (a) Coordination compound (b) Ligand
[2]
Q7.
Describe Reimer-Tiemann reaction.
[2]
Q8.
Write short note on acidity of carboxylic acids.
[2]
Q9.
What is Diazotisation? Write the chemical reaction involved in it.
[2]
Section C

subjective · 3 marks each · 9 of 9 shown

Q1.
What is elevation of boiling point? Show that elevation of boiling point is a colligative property?
[3]
Q2.
What is electrolysis? State and explain Faraday's first law of electrolysis.
[3]
Q3.
What is order of a reaction? Derive expression for the rate constant for the first order reaction.
[3]
Page 3 of 5
Q4.
Give important uses and applications of coordination compounds.
[3]
Q5.
What happens when (a) Ethyl chloride is treated with aqueous KOH (b) Chlorobenzene is treated with methyl chloride in the presence of anhydrous AlCl3 (c) Bromobenzene is treated with methyl bromide and sodium in the presence of dry ether.
[3]
Q6.
Write the mechanism of acid dehydration of ethanol to yield ethene.
[3]
Q7.
Describe a method (Hinsberg test) for the identification of Primary, Secondary and tertiary amines. Also write chemical equation of the reactions involved.
[3]
Q8.
(a) What do you understand by the term glycosidic linkage? (b) Which sugar is called invert sugar? Why is it called so?
[3]
Q9.
Write the important structural and functional differences between DNA and RNA.
[3]
Page 4 of 5
Section D

subjective · 5 marks each · 3 of 3 shown

Q1.
What is an electrochemical cell? Discuss the construction and working of Galvanic cell. How is Galvanic cell represented? **OR** Define corrosion. Explain electrochemical theory of rusting. Name the important factors affecting corrosion.
[5]
Q2.
Discuss the following properties of transition (3d) elements. (a) Magnetic Properties (b) Oxidation States **OR** Indicate the steps in the preparation of KMnO4 from Pyrolusite ore. Write the ionic equations for the reaction of KMnO4 in acidic medium with (a) Iron (II) solution (b) Oxalate ion
[5]
Q3.
How will you prepare aldehydes from (a) Ozonolysis of alkenes (b) Acyl chloride (Rosenmund reduction) (c) Nitriles (Stephen reaction) (d) Toluene (Etard reaction) **OR** Write short notes (along with the reaction) on: (a) Cross aldol condensation (b) Cannizaro reaction (c) Hell-Volhard-Zelinsky reaction.
[5]
Page 5 of 5