Chemistry · Class 11 Science

Himachal Hpbose Class 11 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.

2024–2026
Years of papers: 3
Total Papers: 3
Real Board Papers: 0
Sample papers: 98
Real-paper Q & A: 0
Sample-paper Q & A

Real board-paper questions available, by year

28 Q2026complete

40 Q2025complete

30 Q2024complete

—2023Paper not yet available

—2022Paper not yet available

—2021Paper not yet available

—2020Paper not yet available

—2019Paper not yet available

—2018Paper not yet available

2023 — Paper not yet available: The HPBOSE Class-11 exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check — the official hpbose.org and the public past-paper archives, none of which carry pre-2021 Class-11 content for any subject. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2022 — Paper not yet available: The HPBOSE Class-11 exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check — the official hpbose.org and the public past-paper archives, none of which carry pre-2021 Class-11 content for any subject. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2021 — Paper not yet available: The HPBOSE Class-11 exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check — the official hpbose.org and the public past-paper archives, none of which carry pre-2021 Class-11 content for any subject. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2020 — Paper not yet available: The HPBOSE Class-11 exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check — the official hpbose.org and the public past-paper archives, none of which carry pre-2021 Class-11 content for any subject. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2019 — Paper not yet available: The HPBOSE Class-11 exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check — the official hpbose.org and the public past-paper archives, none of which carry pre-2021 Class-11 content for any subject. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2018 — Paper not yet available: The HPBOSE Class-11 exam was presumably held this year, but no verified question paper for this subject has been found from the sources we check — the official hpbose.org and the public past-paper archives, none of which carry pre-2021 Class-11 content for any subject. We publish only a paper we can verify against a real printed original — it will appear here once it is.

HPBOSE Himachal Pradesh Class 11 Board Exam 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: 60
Questions: 28
Duration: 180 min
Sections: 5

The marks / questions / duration above are the official exam pattern. We currently have 28 of this paper’s questions (100% of the full paper), with 28 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

Sections & marks

Section	Type	Questions	Marks each	Total
ASection A	compulsory	12	1	12
BSection B	compulsory	7	2	14
CSection C	compulsory	5	3	15
DSection D	case_study	1	4	4
ESection E	compulsory	3	5	15
Total		28		60

The question paper

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

Board Examination

Chemistry

HPBOSE Himachal Pradesh Class 11 Board Exam 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________

Time Allowed: 3 hoursMaximum Marks: 60

General Instructions

This question paper contains 28 questions divided into 5 sections — A, B, C, D, E.
Section A comprises 12 questions of 1 mark each (compulsory).
Section B comprises 7 questions of 2 marks each (compulsory).
Section C comprises 5 questions of 3 marks each (compulsory).
Section D comprises 1 question of 4 marks each (case_study).
Section E comprises 3 questions of 5 marks each (compulsory).

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

Section A

compulsory · 1 mark each · 12 of 12 shown

Q1.

The submultiple 10^-2 has the prefix :

(a) Centi
(b) Hecto
(c) Tera
(d) Zepto

[1]

Q2.

An orbital in which n = 4, l = 2 is expressed as :

(a) 4p
(b) 4d
(c) 4f
(d) 3d

[1]

Q3.

The number of unpaired electrons in Chromium (z = 24) is :

(a) 4
(b) 6
(c) 3
(d) 5

[1]

Q4.

Which of the following has largest negative electron gain enthalpy?

(a) F
(b) Cl
(c) Br
(d) I

[1]

Q5.

Ostwald's dilution law is not obeyed by :

(a) CH3COOH
(b) NH4OH
(c) HCl
(d) H2CO3

[1]

Q6.

Oxidation is defined as :

(a) loss of protons
(b) gain of electrons
(c) loss of electrons
(d) gain of protons

[1]

Q7.

CnH2n is the general formula of :

(a) arenes
(b) alkynes
(c) alkanes
(d) alkenes

[1]

Page 1 of 5

Q8.

The IUPAC name of the compound is : CH2=CH-CH(CH3)-CH3 (a) 1-Isopropyl ethene (b) 3-Methylbut-1-ene (c) 2-Vinyl propene (d) 1,1-Dimethyl-2-propene

[1]

Q9.

Ethylene reacts with Baeyer's reagent to give : (a) Glycol (b) Acetaldehyde (c) Oxalic acid (d) Ethyl alcohol

[1]

Q10.

Anti-Markovnikov's addition of HBr is not observed in : (a) But-1-ene (b) Pent-2-ene (c) But-2-ene (d) Ethene

[1]

Q11.

Structure of Atom : Assertion (A) : Bohr's theory accounts for the stability and line spectrum of Li²+ ion. Reason (R) : Bohr's theory explain the splitting of spectral lines in the presence of a magnetic field. (Choose the correct option for the Assertion-Reason pair.) (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A). (b) Both Assertion (A) and Reason (R) are true but Reason (R) is not correct explanation of Assertion (A). (c) Assertion (A) is true but Reason (R) is false. (d) Assertion (A) is false but Reason (R) is true.

[1]

Q12.

Equilibrium : Assertion (A) : A solution containing a mixture of ammonium chloride and ammonium hydroxide maintains a constant value of pH on addition of small amounts of acid or alkali. Reason (R) : A solution containing mixture of ammonium chloride and ammonium hydroxide act as a buffer solution around pH 9.25. (Choose the correct option for the Assertion-Reason pair.) (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A). (b) Both Assertion (A) and Reason (R) are true but Reason (R) is not correct explanation of Assertion (A). (c) Assertion (A) is true but Reason (R) is false. (d) Assertion (A) is false but Reason (R) is true.

[1]

Section B

compulsory · 2 marks each · 7 of 7 shown

Q1.

State and explain Aufbau principle.

[2]

Q2.

What are d-block elements? Give their general outermost electronic configuration.

[2]

Q3.

State second law of Thermodynamics.

[2]

Page 2 of 5

Q4.

If 100 calories of heat are added to a system and a work of 50 calories is done on the system. Calculate the internal energy change of the system.

[2]

Q5.

What are Carbanions? Give examples.

[2]

Q6.

What is Fractional distillation? When is it used?

[2]

Q7.

What is Wurtz-Fittig reaction?

[2]

Section C

compulsory · 3 marks each · 5 of 5 shown

Q1.

(a) Give four points of differences between Orbit and Orbitals. (2) (b) What is the shape of s and p orbitals. (1)

[3]

Q2.

(a) What is Ionisation enthalpy? What are the factors which influence the Ionization enthalpy? (2) (b) Write IUPAC name of element with atomic number 114. (1)

[3]

Q3.

(a) Define the terms with suitable examples : (i) Enthalpy of Combustion. (ii) Enthalpy of Sublimation. (2) (b) Explain the state of a reaction when ΔG < 0? (1)

[3]

Page 3 of 5

Q4.

(a) Balance the following reaction by Oxidation number method. (2) MnO2 + HCl -> MnCl2 + H2O + Cl2 (b) Calculate the Oxidation number of S in Na2SO4. (1)

[3]

Q5.

(a) What is Inductive effect? (1) (b) Arrange the following in decreasing order of Acid strength and give reason for your answer. (2) CH3CH2COOH, (CH3)2CHCOOH, (CH3)3CCOOH.

[3]

Section D

case_study · 4 marks each · 1 of 1 shown

Q1.

Case Study : The pH scale Measurement of pH of a solution is very essential as its value should be known when dealing with Biological and Cosmetic application. Hydronium ion concentration in molarity is more conveniently expressed on a logarithmic scale known as the pH scale. For an acidic solution, pH is less than 7 but for basic solution, it is more than 7. Answer the following questions : (a) What is pH value? (1) (b) What is pH value of our blood and why it remain constant inspite of the variety of Food and Spices we eat? (1) (c) What is the effect of Temperature on pH? (1) (d) Who introduced pH scale? (1)

[4]

Section E

compulsory · 5 marks each · 3 of 3 shown

Q1.

(a) What is the Molarity of Sugar (C12H22O11), if its 20 g are dissolved in Water to make volume upto 2 L? (2) (b) An organic compound has the following percentage composition; C = 48%, H = 8%, N = 28% and rest is Oxygen. Calculate the empirical formula of the compound. (2) (c) Define the Mass percent. (1)

[5]

Page 4 of 5

Q2.

(a) What is Hybridisation? Discuss sp3-Hybridisation with example. (2) (b) What is Hydrogen bond? Explain its types. (2) (c) Define the Formal charge. (1)

[5]

Q3.

(a) Write a short note on Peroxide effect. (2) (b) How will you convert Ethyne to Ethane? (2) (c) Complete the reaction : (1) 3HC≡CH --(Red hot iron tube, 873 K)--> ?

[5]

Page 5 of 5