Ultimate Practice Sample Paper for CHEMISTRY| All Important Chapters included| Periodic elements| Organic Chemistry| Questions and Answers| Blue print of sample paper at the end of each paper | latest version 2025-26

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केन्द्रीय विद्यालय संगठन
देहरादून संभाग
KENDRIYA VIDYALAYA SANGATHAN
DEHRADUN REGION

रसायन विज्ञान विषय हेतु संिर्धन कायधशाला

Full Compilation of
SUBJECT ENRICHMENT WORKSHOP FOR CHEMISTRY
सत्र/SESSION – 2023-24

Chemistry
कक्षा 11 हेतु प्रवतदशधQuestion
प्रश्नपत्र संग्रह
Paper PAPERS
for PracticeOF CLASS XI With
COMPILATION OF MODEL QUESTION


Detail Explaination Chief Patron
Dr. SUKRITI RAIWANI
of
Answers
Deputy Commissioner, KVS RO Dehradun
Patron
Mrs. SWATY AGARWAL Mr. LALIT MOHAN BISHT Mr. SURJEET SINGH
Assistant Commissioners, KVS RO DehradunN
Coordinator
Mr. ARVIND KUMAR
Principal, Kendriya Vidyalaya No.-2, Roorkee

Venue
Kendriya Vidyalaya, No.-2, Roorkee
1

, CONTENTS
CLASS XI SESSION ENDING MODEL QUESTION PAPERS

S.No. Question Paper Set Page No.

1. Class XI Session Ending Question Paper Set-1 4 – 19

2. Class XI Session Ending Question Paper Set-2 20 – 26

3. Class XI Session Ending Question Paper Set-3 27 – 36

4. Class XI Session Ending Question Paper Set-4 37 – 50

5. Class XI Session Ending Question Paper Set-5 51 – 61

6. Class XI Session Ending Question Paper Set-6 62 – 75

7. Class XI Session Ending Question Paper Set-7 76 – 82

8. Class XI Session Ending Question Paper Set-8 83 – 100

9. Class XI Session Ending Question Paper Set-9 101 – 112

10. Class XI Session Ending Question Paper Set-10 113 – 123

11. Class XI Session Ending Question Paper Set-11 124 – 137

12. Class XI Session Ending Question Paper Set-12 138 – 144

13. Class XI Session Ending Question Paper Set-13 145 – 149

14. Class XI Session Ending Question Paper Set-14 150 – 165

15. Class XI Session Ending Question Paper Set-15 166 – 176

16. Class XI Session Ending Question Paper Set-16 177 – 189

17. Class XI Session Ending Question Paper Set-17 190 – 189

18. Class XI Session Ending Question Paper Set-18 203 – 212




2

, CLASS XI
SESSION ENDING
MODEL QUESTION
PAPERS


3

, SET-1
SESSION ENDING EXAMINATION
SESSION: 2022-23
SUBJECT: CHEMISTRY THEORY
CLASS-XI

MM: 70 Time:3 Hours

General Instructions:
Read the following instructions carefully.
(a) There are 33 questions in this question paper with internal choice.
(b) SECTION A consists of 16 multiple -choice questions carrying 1 mark each.
(c) SECTION B consists of 5 short answer questions carrying 2 marks each.
(d) SECTION C consists of 7 short answer questions carrying 3 marks each.
(e) SECTION D consists of 2 case - based questions carrying 4 marks each.
(f) SECTION E consists of 3 long answer questions carrying 5 marks each.
(g) All questions are compulsory.
(h) Use of log tables and calculators is not allowed.

SECTION: A
1. Which of the following is iso-electronic with neon -
(A) O2– (B) F+ (C) Mg (D) Na
–
2. The value of l and m for the last electron in the Cl ion are -
(A) 1 and 2 (B) 2 and +1 (C) 3 and –1 (D) 1 and –1
3. Which of the following factor shifted the reaction PCl3 + Cl2 ⇔PCl5 at left side?
(A) Adding PCl5 (B) Increase pressure (C) Constant temp (D) Catalyst
4. In a reversible chemical reaction at equilibrium, if the concentration of any one of the
reactants is doubled, then the equilibrium constant will
(A) Also be Doubled (B) Be Halved (C) Remain the Same (D) Become One-Fourth
5. Which of the following molecules follow the octet rule?
(A) ClF3 (B) H2O (C) XeF4 (D) NO2
6. Oxygen has an oxidation state of +2 in
(A) H₂O2 (B) H₂O (C) OF₂ (D) SO₂
7. The empirical formula of a compound of molecular mass 120 is CH2O. The molecular
formula of the compound is :
(A) C2H4O2 (B) C4H8O4 (C) C3H6O3 (D) all of these
8. Which of the following compound has highest covalent character
(A) LiCl (B) LiBr (C) LiF (D) LiI
9. Which of the following rule out the existence of definite path or trajectories of electrons
(A) Pauli’s exclusion principle (B) Heisenberg’s uncertainty principle
(C) Hund’s rule of maximum multiplicity (D) Aufbau’s principle
10. The symbol of an element with atomic number 120 as per IUPAC will be
(A) unb (B) unt (C) ubn (D) uun
4

, 11. What is the change in internal energy ∆U, for a system that does 70 joules of work as it
absorbs 45 joules of heat?
(A) 115 J (B) 25 J (C) –25 J (D) –115 J
12. If the internal energy of an ideal gas decreases by the same amount as the work done by the
system, the process is :-
(A) cyclic (B) isothermal (C) adiabatic (D) isolated

ASSERTION AND REASON TYPE QUESTIONS (1 MARK)
In the following questions, a statement of Assertion (A) followed by a statement of Reason
(R) is given. Choose the correct option out of the choices are given below.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true but R is not the correct explanation of A.
(C) A is true but R is false.
(D) Both A and R are false.
13. Assertion : Equal moles of different substances contain same number of constituent
particles.
Reason : Equal weights of different substances contain the same number of constituent
particles.
14. Assertion (A) : Generally, ionization enthalpy increases from left to right in a period.
Reason (R) : When successive electrons are added to the orbitals in the same principal
quantum level, the shielding effect of inner core of electrons does not increase very much to
compensate for the increased attraction of the electron to the nucleus.
15. Assertion (A): Among the two O – H bonds in H2O molecule, the energy required to break
the first O – H bond and the other O – H bond is the same.
Reason (R): This is because the electronic environment around the oxygen is the same even
after breakage of one O – H bond.
16. Assertion (A): In the reaction H₂S + HNO3 → NO + S + H₂O , HNO3 acts as an oxidising
agent .
Reason (R): HNO3 gets oxidised to NO.

SECTION B
This section contains 5 questions with internal choice in one question. The following
questions are very short answer type and carry 2 marks each.
17. Calculate the number of atoms in each of the following
(i) 52 moles of Ar (ii) 52 u of He
18. What were the reasons for it’s failure of Bohr’ model?
19. Calculate the solubility of silver chloride in water at room temperature if the Ksp of AgCl
is 1.6×10-10.
20. Write the balanced redox reaction
MnO4-(aq) + Fe2+ (aq) → Mn2+(aq)+ Fe3+ (aq) [acidic medium]
21. Draw the cis and trans structures of hex-2-ene. Which isomer will have higher b.p. and
why?
OR
Write IUPAC names of the products obtained by the ozonolysis of Pent-2-ene
5