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Chemistry · Class 11 Science

Jharkhand Jac 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.

2019–2026
Years of papers
7
Total Papers
7
Real Board Papers
0
Sample papers
269
Real-paper Q & A
0
Sample-paper Q & A

Real board-paper questions available, by year

40 Q2026complete
40 Q2025complete
40 Q2024complete
40 Q2023complete
59 Q20222 sets
—2021Likely no exam held (COVID-19)
—2020Paper not available
50 Q2019complete
—2018Paper not available

2021 — Likely no exam held (COVID-19): JAC confirmed the Class-12 (Intermediate 2nd Year) examination was cancelled in 2021 due to COVID-19, and no source we check lists any 2021 paper for Class-11 either — strongly suggesting the same cancellation applied, though no source names Class-11 explicitly. We publish only a paper we can verify against a real printed original, so we show none rather than an unconfirmed copy.

2020 — Paper not available: The JAC Intermediate 1st Year exam was presumably held this year, but no verified question paper for this subject has been published by any source we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original — it will appear here once it is.

2018 — Paper not available: The JAC Intermediate 1st Year exam was presumably held this year, but no verified question paper for this subject has been published by any source we check — the official archive and the public past-paper archives. We publish only a paper we can verify against a real printed original — it will appear here once it is.

JAC Intermediate Board (1st Year) 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
40
Questions
40
Duration
60 min
Sections
1

The marks / questions / duration above are the official exam pattern. We currently have 40 of this paper’s questions (100% of the full paper), with 40 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

Sections & marks

SectionTypeQuestionsMarks eachTotal
ASection Amcq40140
Total4040

The question paper

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

Board Examination

Chemistry

JAC Intermediate Board (1st Year) 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________
Time Allowed: 1 hourMaximum Marks: 40

General Instructions

  1. This question paper contains 40 questions divided into 1 sections — A.
  2. Section A comprises 40 questions of 1 mark each (mcq).

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

Section A

mcq · 1 mark each · 40 of 40 shown

Q1.
How many significant figures does 0.057 have?
  • (a) 2
  • (b) 4
  • (c) 3
  • (d) 0
[1]
Q2.
Which of the following is not the law of chemical combination?
  • (a) Law of multiple proportion
  • (b) Avogadro's law
  • (c) Law of definite proportion
  • (d) Law of conservation of volume
[1]
Q3.
What is the amount of water produced when 8 g of hydrogen is reacted with 32 g of oxygen?
  • (a) 2 moles
  • (b) 1 mole
  • (c) 3 moles
  • (d) 0.5 mole
[1]
Q4.
The empirical formula of benzene is
  • (a) C6H12
  • (b) CH
  • (c) C6H6
  • (d) CH2
[1]
Q5.
What is the concentration of sugar (C12H22O11) in mole L^-1, if its 20 g are dissolved in enough water to make final volume up to 2 L? (A) 0.2925 mol L^-1 (B) 0.02925 mol L^-1 (C) 0.0585 mol L^-1 (D) 0.585 mol L^-1
[1]
Q6.
If the number of protons and neutrons of an element is 13 and 14 respectively, then what are the atomic number (Z) and mass number (A)?
  • (a) 13, 13
  • (b) 13, 27
  • (c) 14, 13
  • (d) 27, 14
[1]
Page 1 of 5
Q7.
What is the wavelength for the visible region in electromagnetic radiation? (a) 400 - 750 nm (b) 400 - 750 mm (c) 400 - 750 μm (d) 400 - 750 pm
[1]
Q8.
If energy = 4.5 kJ, the wavelength is (a) 4.42 x 10^-29 m (b) 4.42 x 10^-39 m (c) 4.42 x 10^-25 m (d) 4.42 x 10^-22 m
[1]
Q9.
When an electron jumps from 3rd orbit to 2nd orbit, which series of spectral lines are obtained? (a) Balmer (b) Lyman (c) Paschen (d) Brackett
[1]
Q10.
What is the shape of orbital whose l is 1? (a) Spherical (b) Dumb-bell (c) Double dumb-bell (d) Complex
[1]
Q11.
Which of the following sets of quantum number is not valid? (a) n = 5, l = 2, m = 0, s = -1/2 (b) n = 1, l = 2, m = 0, s = +1/2 (c) n = 5, l = 3, m = 2, s = +1/2 (d) None of these
[1]
Q12.
According to the Aufbau's principle which of the following orbitals should be filled first? (a) 5d (b) 4p (c) 3p (d) 2s
[1]
Q13.
The physical and chemical properties of an element are the periodic function of its (a) Atomic mass (b) Element behaviour (c) No. of protons (d) Atomic number
[1]
Q14.
The pair of elements which are members of third period are (a) Be, P (b) Si, Cl (c) N, O (d) F, Al
[1]
Q15.
Lowest ionisation enthalpy in the periodic table is shown by (a) Chalcogens (b) Halogens (c) Alkali metals (d) Alkaline earth metals
[1]
Q16.
The correct order of radii is (a) Na+ > F > Al+3 > Mg+2 (b) N-3 < Na+ < Mg+2 < O-2 (c) Al+3 < Mg+2 < O-2 < S-2 (d) Mg+2 < N-3 < O-2 < F-
[1]
Q17.
If the electronic configuration of an element is [Ar]3d¹0 4s² 4p⁶, the element belongs to (a) s-block (b) p-block (c) d-block (d) f-block
[1]
Page 2 of 5
Q18.
Which of the following molecules does not exist? (a) O2 (b) H2 (c) He2 (d) N2
[1]
Q19.
Which of the following is a set of isoelectronic species? (a) CO, N2, CN- (b) N2, O2+, NO (c) CO, CN-, O2^-2 (d) NO2-, N2O, O3
[1]
Q20.
The hybridisation of 'N' in NH3 is (a) sp3d (b) sp3d2 (c) sp3 (d) sp2
[1]
Q21.
Which of the following is mismatch regarding shape? (a) XeF4 — Octahedral (b) PCl5 — Trigonal bipyramidal (c) SO2 — Bent (d) CH4 — Tetrahedral
[1]
Q22.
A system which can neither exchange matter nor energy with the surrounding is called (a) Open system (b) Isolated system (c) Closed system (d) Both (A) and (B)
[1]
Q23.
In a process, 701 J of heat is absorbed by a system and 394 J of work is done by the system. The change in internal energy is (a) -307 J (b) 307 J (c) -1095 J (d) 1095 J
[1]
Q24.
For the reaction 2H(g) -> H2(g), the signs of ΔH and ΔS respectively are (a) +, + (b) +, - (c) -, + (d) -, -
[1]
Q25.
Calculate the enthalpy change for the following reaction: CH4(g) + 2O2(g) -> CO2(g) + 2H2O(l). Given enthalpies of formation of the compounds CH4, CO2 and H2O are -74.8 kJ/mole, -393.5 kJ/mole and -286.2 kJ/mole respectively. (a) 891.1 kJ (b) -891.1 kJ (c) -923.1 kJ (d) 923.1 kJ
[1]
Q26.
For which process is ΔG = negative? (a) Isothermal (b) Spontaneous (c) Adiabatic (d) Non-spontaneous
[1]
Q27.
For the reaction, CuSO4.5H2O(s) <=> CuSO4.3H2O(s) + 2H2O(g), which one is correct representation? (a) Kp = p²(H2O) (b) Kc = [H2O]² (c) Kp = Kc(RT)² (d) All of these
[1]
Page 3 of 5
Q28.
Which one is the conjugate base of HSO4-? (a) H2SO4 (b) HSO3 (c) SO3 (d) SO4²-
[1]
Q29.
Which of the following can act as Lewis acid? (a) OH- (b) F- (c) BCl3 (d) H-
[1]
Q30.
NaOH(aq), HCl(aq) and NaCl(aq) have concentration of 10^-3 M each. Their pH will be respectively (a) 10, 6, 2 (b) 11, 3, 7 (c) 10, 3, 7 (d) 10, 4, 7
[1]
Q31.
The oxidation numbers of boron in NaBH4 and Cr in K2Cr2O7 are (a) +4, +3 (b) +3, +6 (c) -3, +6 (d) -4, +12
[1]
Q32.
In the following reaction 4P + 3KOH + 3H2O -> 3KH2PO2 + PH3, which statement is correct? (a) 'P' is oxidised only (b) 'P' is reduced only (c) 'P' is oxidised as well as reduced (d) 'P' is neither oxidised nor reduced
[1]
Q33.
How many σ and π bonds are present in the following molecule? N≡C-CH-C≡N (a) σ = 5, π = 4 (b) σ = 6, π = 3 (c) σ = 4, π = 2 (d) σ = 3, π = 5
[1]
Q34.
2-chloropropane and 1-chloropropane will exhibit ......... isomerism. (a) chain (b) position (c) functional group (d) metamerism
[1]
Q35.
The IUPAC name of isobutyl chloride is (a) 2-chlorobutane (b) 1-chloro-2-methyl propane (c) 2-chloro-2-methyl propane (d) 1-chlorobutane
[1]
Q36.
Which of the following is a nucleophile? (a) NO2+ (b) Cl+ (c) CN- (d) (CH3)4N+
[1]
Q37.
Homolytic fission leads to the formation of (a) nucleophile (b) carbanion (c) free radical (d) carbocation
[1]
Q38.
But-2-ene --(i) O3, (ii) H2O/Zn--> Product. Product is (a) ethanol (b) ethanal (c) acetone (d) propanal
[1]
Page 4 of 5
Q39.
Which of the following is aromatic? (a) Four-membered rectangular ring structure (b) Three-membered (triangular) ring structure (c) Three-membered (triangular) ring structure bearing a negative charge/lone pair at the apex (d) Two fused six-membered rings (naphthalene-type structure)
[1]
Q40.
The reaction used for preparation of higher alkanes from alkyl halides is (a) Wurtz reaction (b) Kolbe's reaction (c) β-elimination (d) Friedel-Crafts acylation
[1]
Page 5 of 5