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Chemistry · Class 12 Science

Rajasthan Rbse 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
8
Total Papers
8
Real Board Papers
0
Sample papers
323
Real-paper Q & A
0
Sample-paper Q & A

Real board-paper questions available, by year

53 Q2026complete
53 Q2025complete
51 Q2024complete
38 Q2023complete
38 Q2022complete
—2021Exam cancelled (COVID-19)
30 Q2020complete
30 Q2019complete
30 Q2018complete

2021 — Exam cancelled (COVID-19): RBSE cancelled the Class-12 Senior Secondary Examination in 2021 due to COVID-19 (a Rajasthan State Council of Ministers decision); students were promoted via internal assessment. No exam was administered that year, so there is no genuine previous-year paper to publish.

Rajasthan Board Senior Secondary 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
56
Questions
53
Duration
195 min
Sections
4

The marks / questions / duration above are the official exam pattern. We currently have 53 of this paper’s questions (100% of the full paper), with 53 fully solved. Questions we couldn’t yet extract or verify are held — never shown as complete.

Sections & marks

SectionTypeQuestionsMarks eachTotal
ASection Aobjective38——
BSection Bshort_answer101.515
CSection Clong_answer339
DSection Dessay248
Total5356

The question paper

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

Board Examination

Chemistry

Rajasthan Board Senior Secondary Examination 2026 · Set ANNUAL

Series/Set: ANNUALRoll No. ________
Time Allowed: 3 hr 15 minMaximum Marks: 56

General Instructions

  1. This question paper contains 53 questions divided into 4 sections — A, B, C, D.
  2. Section A comprises 38 questions (objective).
  3. Section B comprises 10 questions of 1.5 marks each (short_answer).
  4. Section C comprises 3 questions of 3 marks each (long_answer).
  5. Section D comprises 2 questions of 4 marks each (essay).

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

Section A

objective · 38 of 38 shown

Q1.
Example of an ideal solution is
  • (a) Mixture of n-hexane and n-heptane
  • (b) Mixture of acetone and chloroform
  • (c) Mixture of acetone and ethanol
  • (d) Mixture of phenol and aniline
[1]
Q2.
The strong electrolyte having maximum value of Van't Hoff factor
  • (i) among the following is
  • (a) NaCl
  • (b) KCl
  • (c) MgSO4
  • (d) K2SO4
[1]
Q3.
Insulator substance among the following is
  • (a) Graphite
  • (b) Teflon
  • (c) Sodium
  • (d) Silver
[1]
Q4.
The order of reaction for thermal decomposition of HI on gold surface is
  • (a) 0
  • (b) 1
  • (c) 2
  • (d) 3
[1]
Q5.
Rate = K [X]^3/2 [Y]^-1. The overall order of reaction for the above rate expression is
  • (a) 1/2
  • (b) 1
  • (c) 3/2
  • (d) 5/2
[1]
Q6.
Transition element among the following is
  • (a) Zinc
  • (b) Cadmium
  • (c) Cerium
  • (d) Rutherfordium
[1]
Q7.
Ion having maximum unpaired electrons is
  • (a) Ti2+
  • (b) V2+
  • (c) Fe2+
  • (d) Ni2+
[1]
Page 1 of 6
Q8.
Ambidentate ligand is (a) H2O (b) NH3 (c) NO2- (d) Cl-
[1]
Q9.
Coordination number of Pt in [Pt(NH3)2 Cl (NO2)] complex is (a) 3 (b) 4 (c) 5 (d) 6
[1]
Q10.
Compound having largest carbon-halogen bond length among the following is (a) CH3F (b) CH3Cl (c) CH3Br (d) CH3I
[1]
Q11.
2CHCl3 + O2 --Light--> [A] + 2HCl. Product [A] in the above reaction is (a) Phosphine (b) Phosgene (c) Methylene chloride (d) Carbon tetrachloride
[1]
Q12.
Wood spirit is (a) Methanol (b) Ethanol (c) Propanol (d) Acetone
[1]
Q13.
Secondary alcohol is (a) Ethyl alcohol (b) Ethylene glycol (c) Isopropyl alcohol (d) Isobutyl alcohol
[1]
Q14.
Weakest acid among the following is (a) HCOOH (b) CH3COOH (c) FCH2COOH (d) ClCH2COOH
[1]
Q15.
Tertiary amine is (a) n-propylamine (b) Isopropylamine (c) Ethylmethylamine (d) Trimethylamine
[1]
Q16.
Hybridised state of nitrogen atom in amine is (a) sp (b) sp2 (c) sp3 (d) sp3d2
[1]
Q17.
Polysaccharide is (a) Ribose (b) Lactose (c) Sucrose (d) Glycogen
[1]
Q18.
Essential amino acid among the following is (a) Glycine (b) Valine (c) Proline (d) Tyrosine
[1]
Page 2 of 6
Q19.
On increasing temperature, solubility of gases in liquids ___ (fill in the blank).
[1]
Q20.
The unit of molal elevation constant is ___ (fill in the blank).
[1]
Q21.
Conductivity of electrolytic solutions ___ with increase of temperature (fill in the blank).
[1]
Q22.
If the value of rate constant for any reaction is found to be 1.75 x 10^-5 L mol^-1 s^-1, then order of reaction will be ___ (fill in the blank).
[1]
Q23.
The element having least enthalpy of atomisation value in the first transition series is ___ (fill in the blank).
[1]
Q24.
The stereoisomers related to each other as non-superimposable mirror images are called ___ (fill in the blank).
[1]
Q25.
The chemical formula of allyl bromide is ___ (fill in the blank).
[1]
Q26.
40% aqueous solution of formaldehyde used to preserve biological specimens is known as ___ (fill in the blank).
[1]
Q27.
The shape of trimethylamine is ___ (fill in the blank).
[1]
Q28.
Scurvy disease is caused by the deficiency of Vitamin ___ (fill in the blank).
[1]
Q29.
Write the solute and solvent in the gaseous solution of chloroform in nitrogen gas.
[1]
Page 3 of 6
Q30.
Write the name of anode used in the mercury cell.
[1]
Q31.
Write the oxidation state of Nickel in Ni(CO)4.
[1]
Q32.
Write the formula for calculating 'spin only' magnetic moment.
[1]
Q33.
Write any one example of low spin complex.
[1]
Q34.
Arrange the following compounds in increasing order of reactivity towards SN2 reaction: CH3-CH2-CH(Br)-CH3 , CH3-C(CH3)(Br)-CH3 , CH3-CH2-CH2-CH2-Br
[1]
Q35.
Write the name of product obtained when vapour of ethyl alcohol are passed over heated Copper at 573 K.
[1]
Q36.
Write general formula of diazonium salt.
[1]
Q37.
Write chemical equation for conversion from methylamine into methylisocyanide.
[1]
Q38.
Write any one difference between DNA and RNA.
[1]
Section B

short_answer · 1.5 marks each · 10 of 10 shown

Q1.
Define azeotrope. Explain minimum boiling azeotrope with the help of example.
[2]
Page 4 of 6
Q2.
800 mL solution was prepared by dissolving 16.0 g of NaOH in water. Calculate the molarity of the solution.
[2]
Q3.
The value of rate constant for any reaction is 2.31 x 10^-13 s^-1. Calculate the half-life for the reaction.
[2]
Q4.
The radii of second and third transition series elements are almost similar. Analyse.
[2]
Q5.
Write the IUPAC name of the following coordination compounds. (a) [Co(NH3)5Cl]Cl2 (b) K3[Al(C2O4)3] [3/4+3/4=1 1/2]
[2]
Q6.
Draw a labelled diagram of splitting of d-orbitals in octahedral crystal field.
[2]
Q7.
Why are aldehyde more reactive towards nucleophilic addition reactions than ketone? Explain.
[2]
Q8.
Write structural formula of the following compounds. (a) Succinic acid (b) Phthalic acid [3/4+3/4=1 1/2]
[2]
Q9.
Draw the resonating structure of aniline.
[2]
Q10.
Explain denaturation of proteins.
[2]
Page 5 of 6
Section C

long_answer · 3 marks each · 3 of 3 shown

Q1.
(a) Write any two differences between order and molecularity of reaction. (b) Derive the expression of integrated rate equation for zero order reaction. [1+2=3] **OR** (a) Differentiate between average rate and instantaneous rate of reaction. (b) Derive the expression of integrated rate equation for first order reaction.
[3]
Q2.
(a) Write chemical equation of Finkelstein reaction. (b) Compare the major products obtained from the reaction of haloalkanes with KCN and AgCN. [1+2=3] **OR** (a) Write chemical equation of Wurtz reaction. (b) Aryl halides are less reactive towards nucleophilic substitution reactions in comparison to alkyl halide. Analyse.
[3]
Q3.
(a) Write the name of aldehyde obtained from Vanilla beans. (b) Complete the following chemical equations and write the main products: (i) C6H5-C(=O)-Cl (benzoyl chloride) --H2/Pd-BaSO4--> __ (ii) CH3COONa --NaOH CaO, Heat--> __ [1+2=3] **OR** (a) Write the name of aldehyde obtained from meadowsweet. (b) Complete the following chemical equations and write the main products: (i) Benzene + CH3-C(=O)-Cl --Anhydrous AlCl3--> __ (ii) CH3COOH --(i) LiAlH4/Ether (ii) H3O+--> __
[3]
Section D

essay · 4 marks each · 2 of 2 shown

Q1.
(a) Define electrode potential. (b) Draw a labelled diagram of fuel cell. (c) Solution of CuSO4 was electrolysed with a current of one ampere for 15 minutes. Calculate the mass of copper deposited at the cathode. (Given: 1F = 96500 C mol^-1) [1+1+2=4] **OR** (a) Define cell potential. (b) Draw a labelled diagram of standard hydrogen electrode. (c) The conductivity of 0.100 M KCl solution at 298 K is 0.0129 S cm^-1. Calculate the molar conductivity of 0.100 M KCl solution.
[4]
Q2.
(a) Write any one example of simple ether. (b) Explain the mechanism of acid catalysed hydration of propene. [1+3=4] **OR** (a) Write any one example of mixed ether. (b) Explain the mechanism of dehydration of propane-2-ol.
[4]
Page 6 of 6