Is the official RBSE Senior Secondary (Class 12) Chemistry exam multiple-choice only?

No. Official RBSE papers mix objective and constructed-response tasks and may include practical/performance components. The 100 questions here are an English-language MCQ study adaptation for concept practice only.

What are full marks and duration for RBSE Chemistry?

Common scheme: Theory 56 + Sessional 14 = 70 and Practical 30 = 100; 3 hours 15 minutes (theory); practical duration as per subject scheme (commonly ~3–4 hours). Confirm the exact scheme for code 041 in the current RBSE syllabus PDF on rajeduboard.rajasthan.gov.in.

What is the passing score?

Minimum 33% marks in the subject as per RBSE examination regulations (confirm current session circulars). Where theory and practical are separate, candidates must pass each component as required by the subject scheme.

How much does the exam cost?

As per RBSE annual examination fee notification for school/private candidates (Senior Secondary / Class 12 full board form fee is notified each cycle on rajeduboard.rajasthan.gov.in — confirm the current circular; subject papers are not separately priced on the statistics page).

Where are official statistics and syllabus?

Subject-wise 2026 result statistics and board materials are published by RBSE at https://rajeduboard.rajasthan.gov.in/statistics2026.htm and syllabus PDFs under anudeshika / books sections of https://rajeduboard.rajasthan.gov.in. Prefer primary board PDFs over third-party summaries.

Is this bank an official RBSE translation?

No. OpenExamPrep publishes one English-language practice bank per exam ID. Target-language terms and texts may appear when they are integral to the skill, but stems, explanations, and SEO copy are English study adaptations — not official translations or language-environment simulations.

How should I use MCQs for a mixed written/practical paper?

Use MCQs for daily concept drills and self-check. Also practise full written answers from RBSE model papers under timed conditions and complete required practicals, projects, or performances.

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100+ Free RBSE SS Chemistry Practice Questions

Rajasthan RBSE Senior Secondary (Class 12) Chemistry — Code 041 practice questions are available now; exam metadata is being verified.

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See RBSE subject-wise statistics for the current cycle on statistics2026.htm. Pass Rate

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2026 Statistics

Key Facts: RBSE SS Chemistry Exam

041

RBSE subject code for Chemistry

RBSE 2026 subject-wise statistics

Theory 56 + Sessional 14

Typical full marks / assessment pattern

RBSE syllabus examination scheme

3 h 15 m

Typical theory paper duration (where applicable)

RBSE Class 12 / Praveshika schemes

33%

Common minimum pass threshold under RBSE regulations

RBSE examination regulations (confirm circular)

2026

Main examination cycle evidenced in official subject-wise statistics

rajeduboard.rajasthan.gov.in/statistics2026.htm

MCQ study aid

Local bank adapts knowledge to four-option MCQs; official paper is mixed/performance format

OpenExamPrep assessment-format policy

RBSE Senior Secondary (Class 12) Chemistry (code 041): Theory 56 + Sessional 14 = 70 and Practical 30 = 100; 3 hours 15 minutes (theory). Pass about 33% per RBSE rules (confirm circular). Fee as per board notification. Free English MCQ study aid — not a full official-format simulation.

Sample RBSE SS Chemistry Practice Questions

Try these sample questions to test your RBSE SS Chemistry exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A solution is prepared by dissolving 0.50 mol of urea (non-volatile, non-electrolyte) in 500 g of water. What is the molality of urea in the solution?

A.0.50 m

B.1.0 m

C.2.0 m

D.0.25 m

Explanation: Molality m = moles of solute / kg of solvent = 0.50 mol / 0.500 kg = 1.0 m. Mass of water is 500 g = 0.500 kg.

2According to Raoult’s law for an ideal binary solution of volatile liquids A and B, the partial vapour pressure of component A is equal to

A.its pure vapour pressure multiplied by its mole fraction in the vapour phase

B.its pure vapour pressure multiplied by its mole fraction in the liquid phase

C.the total pressure multiplied by its mole fraction in the liquid phase

D.its pure vapour pressure divided by its mole fraction in the liquid phase

Explanation: Raoult’s law: p_A = p_A° · x_A, where x_A is the mole fraction of A in the liquid solution and p_A° is the vapour pressure of pure A.

3Which colligative property is preferred for determining the molar mass of a polymer of high molar mass?

A.Relative lowering of vapour pressure

B.Elevation of boiling point

C.Depression of freezing point

D.Osmotic pressure

Explanation: Osmotic pressure (π = CRT) gives measurable effects even for very dilute solutions of high-molar-mass solutes, so it is the preferred colligative method for polymers.

4A 0.10 m aqueous solution of a non-volatile non-electrolyte freezes at −0.186 °C. If K_f for water is 1.86 K kg mol⁻¹, the depression of freezing point confirms that

A.ΔT_f = K_f · m = 0.186 K

B.ΔT_f = K_f / m = 18.6 K

C.ΔT_f = K_f · m² = 0.0186 K

D.ΔT_f is independent of molality for non-electrolytes

Explanation: For a non-electrolyte, ΔT_f = K_f · m = 1.86 × 0.10 = 0.186 K, so the freezing point is −0.186 °C for water.

5Henry’s law states that the solubility of a gas in a liquid at constant temperature is directly proportional to

A.the square of the partial pressure of the gas

B.the partial pressure of the gas above the solution

C.the total pressure of the system only

D.the molar mass of the gas

Explanation: Henry’s law: p = K_H · x (or c = k · p). Solubility of a sparingly soluble gas is proportional to its partial pressure above the liquid at fixed T.

6For a dilute aqueous solution of NaCl (strong electrolyte), the van’t Hoff factor i approaches

A.1

B.2

C.3

D.0.5

Explanation: Complete dissociation of NaCl → Na⁺ + Cl⁻ gives two particles per formula unit, so i ≈ 2 for dilute solutions.

7An ideal solution of two volatile liquids is one in which

A.Δ_mix H = 0 and Δ_mix V = 0

B.Δ_mix H > 0 and Δ_mix V > 0

C.Δ_mix H < 0 and Δ_mix V < 0

D.Δ_mix G = 0

Explanation: For an ideal solution, intermolecular forces A–B equal A–A and B–B averages, so enthalpy and volume of mixing are zero while Δ_mix G is negative (entropy-driven).

8Aqueous glucose (C₆H₁₂O₆) solution of concentration 0.10 mol L⁻¹ at 300 K has osmotic pressure closest to (R = 0.0821 L atm mol⁻¹ K⁻¹)

A.0.82 atm

B.2.46 atm

C.0.246 atm

D.24.6 atm

Explanation: π = CRT = 0.10 × 0.0821 × 300 ≈ 2.463 atm ≈ 2.46 atm for a non-electrolyte.

9In a galvanic cell, the standard electrode potential of Zn²⁺/Zn is −0.76 V and of Cu²⁺/Cu is +0.34 V. The standard EMF of the cell Zn | Zn²⁺ || Cu²⁺ | Cu is

A.1.10 V

B.0.42 V

C.−1.10 V

D.0.34 V

Explanation: E°_cell = E°_cathode − E°_anode = E°_Cu − E°_Zn = 0.34 − (−0.76) = 1.10 V. Copper is reduced (cathode); zinc is oxidised (anode).

10For the half-reaction Zn²⁺ + 2 e⁻ → Zn at 25 °C, the Nernst equation is

A.E = E° − (0.059/2) log [Zn²⁺]

B.E = E° − (0.059/2) log (1/[Zn²⁺])

C.E = E° − (0.059) log (1/[Zn²⁺])

D.E = E° + (0.059/2) log (1/[Zn²⁺])

Explanation: Q for the reduction is 1/[Zn²⁺] (solid Zn activity = 1). Thus E = E° − (0.059/n) log Q with n = 2, so E = E° − (0.059/2) log (1/[Zn²⁺]). Equivalently E = E° + (0.059/2) log [Zn²⁺].

About the RBSE SS Chemistry Practice Questions

Verified exam format metadata for Rajasthan RBSE Senior Secondary (Class 12) Chemistry — Code 041 is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.

100+ Free RBSE SS Chemistry Practice Questions

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Sample RBSE SS Chemistry Practice Questions

About the RBSE SS Chemistry Practice Questions