Is the official RBSE Senior Secondary (Class 12) Agricultural 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 Agricultural 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 038 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 Agricultural Chemistry Practice Questions

Rajasthan RBSE Senior Secondary (Class 12) Agricultural Chemistry — Code 038 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 Agricultural Chemistry Exam

038

RBSE subject code for Agricultural 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) Agricultural Chemistry (code 038): 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 Agricultural Chemistry Practice Questions

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

1Which soil particle size class is smallest and most responsible for high cation exchange capacity in mineral soils?

A.Sand

B.Silt

C.Clay

D.Gravel

Explanation: Clay particles (<0.002 mm) have very high surface area and charge density, so they dominate cation exchange capacity among mineral fractions.

2The pH of a soil suspension is a measure of which property?

A.Total nutrient content

B.Hydrogen ion activity in the soil solution

C.Organic matter percentage

D.Bulk density of the soil

Explanation: Soil pH reports the activity (effective concentration) of H+ ions in the soil solution, commonly on a 0–14 scale.

3A soil with pH 5.2 is best described as:

A.Strongly alkaline

B.Near neutral

C.Acidic

D.Calcareous sodic

Explanation: pH below about 6.5–7 indicates acidity; pH 5.2 is moderately to strongly acidic for agricultural soils.

4Which amendment is most commonly used to raise the pH of acidic agricultural soils?

A.Elemental sulfur

B.Agricultural lime (CaCO3 or dolomitic lime)

C.Ammonium sulfate

D.Aluminum sulfate

Explanation: Agricultural lime neutralizes acidity by supplying carbonate/hydroxide bases that consume H+ and raise soil pH.

5Cation exchange capacity (CEC) is expressed most commonly in which units?

A.kg/ha

B.cmol(+)/kg or meq/100 g soil

C.dS/m

D.% by volume

Explanation: CEC quantifies exchangeable cationic charge and is conventionally reported as cmol(+)/kg (or historically meq/100 g).

6Which primary mineral weathers most rapidly under humid tropical conditions?

A.Quartz

B.Orthoclase feldspar

C.Olivine

D.Muscovite

Explanation: Olivine is a mafic silicate that weathers rapidly; quartz is highly resistant.

7Humus in soil is best described as:

A.Undecomposed fresh crop residue only

B.Stable, dark, colloidal organic matter resistant to rapid further decomposition

C.Pure elemental carbon charcoal

D.Living microbial biomass alone

Explanation: Humus is relatively stable, amorphous organic matter formed by microbial transformation of residues; it improves structure and nutrient retention.

8Which soil order or condition is typically richest in exchangeable sodium and may show poor structure?

A.Acid forest soils with high Al3+

B.Sodic soils with high ESP

C.Pure sandy quartz soils

D.Peat soils dominated by organic matter

Explanation: Sodic soils have high exchangeable sodium percentage (ESP), dispersing clays and degrading structure and infiltration.

9The process by which soluble salts accumulate in the surface soil under arid irrigation is called:

A.Laterization

B.Salinization

C.Podzolization

D.Gleization

Explanation: Salinization is the accumulation of soluble salts (e.g., NaCl, Na2SO4) in the root zone, common in arid irrigated lands.

10Electrical conductivity (EC) of a saturated paste extract is primarily used as an index of:

A.Soil texture class

B.Soluble salt content / salinity hazard

C.Available phosphorus only

D.Bulk density

Explanation: EC of soil–water extracts rises with dissolved ionic salts and is the standard field/lab index of salinity.

About the RBSE SS Agricultural Chemistry Practice Questions

Verified exam format metadata for Rajasthan RBSE Senior Secondary (Class 12) Agricultural Chemistry — Code 038 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 Agricultural Chemistry Practice Questions

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Key Facts: RBSE SS Agricultural Chemistry Exam

Sample RBSE SS Agricultural Chemistry Practice Questions

About the RBSE SS Agricultural Chemistry Practice Questions