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Free Practice Questions for RBSE SS Env Sci

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Key Facts: RBSE SS Env Sci Exam

061

RBSE subject code for Environmental Science

RBSE 2026 subject-wise statistics

100

Typical full marks for the subject scheme

RBSE syllabus examination scheme

3.15 hrs

Typical theory paper duration

RBSE Class 12 / Varishtha Upadhyaya syllabus scheme

33%

Typical minimum pass marks (confirm circular)

RBSE examination regulations

100

Free English MCQ study questions on this page

OpenExamPrep practice bank

RBSE Senior Secondary (Class 12) Environmental Science (code 061) is a real Board of Secondary Education, Rajasthan public-examination subject with appeared candidates in the 2026 main examination subject-wise statistics. Typical scheme: Theory 56 + Sessional 14 = 70 and Practical 30 = 100; passing generally 33% (and separate practical pass where applicable). Use these free MCQs for theory revision only.

Sample RBSE SS Env Sci Practice Questions

Try these sample questions to review concepts for the RBSE SS Env Sci exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which gas is the primary constituent of photochemical smog formation along with hydrocarbons?
A.Argon
B.Helium
C.Neon
D.Nitrogen oxides (NOx)
Explanation: Photochemical smog forms when nitrogen oxides and volatile hydrocarbons react under sunlight to produce ozone and other oxidants.
2The term BOD in water quality stands for:
A.Biological Oxygen Demand
B.Basic Organic Density
C.Buffered Oxide Deposit
D.Bacterial Oil Dilution
Explanation: BOD measures the amount of dissolved oxygen consumed by microbes while decomposing organic matter in water; high BOD indicates heavy organic pollution.
3Minamata disease is associated with chronic poisoning by which heavy metal?
A.Sodium
B.Mercury
C.Iron
D.Calcium
Explanation: Minamata disease in Japan was caused by methylmercury contamination of seafood from industrial discharge.
4Itai-itai disease is linked to long-term exposure to which metal?
A.Gold
B.Silver
C.Platinum
D.Cadmium
Explanation: Itai-itai disease in Japan resulted from cadmium-contaminated rice and water, causing severe bone pain and kidney damage.
5Noise pollution is commonly measured in which unit?
A.Pascal only
B.Joule only
C.Lux
D.Decibel (dB)
Explanation: Sound intensity level is expressed in decibels (dB); environmental and occupational noise standards use dB(A) weighting.
6Particulate matter PM2.5 refers to particles with diameter less than or equal to:
A.2.5 micrometres
B.2.5 millimetres
C.2.5 centimetres
D.2.5 metres
Explanation: PM2.5 particles are 2.5 µm or smaller and can penetrate deep into lungs and enter the bloodstream.
7Eutrophication of lakes is mainly accelerated by excess inputs of:
A.Pure distilled water only
B.Inert sand alone
C.Dissolved gold
D.Nitrogen and phosphorus nutrients
Explanation: Nutrient enrichment, especially nitrogen and phosphorus from sewage and agricultural runoff, drives algal blooms and oxygen depletion.
8Which secondary air pollutant is a major component of photochemical smog?
A.Molecular nitrogen (N2)
B.Helium
C.Ground-level ozone (O3)
D.Argon
Explanation: Ground-level ozone is formed secondarily from NOx and VOCs under sunlight and is a key oxidant in photochemical smog.
9Acid rain typically has a pH value:
A.Exactly 14
B.Always above 10
C.Exactly 7 with no variation
D.Below about 5.6
Explanation: Natural rain is mildly acidic (~5.6) due to CO2; acid rain from SOx and NOx is more acidic (often pH 4–5 or lower).
10Which disease is classically linked to prolonged arsenic-contaminated groundwater exposure?
A.Rickets only
B.Night blindness only
C.Arsenicosis with skin lesions and cancers
D.Scurvy only
Explanation: Chronic arsenicosis from contaminated wells causes skin pigmentation changes, keratosis, and increased cancer risk.

About the RBSE SS Env Sci Exam

Free English-language MCQ practice for Rajasthan RBSE Senior Secondary (Class 12) Environmental Science (code 061), covering topics from official board syllabus scope and 2026 subject-wise result statistics. This bank is a study adaptation for concept practice — not an official paper simulation or practical substitute.

Exam sponsor: Board of Secondary Education, Rajasthan (RBSE), Ajmer. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Official RBSE mixed written theory plus separate practical/viva components. Typical full marks pattern Theory 56 + Sessional 14 = 70 and Practical 30 = 100, theory duration 3 hours 15 minutes. Candidates must often pass theory and practical separately. Local bank: English-language four-option MCQ study adaptation — not a practical/performance simulation. Official delivery commonly English/Hindi. Subject code 061.

Time Limit

3 hours 15 minutes (theory); practical duration as per subject scheme (commonly ~3–4 hours)

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.

Exam / Certification Fees

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)

Exam sponsor website

Reported exam pass rate: See RBSE subject-wise statistics for the examination year (statistics2026.htm).. This describes exam candidates, not OpenExamPrep users or results from using our resources. Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

25%

Environmental Pollution and Human Health

Air, water, soil, noise pollution and health effects.

20%

Natural Resources

Forest, wildlife, water, mineral, and soil resources.

25%

Environment and Society

Industrialisation, urbanisation, movements, rainwater harvesting, disasters.

15%

Biodiversity and Ecosystems

Ecosystem structure, biodiversity conservation.

15%

Green Technology and Practical Skills

Solar/wind technologies, testing methods, project skills.

Preparing for the RBSE SS Env Sci Exam

What You Need to Know

  • 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.
  • Assessment: Official RBSE mixed written theory plus separate practical/viva components. Typical full marks pattern Theory 56 + Sessional 14 = 70 and Practical 30 = 100, theory duration 3 hours 15 minutes. Candidates must often pass theory and practical separately. Local bank: English-language four-option MCQ study adaptation — not a practical/performance simulation. Official delivery commonly English/Hindi. Subject code 061.
  • Time limit: 3 hours 15 minutes (theory); practical duration as per subject scheme (commonly ~3–4 hours)
  • Exam / certification fees: 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) Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

RBSE SS Env Sci: Suggested Study Strategy

1Start with the official unit list for code 061 and weight high-mark units first.
2Use MCQs to diagnose weak concepts, then rewrite answers in your own words.
3Complete practical/sessional work on the school timeline — MCQs do not replace it.
4Practice previous RBSE model papers when published for constructed-response timing.
5Track errors by topic and re-test those categories after 48 hours.

Frequently Asked Questions

Is the official RBSE Environmental Science exam multiple-choice only?

No. Official RBSE papers mix objective and constructed-response tasks; subjects with practical or skill components also require that evidence. The 100 questions here are an English-language MCQ study adaptation for concept practice only.

What is the subject code for RBSE Environmental Science?

RBSE lists Environmental Science under subject code 061 in the 2026 main examination subject-wise statistics.

What is the typical passing standard?

RBSE generally requires minimum 33% in the subject; where theory and practical are separate, candidates must meet the scheme for each component. Confirm the current session circular.

Where can I find the official syllabus?

Download board syllabus materials from rajeduboard.rajasthan.gov.in (Class 12 syllabus PDF).