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100+ Free RBSE Secondary Science Practice Questions

Rajasthan RBSE Secondary (Class 10) Science — Code 007 practice questions are available now; exam metadata is being verified.

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2026 Statistics

Key Facts: RBSE Secondary Science Exam

7

RBSE subject code for Science

RBSE Secondary/Praveshika 2026 subject-wise statistics

80 + 20

Typical Theory + Sessional full marks pattern (total 100)

RBSE Class 10 syllabus examination scheme

3 h 15 m

Typical theory paper duration

RBSE Class 10 syllabus

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 format

OpenExamPrep assessment-format policy

RBSE Secondary (Class 10) Science (code 7): mixed board paper, typically Theory 80 + Sessional 20 = 100, 3h15m. Pass about 33% per RBSE rules. Fee as per board notification. Free English MCQ study aid — not a full mixed-paper simulation.

Sample RBSE Secondary Science Practice Questions

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

1Which process produces a new chemical substance and is therefore a chemical change?
A.Melting of ice into water
B.Burning of a magnesium ribbon in air
C.Crushing a glass bottle into pieces
D.Dissolving table sugar in water
Explanation: Burning magnesium forms magnesium oxide, a new substance, so the change is chemical.
2The reaction Zn + CuSO₄ → ZnSO₄ + Cu is an example of a:
A.Combination reaction
B.Decomposition reaction
C.Displacement reaction
D.Double displacement reaction
Explanation: Zinc is more reactive than copper, so it displaces copper from copper sulphate solution.
3When silver chloride is exposed to sunlight, it turns grey due to formation of:
A.Silver oxide
B.Silver metal
C.Silver nitrate
D.Chlorine water only
Explanation: 2AgCl → 2Ag + Cl₂ (photochemical decomposition); grey silver metal deposits.
4In the balanced equation Fe + H₂O → Fe₃O₄ + H₂ (steam), the coefficient of Fe on the reactant side is:
A.1
B.2
C.3
D.4
Explanation: Balanced: 3Fe + 4H₂O → Fe₃O₄ + 4H₂, so the coefficient of Fe is 3.
5A reaction in which heat is absorbed from the surroundings is called:
A.Exothermic
B.Endothermic
C.Neutralisation
D.Combustion
Explanation: Endothermic reactions absorb heat; the surroundings cool.
6Carbon (12 g) reacts completely with oxygen (32 g) to form carbon dioxide. By the law of conservation of mass, the mass of CO₂ produced is:
A.12 g
B.32 g
C.44 g
D.20 g
Explanation: C + O₂ → CO₂; mass of products equals mass of reactants when reaction is complete: 12 g + 32 g = 44 g.
7Iron objects left in moist air slowly form a reddish-brown coating. This process is mainly:
A.A physical change of state only
B.Oxidation of iron in the presence of air and moisture
C.Reduction of iron by oxygen
D.Displacement of iron by pure dry water alone
Explanation: Rust is hydrated iron(III) oxide formed when iron reacts with oxygen and moisture (oxidation).
8Blue litmus paper is dipped in a dilute acid solution. The expected colour change is:
A.It remains blue
B.It turns red
C.It turns green
D.It becomes colourless
Explanation: Acids turn blue litmus red.
9At 25 °C, a truly neutral aqueous solution has a pH value of:
A.0
B.7
C.14
D.1
Explanation: At 25 °C, pure water and neutral solutions have pH 7.
10Which gas is evolved when dilute HCl reacts with zinc metal?
A.Oxygen
B.Hydrogen
C.Chlorine
D.Carbon dioxide
Explanation: Zn + 2HCl → ZnCl₂ + H₂; hydrogen gas is evolved.

About the RBSE Secondary Science Practice Questions

Verified exam format metadata for Rajasthan RBSE Secondary (Class 10) Science — Code 007 is pending. The practice questions above remain available while official exam length, timing, passing score, fee, and administrator details are reviewed.