Forest Services Chemistry 2025 Paper (Section A)

Maharashtra Government Jobs Other Jobs 2025

  • Year 2025
  • Questions 8
  • Maximum Marks 200
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination Forest Services
Year 2025
Paper Subject - Chemistry
Subject Chemistry
Duration Three Hours
Maximum Marks 200
Number of Questions 8
Question Type Descriptive / Subjective

This dataset combines the Page 1 exam header and Page 2 OCR-corrected Section-A descriptive questions for the Maharashtra Forest Services Main Examination 2025 (Chemistry). It lists Q1 to Q4 with subparts (a)–(d) across two-column layout, detailing topics such as ligand classification, EAN rule, thermodynamics laws, fuel cells, collision theory, quantum numbers, and Born–Haber cycles. Q2 expands into isomerism in coordination compounds, crystal field theory and trans effects, Third Law thermodynamics and Gibbs energy, Clausius–Clapeyron equation, and vaporization enthalpy. Q3 covers Polarography, Daniell cell EMF, reaction kinetics, Schrödinger equation, and particle-in-a-box energy. Q4 addresses molecular orbital theory for diatomic molecules, lanthanide properties, and adsorption isotherms with Bragg’s law. The content supports exam prep and SEO with structured metadata, FAQ potential, and image SEO for both pages. This previous year Maharashtra Forest Services Main Examination question paper (2025) is useful for Other Jobs aspirants preparing for Maharashtra government recruitment. The paper was conducted by MPSC and reflects the official exam pattern, marking scheme and difficulty level seen in recent cycles. Use it for timed practice, topic-wise revision and understanding how questions are framed in the real examination. Download the free PDF on QuizCurrent to read instructions, attempt MCQs and compare your answers with the study notes provided on this page. Key syllabus areas include Forest Services, Chemistry, Thermodynamics, Chemical Kinetics, Electrochemistry, Polarography, Quantum Chemistry, Molecular Orbital Theory. Useful for Forest Services preparation. Helps understand the latest exam pattern. Useful for practice and self-assessment.

Major Topics Covered

  • Forest Services
  • Chemistry
  • Thermodynamics
  • Chemical Kinetics
  • Electrochemistry
  • Polarography
  • Quantum Chemistry
  • Molecular Orbital Theory
  • Coordination Chemistry
  • Crystal Field Theory
  • Thermodynamics Laws
  • Vapor Pressure
  • Gibbs Free Energy
  • Clausius-Clapeyron
  • Daniell Cell
  • Langmuir Adsorption
  • BET Isotherm
  • Bragg's Law
  • X-ray Diffraction
  • Energy in a Box

Why This Paper is Important

  • Useful for Forest Services preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

Instructions

  • सहाराण्द्र वन सेवा मुख्य परीक्षा -2025 दि ०९ मे,2026 2025 T24 BOOKLET NO. 112180 Forest Services Chemistry Maximum Marks: 200 Time Allowed: Three Hours Type of Paper: Conventional/Descriptive Medium: English

  • There are EIGHT questions divided in two Sections, out of which FIVE are to be
  • Question No. 1 and 5 are compulsory.
  • Out of the remaining questions, THREE are to \frac{1}{2} \frac{1}{2} be attempted choosing at least ONE question from each Section.
  • The number of marks carried by a question/sub-question is indicated against it.
  • Keep in mind the word limit indicated in the question if any.
  • Wherever option has been given, only the required number of responses in the serial order attempted
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Excess responses shall not be assessed and shall be ignored.
  • Candidates are expected to answer all the sub-questions of a question together.
  • question is attempted elsewhere (after leaving a few page or after attempting another question) the later sub-question shall be overlooked.
  • Any page or portion of the page left blank in the Answer Booklet must be clearly struck off.
  • Unless otherwise mentioned, symbol and notation have their usual standard meanings. Assume suitable
  • data, if necessary and indicate the same clearly. Neat sketches may be drawn, wherever required.
  • The medium of answer should be mentioned on the answer book as claimed in the application and
  • printed on admission card.
  • The answers written in medium other than the authorized medium will not be assessed and no marks will be assigned to them.
  • Note – Candidates will be allowed to use Scientific (Non-programmable type) calculators.

Questions (page 2)

Q1.

(b) Q1. First and Second Laws of Thermodynamics.

(c) O1. Fuel cells and batteries.

(d) Collision Theory and Transition State Theory. O1.

(e) Quantum numbers and shapes of s, p and d orbitals. Q1. (f) Excess thermodynamic functions and their determination. Q1. Q1. (g) Born-Haber cycle and Valence Bond Theory. (a) Explain isomerism in coordination compounds. Describe Crystal Field Theory, crystal Q2. field splitting in octahedral complexes and its modifications. Explain trans effect and its theory with suitable examples. (b) State and explain Third Law of Thermodynamics. Discuss free energy function and Q2. entropy as a state function. Derive the relation between Gibbs free energy and equilibrium constant.
(c) Derive the Clausius-Clapeyron equation and explain its significance in phase equilibrium. Q2. The vapour pressure of a liquid is 200 mm Hg at 300 K and 400 mm Hg at 320 K. Calculate the enthalpy of vaporization. Q3. (a) Explain the principle, instrumentation and applications of Polarography. The standard electrode potentials are: E\circ(Zn2+/Zn) = -0.76 \text V E\circ(Cu 2 + /Cu) = + 0.34 V Calculate the standard EMF of the Daniell cell. Q3. (b) Derive the differential and integrated rate equations for zero and first order reactions. Explain the characteristics of each order reaction. For a first order reaction, rate constant k =

Q1.

(b) Q1. First and Second Laws of Thermodynamics.

(c) O1. Fuel cells and batteries.

(d) Collision Theory and Transition State Theory. O1.

(e) Quantum numbers and shapes of s, p and d orbitals. Q1. (f) Excess thermodynamic functions and their determination. Q1. Q1. (g) Born-Haber cycle and Valence Bond Theory. (a) Explain isomerism in coordination compounds. Describe Crystal Field Theory, crystal Q2. field splitting in octahedral complexes and its modifications. Explain trans effect and its theory with suitable examples. (b) State and explain Third Law of Thermodynamics. Discuss free energy function and Q2. entropy as a state function. Derive the relation between Gibbs free energy and equilibrium constant.
(c) Derive the Clausius-Clapeyron equation and explain its significance in phase equilibrium. Q2. The vapour pressure of a liquid is 200 mm Hg at 300 K and 400 mm Hg at 320 K. Calculate the enthalpy of vaporization. Q3. (a) Explain the principle, instrumentation and applications of Polarography. The standard electrode potentials are: E\circ(Zn2+/Zn) = -0.76 \text V E\circ(Cu 2 + /Cu) = + 0.34 V Calculate the standard EMF of the Daniell cell. Q3. (b) Derive the differential and integrated rate equations for zero and first order reactions. Explain the characteristics of each order reaction. For a first order reaction, rate constant k =

Q2.

(a) 3 × 10-3 s-1. Calculate the half-life of the reaction.
(c) Write the time-independent Schrödinger wave equation and explain its physical significance. Q3. Derive the expression for energy of a particle in a one-dimensional box. Q4. Describe Molecular Orbital Theory for diatomic molecules. The dipole moment of HCl is 1.08 D and bond length is 1.27 Å. Calculate the percentage ionic character.

(b) Q4. Discuss lanthanide contraction and magnetic and spectral properties of lanthanides. Write the important applications of lanthanides. Calculate the magnetic moment of Gd^{3+} ion.

(c) Q4. Explain Langmuir adsorption isotherm and BET adsorption isotherm. X-rays of wavelength 1.54 Å are diffracted by a crystal at an angle of 30°. Calculate the interplanar spacing using Bragg's law.

Q2.

(a) 3 × 10-3 s-1. Calculate the half-life of the reaction.
(c) Write the time-independent Schrödinger wave equation and explain its physical significance. Q3. Derive the expression for energy of a particle in a one-dimensional box. Q4. Describe Molecular Orbital Theory for diatomic molecules. The dipole moment of HCl is 1.08 D and bond length is 1.27 Å. Calculate the percentage ionic character.

(b) Q4. Discuss lanthanide contraction and magnetic and spectral properties of lanthanides. Write the important applications of lanthanides. Calculate the magnetic moment of Gd^{3+} ion.

(c) Q4. Explain Langmuir adsorption isotherm and BET adsorption isotherm. X-rays of wavelength 1.54 Å are diffracted by a crystal at an angle of 30°. Calculate the interplanar spacing using Bragg's law.

Q3. Q1.
(c) Fuel cells and batteries.

Q4. Q1. (d) Collision Theory and Transition State Theory.

Q5. Q1. (e) Quantum numbers and shapes of s, p and d orbitals.

Q6. Q1. (f) Excess thermodynamic functions and their determination.

Q7. Q1. (g) Born-Haber cycle and Valence Bond Theory.

Q8. Q2. (a) Explain isomerism in coordination compounds. Describe Crystal Field Theory, crystal field splitting in octahedral complexes and its modifications. Explain trans effect and its theory with suitable examples.

Q9. Q2. (b) State and explain Third Law of Thermodynamics. Discuss free energy function and entropy as a state function. Derive the relation between Gibbs free energy and equilibrium constant.

Q10. Q2.
(c) Derive the Clausius-Clapeyron equation and explain its significance in phase equilibrium.

Question paper preview

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Frequently asked questions

What is the examination name and year?

Forest Services Main Examination, Chemistry subject, 2025.

What is the maximum marks and duration?

Maximum marks 200; duration is three hours.

Which language is the question paper in?

Medium: English.

How many questions are in Section A?

Eight questions in total, with Q1 and Q5 compulsory; others to be attempted as per instructions.

Which topics are covered in Q1?

Q1 covers ligands, EAN rule, thermodynamics laws, fuel cells, collision theory, quantum numbers, excess thermodynamic functions, Born-Haber cycle.

What is the standard EMF of the Daniell cell given Zn2+/Zn and Cu2+/Cu?

E°(Daniell cell) = E°(Cu2+/Cu) – E°(Zn2+/Zn) = 0.34 – (-0.76) = 1.10 V.

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