AP Inter 2nd Year Chemistry Guess Paper 2025

The Andhra Pradesh (AP) Intermediate 2nd Year Chemistry exam is scheduled to take place on March 15, 2025. With only a limited amount of time left, students must enhance their preparation to maximize their scores. The AP Inter 2nd Year Chemistry Guess Paper 2025 is designed to help students understand the exam pattern, marking scheme, and important topics that are likely to appear in the exam.

By practicing with this Chemistry Guess Paper, students can gain confidence and improve their problem-solving skills. This article provides a section-wise breakdown of expected questions with answers, ensuring a well-rounded preparation strategy.

AP Inter 2nd Year Chemistry Exam Pattern 2025

The Chemistry exam consists of three sections:

Section A – Very Short Answer Type Questions (2 Marks each)
Section B – Short Answer Type Questions (4 Marks each)
Section C – Long Answer Type Questions (8 Marks each)

Each section is designed to test different levels of understanding, from basic concepts to in-depth explanations.

Section A: Very Short Answer Type Questions (2 Marks each)

What are isotonic solutions?
- Isotonic solutions are solutions that have the same osmotic pressure across a semipermeable membrane, preventing net movement of solvent molecules.
Explain Poling.
- Poling is a metallurgical process used for refining metals, such as copper, by removing oxidized impurities using reducing agents like wooden poles.
Ammonia is a good complexing agent. Explain with an example.
- Ammonia forms stable complex compounds due to lone pairs on nitrogen. Example: In [Cu(NH₃)₄]²⁺, ammonia stabilizes the copper ion in solution.
State Henry’s Law.
- Henry’s Law states that the solubility of a gas in a liquid is directly proportional to the partial pressure of that gas over the liquid.
What are antibiotics? Give an example.
- Antibiotics are chemical substances that kill or inhibit bacterial growth. Example: Penicillin.
What is vulcanization of rubber?
- Vulcanization is the process of heating natural rubber with sulfur to improve its elasticity and strength.
What are enantiomers?
- Enantiomers are optical isomers that are mirror images of each other and cannot be superimposed.

Section B: Short Answer Type Questions (4 Marks each)

Write about Schottky and Frenkel defects.
- Schottky defect: Missing equal numbers of cations and anions, reducing density.
- Frenkel defect: Displacement of a cation into an interstitial site, maintaining density.
What are hormones? Give one example each for steroid hormones, amino acid derivatives, and polypeptide hormones.
- Hormones are chemical messengers in organisms.
- Steroid Hormones: Testosterone
- Amino Acid Derivatives: Thyroxine
- Polypeptide Hormones: Insulin
Write the differences between calcination and roasting.
- Calcination: Heating an ore in absence of oxygen to remove volatile impurities (e.g., CaCO₃ → CaO + CO₂).
- Roasting: Heating an ore in presence of oxygen to convert sulfides to oxides (e.g., ZnS + O₂ → ZnO + SO₂).
Explain the purification of sulfide ore by froth flotation method.
- Froth flotation is a method where sulfide ores are separated from impurities using pine oil and air bubbles to create froth that collects the ore particles.
Write a note on SN2 reactions.
- SN2 (Substitution Nucleophilic Bimolecular) reactions occur in one step with backside attack, leading to inversion of configuration. Example: CH₃Br + OH⁻ → CH₃OH + Br⁻.
What is catalysis? How is catalysis classified? Give an example.
- Catalysis is the increase in reaction rate due to a catalyst.
- Types:
  - Homogeneous Catalysis (Reactants and catalyst in same phase) – Example: H₂SO₄ in esterification.
  - Heterogeneous Catalysis (Reactants and catalyst in different phases) – Example: Fe in Haber’s process.

Section C: Long Answer Type Questions (8 Marks each)

Write the difference between order and molecularity of a reaction.
- Order: Sum of exponents of concentration terms in rate law.
- Molecularity: Number of reacting molecules in a single step.
- Example: In 2A + B → C, if rate law is Rate = k[A]²[B], then order = 3, but if it occurs in a single step, molecularity = 3.
Describe the manufacture of H₂SO₄ by the contact process.
- Steps:
  1. Oxidation of sulfur to SO₂.
  2. Conversion of SO₂ to SO₃ using V₂O₅ catalyst.
  3. Absorption of SO₃ in H₂SO₄ to form oleum.
  4. Dilution of oleum to obtain H₂SO₄.
Explain the following reactions:
- Aldol Condensation: Aldehydes/ketones with α-hydrogen undergo condensation in presence of a base to form β-hydroxy aldehyde/ketone, which on heating gives α, β-unsaturated compound.
  - Example: 2CH₃CHO → CH₃CH(OH)CH₂CHO → CH₃CH=CHCHO.
- Reimer-Tiemann Reaction: Phenol reacts with chloroform and NaOH to form ortho-hydroxy benzaldehyde (salicylaldehyde).
  - Example: C₆H₅OH + CHCl₃ + NaOH → C₆H₄OHCHO.

Benefits of Using AP Inter 2nd Year Chemistry Guess Paper 2025

Understanding the Exam Pattern – Familiarity with question types.
Time Management – Efficient allocation of time per section.
Focus on Important Topics – Based on past paper analysis.
Boost Confidence – Improves problem-solving ability.

Conclusion

The AP Inter 2nd Year Chemistry Guess Paper 2025 is a valuable resource for students aiming to score high in the upcoming exam. By following this guess paper and implementing effective study strategies, students can ensure comprehensive preparation. Utilize this guide to maximize your marks and perform well in the exam.

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