INChO 2026 Paper Solutions: Available Soon

INChO 2026 Paper Solutions: The Indian National Olympiad (INO) 2026 exam is a key competition for science and math students. HBCSE organizes it to find young talent. INO helps students prepare for international Olympiads. The INChO 2026 exam, focusing on theoretical chemistry, is held on January 31, 2026. : 

INChO 2026 Exam Details

The Indian National Chemistry Olympiad (INChO) 2026 exam took place on January 31, 2026. HBCSE organized this theoretical chemistry paper. Official INChO 2026 Paper Solutions will be release soon. 

Section A – Physical Chemistry

Focus on core concepts for problem-solving in exams like INChO. Solutions will be available soon. The key topics are as follows-

Thermodynamics

Master state functions (ΔU, ΔH, ΔG, ΔS) and laws: zeroth (thermal equilibrium), first (energy conservation), second (entropy increase), third (absolute zero). Solve cycles (Carnot, Otto) using 

q=nCpΔT

q=nCpΔT, Hess's law, and spontaneity via 

ΔG=ΔH−TΔS

ΔG=ΔH−TΔS. Key: path independence for reversible processes.​

Chemical Kinetics

Understand rate laws (rate=k[A]m[B]n rate=k[A]m[B]n), order/molecularity, Arrhenius equation (k=Ae−Ea/RTk=Ae−Ea/RT). Cover mechanisms (elementary/complex), catalysts, steady-state approximation. Practice half-life (t1/2=0.693kt1/2=k 0.693 for first-order) and temperature effects.

Electrochemistry

Grasp Nernst equation (E=E∘−RTnFln⁡Q E=E∘−nFRT lnQ), Faraday's laws (mass = ItMnFnF ItM), cells (galvanic/electrolytic). Conductance (specific/molar), Kohlrausch law for weak electrolytes. Emphasize equilibrium constants from EMF.

Section B – Organic Chemistry

Emphasize mechanisms and stereoisomerism. Solutions will be available soon here. 

Reaction Mechanism

Classify: homolytic/heterolytic cleavage, types (SN1/SN2, E1/E2, addition/elimination). Arrow pushing for carbocation rearrangements, electrophilic/nucleophilic attacks. Predict products via Hammond postulate.

Stereochemistry

Chirality (R/S via Cahn-Ingold-Prelog), enantiomers/diastereomers, meso forms. Conformations (Newman projections), optical activity. Fischer/Haworth for sugars.

Named Reactions

Core: Aldol, Cannizzaro, Clemmensen, Diels-Alder, Grignard, Heck, Hofmann, Reimer-Tiemann, Sandmeyer, Williamson. Know reagents, conditions, stereoselectivity.

Section C – Inorganic Chemistry

This section contains Periodic properties and bonding. Solutions PDF will be available soon here.

Coordination Compounds

Crystal Field Theory (splitting: Δ_o > Δ_t), isomerism (geometrical/optical), nomenclature. Stability (chelate effect), spectroscopy (d-d transitions). VBT vs CFT limitations.

Periodic Trends

Atomic radius (decreases across period), ionization energy (increases), electronegativity (Pauling scale), metallic character. Exceptions: anomalies in groups 2, 13, 15.

Chemical Bonding

VSEPR (AX_nE_m), Valence Bond Theory (hybridization: sp, sp2, sp3d), Molecular Orbital Theory (bond order = ½(σ - π*)). Hydrogen bonding, lattice energy (Born-Haber).

Importance of INO Answer Key

The INO answer key is crucial for candidates. It helps students understand their performance and ensures fairness in the evaluation. It also allows for challenging any discrepancies found.

• Performance Analysis – Candidates can evaluate their expected score.

• Transparency – Ensures a fair and unbiased evaluation process.

• Error Correction – Allows students to challenge incorrect answers.

Benefits of INChO 2026 Solutions

INChO 2026 Paper Solutions offer significant advantages to students. They serve as a vital tool for academic growth and future preparation.

• Understand correct problem-solving approach.

• Useful for IChO preparation.

• Helpful for future chemistry olympiads.

What is the Next Steps After INChO 2026?

After the INChO 2026 exam, candidates should be aware of the subsequent stages. The evaluation process leads to further selection.

• Evaluation process.

• Shortlisting for Orientation-cum-Selection Camp (OCSC).