BCHCT-137 Notes Hindi Medium PDF – IGNOU Study Notes (All 14 Units)

📖 BCHCT-137 Notes: what this PDF covers

BCHCT-137 Notes is a complete unit-wise revision PDF for IGNOU BCHCT-137 (समन्वय रसायन, द्रव्य की अवस्थाएँ और रासायनिक बलगतिकी). It is written in simple Hindi.

All 14 units of the official syllabus are covered in order. Each unit gives clear definitions, key laws, equations and solved ideas.

Every unit ends with key terms and likely exam questions. So these BCHCT-137 notes work well for quick revision before the term-end exam.

🧩 BCHCT-137 Notes – unit-wise topics

Block 1: d and f Block Elements

• Unit 1: संक्रमण तत्व-I – Electronic configuration of transition elements; General characteristics and periodic trends: atomic radii, atomic volume and density; Melting and boiling points, ionization enthalpy, electrode potential, electronegativity; Oxidation states; Stability of various oxidation states for Mn, Fe and Cu; Latimer diagrams.
• Unit 2: संक्रमण तत्व-II – Formation of complexes; Colour of transition metal compounds; Magnetic properties; Catalytic properties; Alloys and interstitial compounds.
• Unit 3: आंतर संक्रमण तत्व – Electronic configuration and position in the periodic table; Lanthanoids: general characteristics, atomic radii, melting and boiling points, densities, ionization enthalpy; Oxidation states, colour of ions, electrode potentials and magnetic properties; Lanthanoid contraction; Separation of lanthanoids (ion-exchange method).

Block 2: Coordination Chemistry

• Unit 4: समन्वय रसायन-I – Werner's coordination theory; Basic definitions: complex, coordination entity, ligands; Chelation and coordination number; Oxidation state of the central metal; Nomenclature of coordination compounds.
• Unit 5: समन्वय रसायन-II – Isomerism in coordination compounds; Structural isomerism (coordination numbers 4 and 6); Stereoisomerism (coordination numbers 4 and 6); Theories of bonding: valence bond theory; Inner and outer orbital complexes of Cr, Fe, Co, Ni and Cu.
• Unit 6: क्रिस्टल क्षेत्र सिद्धांत-I – Crystal field theory; Crystal field splitting in octahedral complexes; Crystal field stabilization energy (CFSE); Weak and strong fields; Factors affecting the magnitude of crystal field splitting energy; spectrochemical series; crystal field effects.
• Unit 7: क्रिस्टल क्षेत्र सिद्धांत-II – Crystal field splitting in tetrahedral complexes; Comparison of CFSE for octahedral and tetrahedral complexes; Crystal field splitting in square planar complexes; Tetragonal distortion of octahedral geometry; Jahn-Teller distortion; square planar coordination; Some common applications of complexes.

Block 3: States of Matter

• Unit 8: गैसों का अणुगति सिद्धांत – Recapitulating gas laws: Boyle's, Charles', Gay Lussac's and Avogadro's law; ideal gas equation; Equation of state for ideal gases and Dalton's law of partial pressure; Kinetic theory of gases: derivation of the expression for pressure of a gas; Average kinetic energy, mean square speed and root mean square speed; distribution of molecular speeds; Principle of equipartition of energy, intermolecular collisions and mean free path.
• Unit 9: वास्तविक गैसें और उनका द्रवण – Deviation from ideal gas behaviour; van der Waals equation; Critical phenomenon, critical point and critical constants; relation with van der Waals constants; Law of corresponding states; liquefaction of gases (Linde's and Claude's methods); Viscosity of gases and its relation with mean free path.
• Unit 10: द्रव – Comparison of liquids with gases and solids; Intermolecular forces: van der Waals forces, hydrogen bonding and their effect on physical properties; Structure of liquids; Surface tension and its determination; Viscosity of a liquid, determination of coefficient of viscosity, and effect of temperature.
• Unit 11: ठोस-I – Amorphous and crystalline solids; Symmetry elements; Terms used in crystal systems: lattice, basis, unit cell; Bravais lattices and crystal systems; cubic system geometry; Laws of crystallography (constancy of interfacial angles, rational indices); crystal planes and Miller indices.
• Unit 12: ठोस-II – X-ray diffraction: principle of diffraction and Bragg's law; Characteristics of cubic unit cells: number of net atoms in a cubic unit cell; Packing efficiency in simple cubic, BCC, FCC (HCP and CCP); formula of a compound and number of voids filled; Defects in crystals; Glasses and liquid crystals.

Block 4: Chemical Kinetics

• Unit 13: रासायनिक बलगतिकी-I – Chemical kinetics and its significance; Rate of a chemical reaction: defining, calculating and measuring the rate; Factors affecting the rate of a reaction; Rate laws: differential and integrated rate laws; Zeroth order, first order and second order reactions.
• Unit 14: रासायनिक बलगतिकी-II – Determination of order of a reaction: initial rate, graphical (trial and error), half-life and isolation methods; Temperature dependence of reaction rates; Arrhenius equation; Theories of reaction rates: collision theory and activated complex theory; Collision theory and Arrhenius equation.

✍️ How to study with BCHCT-137 Notes

First read one unit from the BCHCT-137 notes. Then try the exam focus questions without looking.

Mark weak topics and read them again from your SLM book. Revise the key terms list a day before the exam.

For the official syllabus and exam dates, visit the IGNOU website. More subject notes are in our IGNOU Subject Notes section.

📋 BCHCT-137 Notes – PDF Details

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📚 Units covered (official syllabus)

Block 1: d and f Block Elements

• Unit 1 — संक्रमण तत्व-I
• Unit 2 — संक्रमण तत्व-II
• Unit 3 — आंतर संक्रमण तत्व

Block 2: Coordination Chemistry

• Unit 4 — समन्वय रसायन-I
• Unit 5 — समन्वय रसायन-II
• Unit 6 — क्रिस्टल क्षेत्र सिद्धांत-I
• Unit 7 — क्रिस्टल क्षेत्र सिद्धांत-II

Block 3: States of Matter

• Unit 8 — गैसों का अणुगति सिद्धांत
• Unit 9 — वास्तविक गैसें और उनका द्रवण
• Unit 10 — द्रव
• Unit 11 — ठोस-I
• Unit 12 — ठोस-II

Block 4: Chemical Kinetics

• Unit 13 — रासायनिक बलगतिकी-I
• Unit 14 — रासायनिक बलगतिकी-II

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