BCHCT-131 IGNOU Handwritten Assignment 2026-27

BCHCT-131: Physical Handwritten Assignment Atomic Structure, Bonding, General Organic Chemistry and Aliphatic Hydrocarbons

The handwritten hard copy assignment for BCHCT-131 is designed to align perfectly with the official IGNOU curriculum, covering key topics in Chemistry & Chemical Sciences. Each question is solved with clarity, adhering to the prescribed format and academic standards. The assignment is printed on 80 GSM A4 ruled paper, ensuring readability and professional presentation.

Key Syllabus Coverage (Official IGNOU BCHCT-131)

• Block-1: Atomic Structure
  • Quantum numbers and electron configuration (Aufbau principle, Pauli exclusion principle, Hund’s rule).
  • Spectroscopic methods (UV-Vis, IR, NMR basics) for atomic structure analysis.
  • Periodic trends: Atomic radius, ionization energy, electron affinity, and electronegativity.
• Block-2: Chemical Bonding and Molecular Structure
  • Valence Bond Theory (VBT) and Hybridization (sp, sp², sp³, dsp², d²sp³).
  • Molecular Orbital Theory (MOT) for homonuclear and heteronuclear diatomic molecules.
  • VSEPR Theory and shapes of molecules (linear, trigonal planar, tetrahedral, etc.).
• Block-3: Fundamentals of Organic Chemistry
  • Classification of organic compounds (hydrocarbons, halides, alcohols, etc.).
  • Nomenclature (IUPAC rules) for alkanes, alkenes, alkynes, and their derivatives.
  • Mechanisms: Substitution (SN1, SN2) and Elimination (E1, E2) reactions.
• Block-4: Hydrocarbons
  • Aliphatic hydrocarbons: Alkanes, alkenes, alkynes (structure, isomerism, and reactivity).
  • Reactions: Combustion, halogenation (free radical mechanism), hydration (Markovnikov’s rule).
  • Practical applications: Petrochemicals, fuels, and industrial significance.

Assignment Features

• Handwritten on 80 GSM A4 ruled paper for neatness and readability.
• Includes the official IGNOU front page and printed question paper for seamless submission.
• Delivered via Indian Speed Post to your registered address.
• Solutions are verified for accuracy and adherence to IGNOU guidelines.

Subject-Specific FAQs

• Q: How does hybridization explain molecular geometry?

  A: Hybridization combines atomic orbitals to form new hybrid orbitals, which determine bond angles and molecular shapes. For example, sp³ hybridization in methane (CH₄) results in a tetrahedral geometry with bond angles of 109.5°.

• Q: Why do alkenes undergo addition reactions rather than substitution?

  A: Alkenes have a double bond (π electrons), making them electron-rich and susceptible to electrophilic addition. Substitution reactions typically occur in saturated compounds (e.g., alkanes) due to the absence of π bonds.