About this previous year paper
This question paper is divided into three sections: A, B, and C, and students must attempt all sections. Answers may be written in Hindi, English, or a mixed language as per convenience.
SECTION A — Very Short Answer (20 Marks)
Students must attempt all 10 questions, each carrying 2 marks.
Topics covered include:
Paramagnetism of H₂, H₂⁺, H₂⁻
Diatomic nature of Lithium vs monoatomic Beryllium
Distinguishing benzene & anthracene using UV spectroscopy
Vibrational modes in linear & non-linear molecules
Corrosion of iron nails
Salt bridge & its function
Gross vs Net calorific value
Temporary hardness removal by boiling
Biodegradable polymers
Functionality of monomers
SECTION B — Short Answer (30 Marks)
Students must attempt any 3 questions, each of 10 marks.
Topics include:
MO diagram of NO + bond order + magnetic behaviour
Fingerprint region in IR & structure prediction using absorption bands
Phase, component, degree of freedom + phase diagram of water
Resins & ion exchange process vs lime–soda process
Preparation, properties & applications of polymers: Buna-S, Dacron, Nylon-6, Neoprene
SECTION C — Long Answer (30 Marks)
Students must attempt one question from each of Q3, Q4, Q5, Q6, Q7.
Q3 – 10 Marks
Anisotropic crystals, classification & applications OR
Allotrope of carbon (Fullerene), preparation, structure & applications
Q4 – 10 Marks
Quantum theory of Raman spectroscopy + Stokes/anti-Stokes/Rayleigh lines OR
Electronic transitions in UV-Visible spectroscopy, solvent effects, absorption & intensity shifts
Q5 – 10 Marks
Primary vs secondary batteries + lead storage battery OR
Electrochemical theory of corrosion + anodic & cathodic inhibitors
Q6 – 10 Marks
Continuous cold lime–soda process + numerical OR
Bomb calorimeter, construction, working + GCV & NCV numerical
Q7 – 10 Marks
Polymer blends + Grignard reagent OR
Conducting polymers — classification & applications
This KAS-102 Chemistry question paper contains three sections covering molecular structure, spectroscopy, corrosion, polymers, phase rule, calorimetry, batteries, and water treatment. Students must answer very short, short, and long descriptive questions including numericals and applications.