Sample NET Chemistry Exam Paper: Structure and Questions

Below is a representative UGC-NET Chemistry question paper structure (3 hours, 100 marks) based on the current syllabus. Note: This is a sample for practice; actual papers vary.

Section A: Compulsory Short Answers (10 × 2 = 20 Marks)

1. Electronic configuration of carbon in ground state.
2. Difference between σ and π bonds.
3. Hybridization of carbon in benzene.
4. Functional group in aldehydes.
5. Distinguish primary, secondary, tertiary alcohols.
6. Product of alkene + HBr / peroxide (anti-Markovnikov).
7. Name of reaction: alkane → alkyl halide (free radical halogenation).
8. Structure: aldehyde + primary amine → imine (Schiff base).
9. Peptide bond vs. glycosidic bond.
10. Structure of DNA (double helix, base pairing).

Section B: Long Answers (Choose 5 of 8, 5 × 10 = 50 Marks)

1. Bohr model of atom & limitations.
2. Ionization energy trends across periodic table.
3. Molecular orbital theory applied to CO₂ bonding.
4. Mechanism of nucleophilic substitution (SN1/SN2) in alkyl halides.
5. Resonance concept & stabilization role.
6. Stereochemistry of alkenes & electrophilic addition.
7. Synthesis of aniline from benzene (nitration → reduction).
8. Diels-Alder reaction mechanism & synthetic applications.

Section C: Essay/Advanced (Choose 2 of 3, 2 × 15 = 30 Marks)

1. Intermolecular forces (van der Waals, H-bonding, dipole-dipole, ion-dipole) & effect on physical properties (bp, mp, solubility, viscosity).
2. Chromatography principles (partition, adsorption, ion-exchange, size-exclusion, affinity) & applications in separation/analysis.
3. Thermodynamics in chemical reactions: ΔG, ΔH, ΔS, equilibrium constant, Le Chatelier, spontaneity, coupling.

Preparation Tips

• Master NCERT (11th & 12th) + standard texts (Clayden, Atkins, Shriver & Atkins, Miessler).
• Solve last 10 years' papers (NTA website).
• Focus on reaction mechanisms, spectroscopy, coordination chemistry, quantum chem.
• Time management: 1 min/mark.

Official syllabus & past papers: ugcnet.nta.nic.in.