Class 12 Chemistry 2025 Board Paper Solutions | Previous Year Questions (PYQ) Full Explanation CBSE

Описание: CBSE Class 12 Chemistry Board Exam 2026 ke liye ye video ek complete 2025 Chemistry Board Paper discussion hai — Previous Year Questions (PYQ) + Full Step-by-Step Solutions ke saath.
Is lecture me hum MCQs, Assertion-Reason, Numericals, Coordination Compounds, Organic Conversions, Solutions, Electrochemistry jaise important topics ko exam-style approach me solve karte hain, time management + presentation tips ke saath.

What this video covers
2025 Chemistry board paper full solving (PYQ)
MCQ strategy: reading time ka best use + “false statement” traps
Electrochemistry / Redox: charge required, E° cell, ΔG° calculations
Chemical Kinetics: zero order, pseudo-first order, half-life concepts
d & f block / Coordination compounds: isomerism, magnetic behaviour (VBT), IUPAC naming
Organic Chemistry: SN1 vs SN2, named reactions (Wolff–Kishner, Etard, Cannizzaro), conversions
Solutions: vapour pressure (Raoult’s law), osmotic pressure (van’t Hoff factor)
Practical exam tips: units, formula writing, marking-scheme based presentation

Timestamps
0:00 - Comping up
0:44 – Boards strategy: tough paper ke baad bhi preparation continue + time management
3:10 – Online checking me presentation ka importance + marking scheme
4:36 – MCQs approach + reading time tips
5:04 – Electrochemistry (charge / Faraday concept): Mn oxidation state based question
6:38 – False statement trap (molecularity zero नहीं हो सकती)
9:16 – Coordination compounds: linkage isomerism
10:07 – Diamagnetic species (strong field ligand pairing concept)
12:13 – IUPAC naming (chloromethyl benzene type)
13:28 – Organic: oxidation of secondary alcohol → ketone
14:07 – Phenol → salicylic acid (Kolbe reaction)
18:00 – Assertion-Reason: first order half-life concept
23:00 – Numerical: zero order reaction time calculation
26:28 – Zero order NH₃ decomposition: rate of N₂ & H₂ (common student mistake fix)
31:47 – Transition elements colored compounds + Zn not transition
33:17 – Coordination compound IUPAC naming (step-wise rules)
37:15 – Organic: SN1 faster (carbocation stability) + SN2 steric hindrance order
42:10 – Solutions: vapour pressure of urea solution (Raoult’s law)
47:24 – Conductance: resistivity, conductivity, molar conductivity (units focus)
52:54 – Redox equations completion & balancing (KMnO₄ / K₂Cr₂O₇)
55:13 – VBT: hybridization + magnetic character (NH₃ / CO ligands)
1:04:16 – Named reactions + organic conversions (Wolff–Kishner, Etard, Cannizzaro etc.)
1:34:01 – Electrochemistry: ΔG°, spontaneity, E° cell
1:38:48 – EMF calculation (Nernst-type setup begins)

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