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ISC 2019 Chemistry Theory Important Suggestions

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Physical Chemistry
(25 Marks)


Solid state :

  • BCC,  FCC, ccp crystal – unit cell calculation
  • Radius(r) and nearest neighbour distance (d)  relation only.
  • Packing efficiency – bcc, fcc, ccp (no calculation)
  • Octahedral and tetrahedral voids related numericals.
  • Density related numericals (ρ = (Z x m) / (a³ x No))
  • Schottky,  Frenkel defect-in detail.
  • F-center,  NaCl yellow colour,  ZnO
  • n and p type semiconductor, temperature with semiconductor.
  • Co-ordination number.  NaCl,  ZnS type crystal.

Solution :

  • Rasult’s Law, Positive and Negative deviation
  • Colligative Property
  • Elevation of bp. depression in freezing point, osmotic pr. Isotonic Solution
  • Abnormal colligative property. Van’t Hoff factor. i = 1, i>1, i<1
  • Na2SO4 , Glucose, MgCl2 – comparative study of colligative property.

Electrochemistry :

  • Nernst equation for different cell,  numericals, 
  • standard reduction potential(definition),
  • salt bridge, 
  • utility of electrochemical series, 
  • utility of standard reduction potential,
  • cell representation,
  • spontaneity of cell,
  • cell constant (mainly numericals) ,
  • specific equivalent and molar conductance-relation change with dilution,
  • Kohlrausch’s law,  and numerical,
  • cell constant, 
  • Faraday’s law – mainly numericals

Chemical Kinetics :

  • Zero, first order reaction in detail
  • rate law,  half life,  units – numericals, 
  • numerical related to rate equation,  order of reaction

Surface Chemistry :

  • Physical and Chemical adsorption – differences,
  • What is adsorption isotherm,
  • lyuphilic and Lyophobic solutions differences,
  • Dialysis,
  • Ultra-centrifugation,
  • Electrophoresis,
  • Coagulation,
  • Why adsorption is exothermic,
  • peptization,
  • factors which influence the adsorption of a gas on a solid,
  • emulsion,
  • aerosol, jel, foam, example (phase).

Inorganic Chemistry
(20 Marks)


General Principles and Processes of Isolation of Elements :

  • Froth floatation,
  • Leaching,
  • Flux (Example),
  • Calcination,
  • Roasting,
  • Zone refining,
  • electrolyte refining,
  • wrought iron,
  • cast iron,
  • role of NaCN in extraction of silver ore,
  • role of Iodine in refining of Titanium,
  • Role of depressant in froth floatation method,
  • vapour phase refining,
  • extraction of Cu2S – reactions involved.
  • Why Aluminium can’t be extracted by chemical reduction process.
  • Thermite mixture.

p-Block Elements :

  • Inert pair effect – its application,
  • boiling point,
  • thermal stability of H2O, H2S, H2Se, H2Te. Acid strength, Reducing character of H2O, H2S, H2Se, H2Te.
  • Electron gain enthalpy of F, Cl, Br, I.
  • F2 is highly oxidising.
  • Thermal stability, acid strength, reducing character of — HF, HCl, HBr, Hi.
  • Acid strength of oxoacids of halogen.
  • Why interhalogens are more reactive,
  • pseudo halogen—example only.
  • Reactions — Cl2 with NH3, Cl2 with H2S and Na2S2O3, Cl2 with hot and cold NaOH.
  • Liquification and melting and boiling points of noble gases
  • structure of XeF4, XeOF4, XeO3. F2, Cl2, Br2, I2 (bond energy).
  • Tailing of Mercury,
  • O3 reacts with I2, HCl, PbS; H2O2 with PbS, Cl2, KI.

d and f Block Elements :

  • Atomic radii – variation,
  • explanation – catalytic properties,
  • complex formation of d-block elements
  • why Zn, Cd are not Transition elements
  • K2PtCl6 is known but corresponding Ni compound is not known,
  • Cu(II) is paramagnetic but Cu(F) is diamagnetic.
  • Lanthanide contraction,
  • Basicity of La(OH)3 and Lu(OH)3,
  • Atomic radii — Zr, Hf, Misch metal-composition,
  • stainless steel, invar, Alnico-composition,
  • preparation KMnO4 from Pyrolustic Ore,
  • K2Cr2O7 reacts with acidified KI, AgNO3 + KI —> ?

Coordination Compounds :

  • Type of ligands – one example each.
  • Chelate complex,
  • IUPAC nomenclature,
  • Ionisation,
  • hydrate,
  • linkage isomer — example only.
  • Stereoisomerism of — Ma2b2, Ma2bC, M(AA)2b2  type complexes,
  • why NO GI for Tetrahedral complex,
  • Total isomer for [CoCl2(en)2]+ complex.
  • Bonding,
  • magnetic character of [NiCl4]-2, [Fe(H2O)6]+3 , [Fe(CN)6]-3 complexes.

Organic Chemistry
(25 Marks)


Haloalkanes and Haloarenes :

  • Reaction of halogen acids with alcohol,
  • Hunsdiecker  reaction,
  • dehydrohalogenation,
  • Grignard reagent,
  • Wurtz-Fittig,
  • Fittig reaction,
  • chloropicrin,
  • ChCl3 + KOH –> ?,
  • ChCl3  + Ag –> ?,
  • Iodoform reaction.

Alcohols, Phenols and Ethers :

  • Preparation of primary, secondary, tertiary alcohols by Grignard reagent,
  • acid catalyzed hydration of alkene,
  • acid strength of 1° , 2° , 3° alcohol,
  • dehydration, R-OH + SOCl2 –>?,
  • dehydrogenation,
  • Lucas test
  • lower to higher alcohol conversion and vice versa ,
  • acid character of phenol,
  • effect of substituent on the acidity of phenol,
  • Phenol + Br2 / H2O –> ?
  • Phenol + Br2 / CS2 –> ?
  • picric acid,
  • Kolbe’s A Schimdt reaction, salol, aspirin comma oil of wintergreen , reimer tiemann reaction, coupling, gattermann reaction reaction

Aldehydes, Ketones and Carboxylic Acids :

  • Williamson synthesis,
  • R OH + CH2N2 + HBF4 –> ?
  • ether + HI in cold –> ?
  • ether + HI in excess –> ?
  • (CH3COO)2Ca + heat –> ?
  • (HCOO)2Ca + heat –> ?
  • Rosenmund reduction,
  • Reactivity of aliphatic aldehyde and ketone,
  • cyanohydrin formation,
  • Acetals and ketals,
  • 2,4—DNP,
  • RCH2OH (reduction),
  • CH3—CH=CH—CHO + NaBH4 –> ?
  • CH3—CH=CH—CHO + LiAlH4 –> ?
  • Cannizaro reaction
  • aldol
  • cross aldol
  • mesitylene
  • phorone
  • Tischenko reaction
  • Carboxylic acid more acidic than phenol
  • HVZ reaction
  • Distinction between phenol and carboxylic acid
  • How would you prepare Lactic acid from acetaldehyde,
  • How would you prepare ethane from acetaldehyde?
  • Wolf-Kishner
  • Clemenson reduction,
  • Why formic acid reduces Tollen’s reagent?
  • Acid strength of compounds – CH3CH2OH, CH3COOH, ClCH2COOH, C6H5CH2COOH, FCH2COOH

Organic Compounds containing Nitrogen :

  • Stephen’s reduction,
  • R-NO2 + Sn/HCl or LiAlH4 –> ?
  • R-NO2 + Zn / NH4Cl –> ?
  • Nitrobenzene Reduction –> ? 1. Acidic, 2. Neutral, 3. Alkaline medium
  • Amide to Amine
  • Basic character of aliphatic and aromatic amine  (Polar and Non-Polar solvent)
  • Diazotisation
  • RNH2 + HNO2 –> ?
  • Carbylamine reaction
  • Sandmeyer, Balz-Schiemann reaction
  • Aniline does not undergo Friedel-craft reaction, Why?
  • Aniline to Benzene
  • Sulphonilic acid cannot be acylated but its sodium salt can be readily acylated, why?

Biomolecules :

  • Reducing, non-reducing sugar (example) ,
  • osazone,
  • glucose reacts with conc HNO3, Br2/H2O, [Aldohexose, Aldoketose-example]
  • acidic, basic, neutral amino acid-example [zwitter ion – for Alanine, Glycine],
  • Isoelectric Point,
  • What is Peptide bonds,
  • Fibrous and globulour protein,
  • denaturation of protein,
  • vitamin B12 – metal,
  • glycosidic linkage,
  • nucleoside and nucleotide,
  • co-enzyme,
  • avidaminose,
  • glucose heated with Tollen’s reagent,
  • mutarotation

Polymers :

  • Addition, condensation polymer,
  • Elastomer,
  • Vulcanisation,
  • Thermoplastic and Thermosetting polymers,
  • write name of monomer – natural rubber,
  • neoprene,
  • PVC,
  • Teflon,
  • Terylene or Dacron,
  • Nylon-6 or Perlon,
  • Nylon – 66,
  • Buna-S,
  • Buns-N,
  • Homopolymer,
  • Copolymer,
  • what are polyesters, Bakelite,
  • what are Polyamides-example,
  • Low density – High density polythene.

Check Also

ISC 2019 Physics List of Important Topics and Suggestions

Kindly go through the video first : Download PDF of Important Topics :: https://mygfs.in/2UqFI3U :: …

12 comments

  1. Very much thankfull for all ur guidance sir.

  2. Thank you very much for your unconditional help.

  3. Thank uh sir
    Ur videos helped alot in practicals as well!!
    Be blessed😊

  4. Thank you so much for your help ❤️

  5. Thank you sir.

  6. Thank you sir.u r great

  7. Thanks, sir

  8. Sir your suggestions are very helpful

  9. AKSHAT KUMAR SRIVASTAVA

    THANK YOU SO MUCH GFS FOR ALL THE PAINS YOU UNDERGO FOR OUR BRIGHT FUTURE ( ‘ – ‘ )

  10. Thanks a lot sir for Ur proper guidance!!
    You are really like a miracle teacher for us . We will never forget Ur kindness towards sir.
    Thank u sir 😍😍

  11. Thank you sir,

  12. Thanks a lot sir for all the troubles you’ve taken all this while.
    That disclaimer though..XD

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