12th Class Chemistry Guess Paper 2018

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Chemistry Guess Paper For 12th Class

  • Position of hydrogens, hydroxide, oxides and halides
  • Periods in periodic table.merits and demerits of Mendeleev,s periodic tables..
  • what is lanthnide contraction.
  • metallic oxides are basics and non metallics are acidic why?
  • 2nd electron affinity is exothermic why?.hydration energy it’s factors?.
  • Amphotaric oxides. And question number 7-13 from exercise.
  • Reaction of alkali metals with oxygen and water.
  • Discuss solubility of sulfates and carbonates.
  • Lime mortar. How plaster of Paris is prepared from gypsum.
  • Alkali metals are strong reducing agent why?
  • Slacking of lime.
  • How K02 can be use by mountainer?
  • And question number 7
  • What is iner pairs effect. How borax is prepared by to methods.
  • effects of heat on borax .
  • Uses of borax and Boric acids.
  • Uses of sodium silicates.
  • Peculiar behavior of carbons. Chemical garden.
  • CO2 is gas while SiO2 is solids why?
  • Why silicones are more proffered over petroleum.
  • What is laughing gas it is prepared.
  • What is basic lead and lead chromates. borax bead tests. ortho boric acid is mono basic acid why.
  • Aqua regia.
  • Reaction of nitric acid with bases carbon,phosphorus,sulphur,Cu , Sn. Zn
  • Uses of nitric acids.
  • Reaction of P2O3 and P2O5 with cold & hot water.
  • similarities and dissimilarities of sulphur and oxygen.
  • P2O5 as dehydrating agents.
  • Reaction of sulphuric acid( All)Reaction of NO2 with water and with phosphorus Paperpks.com .ring test. And allotrope of phosphoru.
  • Halogens are oxidizing agents why.
  • Uses of fluorines,chlorine,bromine and iodine separate .
  • How I205 can be used for quantitative analysis of C0. What is available chlorine.
  • How xenon tetra oxide is prepared. Uses of noble gases.
  • Chapter 5 Question number 4 and 6 b  8 b  from exercise.
  • Properties of transition element.
  • Type of steel.
  • Manufacture of steels.
  • Electron chemicals theory.
  • Melting point and its trend. Binding energy and its trend paramagnetism.
  • Typical and non typical transition elements.
  • why transition elements compounds show colors.
  • What is co ordination sphere.
  • What are ligands.
  • What are chelates. Classification of steel.
  • Galvanizing of zinc. And cathode coating. Chromyl chloride test. How KMnO4 is prepared by two methods.
  • Cracking, reforming and geometrical isomerism.
  • How chromates are converted into dichromates. Write reactions of KMnO4 with oxalic acid ferrous sulphate and KIWhat is peculiar nature of carbon.
  • What is natural gas.
  • How anthracite is prepared?
  • What is functional group? Give examples.
  • Acidic nature, halogenation of alkane.kolbe,s electrolytic method,
  • Metamerism.tautomerism and functional group isomerism.
  • Friedel Crafts reactions.
  • Stability of benzene.
  • Nitration sulphanation.
  • Kekule structure and points favoring it.
  • Differentiate between mono and polycyclic aromatic compound.
  • Prepare glyoxal,oxalic acid,maliec acid benzoic acid and meta nitrochloro benzene from benzenes.
  • Prepare benzene by 2 methods specially from alkanes.
  • SN1 ,SN2  and E1 ,E2.
  • Reactivity of alkyd halides.
  • Reactions of Grignerd reagents.
  • Prepare alkyl halite by two methods.
  • Preparation of methanols.
  • Electrophile,nucleotide.
  • Reactions of phenols.
  • Aldol condensation and cannizaro reactions.
  • Acidic nature of phenol.
  • Oxidation and hydration of alcohol.
  • Lucas tests.
  • Williamson,s synthesis.
  • Preparation of formaldehyde and acetaldehyde.
  • Prepare lactic acid from ethanols.
  • Iodoform reaction.
  • Reduction of carbonyl compounds.
  • Addition of sodium sulphite in carbonyl compounds.
  • Uses of acetaldehyde.
  • Reaction of carboxylic acid with bases.
  • Question num 16,17 from exercises.
  • Differentiate between aromatic carboxylic acid and fatty acids.
  • Strecker synthesis.
  • Amino acids are amphoterics.
  • Differentiate between polypeptide and proteins.
  • Reactions of acetic acids.
  • Prepare acetic acid from ethynes.
  • What is zwitter ions.
  • Ester formation, acid halide and amide formations.
  • Disacharide
  • Difference between addition and condensation polymerizations
    POLYAMIDE resins
  • Glycogan and starchs
  • Sponifications
  • Denaturation and importance of protein
  • Sponification numbers
  • Factors effecting enzymes
  • Iodine numbers
  • Steroids
  • Macro and micro nutrient.
  • Diffrentiate between DNA and RNA
  • Phosphorus ki importance and pralling .
  • Heating.
  • Raw materials for cements
  • Components of environment.
  • Smog.
  • Acid rain.
  • Air pollution.
  • Exercise: Q9 to Q16
  • DO,BOD,COD

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