II – P U C CHEMISTRYCHAPTERWISE IMPORTANT QUESTIONS + CHAPTER WEIGHTAGE

BY NRS, LECTURER IN CHEMISTRY, I.METALLURGY;(6M) 1. What is an Ellingham's diagram? What are its salient features?----5M2. Write a note on reducing property of carbon & CO. ----3M3. With a neat labeled diagram explain the extraction of cast iron from calcined ore? --- 5M*4. State distribution law.Explain the separation of silver from argentiferrous lead?* --5M 5. Silver oxide (or HgO) is thermodynamically less stable . explain with the help of Ellingham's diagram. --2M II INDUSTRIALLY IMPORTANT COMPOUNDS;(6M)1)With a neat labeled diagram explain the manufacture of a)ammonia by Haber's process----3M b)sodium hydroxide by nelsons cell--4M* c) sulphuric acid by contact process--4M d)potassium di chromate—4M 2) How is conc. Sulphuric acid reacts with a)PCl5 b)HCOOH ------2M 3) How does potassium di chromate reacts with a)KCl b)KOH ----2MIII.GROUP-18 NOBLE GASES;(3M)1. Write the general electronic configuration of noble gases.------1M2. Explain isolation of noble gases from air by Ramsay-Rayleigh's method.3M*3. How is noble gases are separated from a mixture by Dewar charcoal adsorption method?--3M*4. How is Xenon converted in to xenonhexafluoroplatinate?-----2M*IV.d- BLOCK ELEMENTS;(3M)1. Write the general electronic configuration of transition elements.2. Write the electronic configuration of a)Cu b)Cr c)Fe-----1M3. Give reason a) d- block elements forms colored compounds.---2M* b). d- block elements forms complexes-----2MV.COORDINATION COMPOUNDS;(8M)1. What is a complex ion? -----1M2. Give an example for a bidentate ligand. ----1M3. Explain a)linkage isomerism b)ionisation isomerism c)hydrate isomerism---2M*4. Write the postulates of Werner's theory. ------3M*5. Calculate the EAN of a)potassium ferro cyanide b) cuprammonium sulphate6. Explain sp3 hybridisation that takes place in Ni(CO)4 ---4m*7. Explain d2sp3 hybridisation that takes place in potassium ferro cyanide . --4M*8. Explain dsp2 hybridisation that takes place in cuprammonium sulphate.--4M*9. IUPAC nomenclature of a compound-----1M VI.CHEMICAL BONDING; ( 6M)1. Write any four differences between bonding & anti bonding molecular orbitals.---2M2. Write the molecular orbital electronic configuration of a)Li2 b)O2 ----1M*3. Account for the non existence of Helium molecule ----2M*4. On the basis of LCAO explain the formation of bonding & anti bonding molecular orbitals.----4M 5. Write the energy level diagram for formation of O2 molecule . calculate the bond order. predict on magnetic property.------4M* 6. What is a metallic bond?---1M 7. Write a note on electron sea model.-----2M VII.CHEMICAL KINETICS: (7M)1. What is a a) second order reaction . Give an ex. b)pseudo unimolecular reaction . Give an ex. c)zero order reaction . Give an ex. -----2M2. Derive an expression for the rate constant of a first order reaction .---4M*3. Show that k=0.693/t1/2 -2M * (+problems for two marks )4. Write the Arrhenius equation & explain the terms.---2M5. What is meant by a)threshold energy b) energy of activation ---1M VIII.ELECTROCHEMISTRY;1. State Faraday's a) first law of electrolysis b) second law of electrolysis ---2M2. Write the assumptions of Arrhenius theory of electrolytic dissociation .--4M*3. Write the merits of Arrhenius theory of electrolytic dissociation –2M4 Write the limitations of Arrhenius theory of electrolytic dissociation –2M5. Explain Brownsted -Lowry concept of an acid & a base with ex.---2M*6. Explain Lewis concept of an acid & a base with ex.---2M*7. Writing conjugate acid& base---1M*8. Problems on PH ---2M*9.explain the buffer mechanism of a)acetic acid – sodium acetate buffer solution b)ammonium hydroxide- ammonium chloride buffer solution ---3M*10. What is common ion effect?---1M*11. What is solubility product of a sparingly soluble salt?

12. Problems on solubility (AB type, AB2 type and A2B type )----2M13. What is standard hydrogen electrode? How it is constructed?-----4M*14. What are the limitations of SHE?--2M*15. Explain the working of Daniel cell-----3M16. Problems on calculation of cell potentials using single electrode potentials-2MIX.THEORY OF DILUTE SOLUTION (5M)1. What are colligative properties?---1M2. Define the term a) Vapor pressure b)relative lowering of vapor pressure c)osmotic pressure--2M3. State Raoults law.----2M4. How is relative lowering of vapor pressure measured by Ostwald's – Walker dynamic method?*X.CHEMICAL THERMODYNAMICS: (5M)1.What is a) entropy b)a spontaneous process?--1M2. What is the unit of entropy?---1M3. State second law of thermodynamics.--1M4. What is Gibbs free energy?---1M5. Write the equation which relates standard free energy change& equilibrium constant Kp---2M* (+problems)*6. What are the values of ΔH & ΔS for a non spontaneous process?XI. COLLOIDS: (4M)1. Write any four differences between lyophilic & lyophobic sols.---2M2. How is gold sol prepared by Bredigs electric arc method?---2M 3.Explain a)Tyndall effect b)Brownian movement c)electrophoresis ---2M4. State Hardy-Schulz rule.-----1M5. What is gold no. ?XII.SOLID STATE: (3M)1. Distinguish between crystalline & amorphous solids ---2m2. what is a) a unit cell b)meant by co ordination no. of a crystalline solid --1M3. Calculate the no. of particles per unit cell in a) Body centered cube b) Face centered cube ---2M4. What is meant by radius ratio?5. Write the structure of a) sodium chloride b)cesium chloride---2MXIII.CONCEPTS IN ORGANIC CHEMISTRY: (2M)1. Explain with example a) inductive effect b)mesomeric effect c)electromeric effect ----2MXIV.SYNTHETIC ORGANIC CHEMISTRY: (4M)1. How do you convert a)methane to ethane ---2M b)ethane to methane---4M* c)methanol to ethanol---4M* d) ethanol to methanol---4M*XV.ISOMERISM:(4M)1. Explain optical isomerism with an example---2M2. Explain geometrical isomerism with an example.---2M 3. What is a chiral carbon atom ? 1MXVI.HYDROCARBONS -2 (6M)1. With the help of Bayer's strain theory explain the stability of cyclo alkanes -3M2. Elucidate the structure of benzene.----4M3. Explain the mechanism of a)halogenation b) nitration c)sulphonation d)Friedel crafts reaction -------4M*4. Explain Sache-Mohrs theory of strain less rings----2MXVII.HALO ALKANES:(4M)1.Explain with example a) wurtz reaction b)wurtz- fittigs reaction ---2M2. Explain SN1 mechanism of hydrolysis of tertiary butyl bromide ---3M3. Explain SN2 mechanism of hydrolysis of methyl bromide ------3MXVIII.ORGANIC COMPOUNDS CONTAINING OXYGEN: (12M)1. How is phenol manufactured by cumene process?--2M2. Explain a) Kolbes reaction b)Reimer-Tiemanns reaction—2M3. Explain Aldol condensation with an example.---2M4. Explain a) Perkin's reaction b)Cannizzaro's reaction----2M5. Explain the mechanism of Cannizzaro's reaction ----3M6. How is acetic acid manufactured from methyl magnesium iodide ?---2M7. Explain how the relative strength of acetic acid, chloro acetic acid, di & tri chloro acetic acids.--2M XIX.AMINES: (3M)1. How is acetamide converted in to methanamine?--2M2. What is the action of acetyl chloride on ethanamine?---2M3. Write a note on relative basicity of ammonia , methyl ammine, ethyl ammine & aniline----3M

XX.CARBOHYDRATES: (3M)1. What are a) monosaccharides b)oligo saccharides c) poly saccharides—1M2. Write the Howarths structure of a) alpha- D- glucose b) ß- D- Glucose c)alpha- D-fructopyranose d) ß- D-fructopyranose f)alpha- D-fructofuranose g) ß- D-fructofuranose h)sucrose i)maltose---2MXXI.OILS & FATS: (3M)1. Write the general formula of tri glycerides ---2M2. what is saponification ? Give an example.2M3. What is rancidity? How it is prevented?---2M4. How is oils are refined?---2M5. What are drying oils ? Give an example.6. What is iodine value?---1MXXII.AMINO ACIDS & PROTEINS: (3M)1. What is a)a zwitter ion b) iso- electric point? ---1M2. What is a tri peptide? How many amino acid molecules & peptide bonds are present in a tri peptide?---2M

QUESTIONS ON PRACTICAL PART FOR TEN MARKS (very ,. Imp.)1. How is m-dinitro benzene prepared from nitro benzene?---3M2. How is p- bromoacetanilide prepared from acetanilide?---3M3. Explain a) Molisch test b) Benedicts test c)Seliwanoff's test d)Acrolin test e)Biuret test f)xanthoprotic acid test g)Millon test---2M4. Estimate the mass of KMnO4 present in one liter of given solution using standard oxalic acid solution . ----5M5. Estimate the mass of KMnO4 present in one liter of given solution using standard ferrous ammonium sulphate solution . ----5M6. Estimate the mass of ferrous ammonium sulphate solution present in one liter of given solution using standard K2Cr2O7 solution . ----5M

BY NRS, LECTURER IN CHEMISTRY, G P U COLLEGE, SAGAR