II – P U C CHEMISTRY



II – P U C CHEMISTRY

CHAPTERWISE IMPORTANT QUESTIONS

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

I.METALLURGY;(6M) 1.what is an Ellingham's diagram? What are its salient features?----5M

2.write a note on reducing property of carbon & CO. ----3M

3.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 ----2M

III.GROUP-18 NOBLE GASES;(3M)

1.Write the general electronic configuration of noble gases.------1M

2.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-----1M

3.Give reason a) d- block elements forms colored compounds.---2M*

b). d- block elements forms complexes-----2M

V.COORDINATION COMPOUNDS;(8M)

1. What is a complex ion? -----1M

2. Give an example for a bidentate ligand. ----1M

3.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 sulphate

6. 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.---2M

2. 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. -----2M

2.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.---2M

5.What is meant by a)threshold energy b) energy of activation ---1M

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

VIII.ELECTROCHEMISTRY;

1. State Faraday's a) first law of electrolysis b) second law of electrolysis ---2M

2. Write the assumptions of Arrhenius theory of electrolytic dissociation .--4M*

3. Write the merits of Arrhenius theory of electrolytic dissociation –2M

4 Write the limitations of Arrhenius theory of electrolytic dissociation –2M

5. 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 )----2M

13.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-----3M

16.problems on calculation of cell potentials using single electrode potentials-2M

IX.THEORY OF DILUTE SOLUTION (5M)

1. What are colligative properties?---1M

2. Define the term

a) vapor pressure b)relative lowering of vapor pressure c)osmotic pressure--2M

3. State Raoults law.----2M

4. 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?--1M

2. what is the unit of entropy?---1M

3.state second law of thermodynamics.--1M

4. what is Gibbs free energy?---1M

5. 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.---2M

2. How is gold sol prepared by Bredigs electric arc method?---2M

3.Explain a)Tyndall effect b)Brownian movement c)electrophoresis ---2M

4. state Hardy-Schulz rule.-----1M

5. what is gold no. ?

XII.SOLID STATE: (3M)

1. Distinguish between crystalline & amorphous solids ---2m

2.what is a) a unit cell b)meant by co ordination no. of a crystalline solid --1M

3.calculate the no. of particles per unit cell in

a) body centered cube

b) face centered cube ---2M

4. what is meant by radius ratio ?

5. write the structure of a) sodium chloride b)cesium chloride---2M

XIII.CONCEPTS IN ORGANIC CHEMISTRY: (2M)

1. explain with example

a)inductive effect b)mesomeric effect c)electromeric effect ----2M

XIV.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---2M

2.Explain geometrical isomerism with an example.---2M

3. What is a chiral carbon atom ? 1M

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

XVI.HYDROCARBONS -2 (6M)

1. With the help of Bayer's strain theory explain the stability of cyclo alkanes -3M

2.Elucidate the structure of benzene.----4M

3. explain the mechanism of a)halogenation b) nitration c)sulphonation d)Friedel crafts reaction -------4M*

4. Explain Sache-Mohrs theory of strain less rings----2M

XVII.HALO ALKANES:(4M)

1.Explain with example a) wurtz reaction b)wurtz- fittigs reaction ---2M

2. Explain SN1 mechanism of hydrolysis of tertiary butyl bromide ---3M

3. Explain SN2 mechanism of hydrolysis of methyl bromide ------3M

ANIC COMPOUNDS CONTAINING OXYGEN: (12M)

1. How is phenol manufactured by cumene process?--2M

2. Explain a) Kolbes reaction b)Reimer-Tiemanns reaction—2M

3. Explain Aldol condensation with an example.---2M

4.Explain a) Perkin's reaction b)Cannizzaro's reaction----2M

5.Explain the mechanism of Cannizzaro's reaction ----3M

6. How is acetic acid manufactured from methyl magnesium iodide ?---2M

7. 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?--2M

2. what is the action of acetyl chloride on ethanamine?---2M

3. 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—1M

2. Write the Howarths structure of a) a- D- glucose b) ß- D- Glucose c)a- D-fructopyranose d) ß- D-fructopyranose f)a- D-fructofuranose g) ß- D-fructofuranose h)sucrose i)maltose---2M

XXI.OILS & FATS: (3M)

1. Write the general formula of tri glycerides ---2M

2.what is saponification ? Give an example.2M

3.what is rancidity? How it is prevented?---2M

4. How is oils are refined?---2M

5.what are drying oils ? Give an example.

6. what is iodine value?---1M

XXII.AMINO ACIDS & PROTEINS: (3M)

1. What is a)a zwitter ion b) iso- electric point? ---1M

2. 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?---3M

2. How is p- bromoacetanilide prepared from acetanilide?---3M

3. Explain a) Molisch test b) Benedicts test c)Seliwanoff's test d)Acrolin test e)Biuret test f)xanthoprotic acid test g)Millon test---2M

4. Estimate the mass of KMnO4 present in one litre of given solution using standard oxalic acid solution . ----5M

5.Estimate the mass of KMnO4 present in one litre of given solution using standard ferrous ammonium sulphate solution . ----5M

6. Estimate the mass of ferrous ammonium sulphate solution present in one litre of given solution using standard K2Cr2O7 solution . ----5M

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

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