Atomic Structure II

3 Mark Questions

1. State Heisenbergs Uncertainty principle. [March 06, 08, Oct 07, 09]

2. What are the conditions for effective hydrogen bonding? [Oct 06]

3. Distinguish between a particle and a wave. [June 06]

4. Why is He2 not formed? or He2 is hypothetical why? [Mar 07, Oct 08]

5. What is bond order? [June 07]

6. What is significance of negative electronic energy? [June 08, 09]

7. Define hybridization [March 09].

5 Mark Questions

1. Explain the formation of oxygen molecule by molecular orbital theory.

[March 06, June 06, Oct 07]

2. Discuss Davisson and Germers experiment. [March 07]

3. Derive de Broglies equation. What is its significance? [Oct 06, June 07]

4. Explain the formation of N2 by molecular orbital theory? [June 08, Oct 08, June 09]

5. Give any five postulates of molecule orbital theory. [March 08]

6. The uncertainty in the position of a moving bullet of mass 10 g is 10-5 m. Calculate the

uncertainty in its velocity. [March 09]

7. The wavelength of a moving body of mass 0.1 mg is 3.31 10-29 m. Calculate its kinetic

energy. [Oct 09]

Periodic Classification II

3 Mark Questions

1. Why is electron affinity of fluorine less than that of chlorine? [March 06, June 09]

2. Why is the first ionization energy of Beryllium greater than that of Lithium? [June 06]

3. Explain why the first ionizations energy of Be is greater than that of B. [Oct 06, June 08]

4. Compare the ionization energy of nitrogen with that of oxygen. [March 07]

5. If the d (C CI) is 1.76 and r (CI) is 0.99 , find the radius of carbon atom. [June 07]

6. Calculate the effective nuclear charge experienced by the 4s electron in potassium

atom. [Oct 07]

7. Define electron affinity. [March 08]

8. Mention the disadvantages of Pauling and Mullikans electro negativity Scale. [Oct 08]

9. Ionization energy of Neon is greater than that of Fluorine. Give reason. [March 09]

10. Why Ionization energy of Fluorine greater than that of oxygen. [Oct 09]

5 Mark Questions

1. Explain Paulings method to determine ionic radii. [March 06, Oct 09]

2. Explain the various factors that affect electron affinity. [June 06, Oct 06, March 07, June

07, March 09]

3. Explain the Pauling scale for the determination of electro negativity. Mention the

disadvantage of Pauling Scale. [March 08]

4. Explain various factors which influence ionization energy. [ June 08]

5. How are electro negativity values useful in finding out the percentage of ionic character

of polar covalent bond? [Oct 08]

6. How do electronegativity values help to find out the nature of bonding between atoms?

[Oct 07, June 09].

p Block Elements

3 Mark Questions

1. H3PO4 is triprotic. Prove. [March 06]

2. Prove that phosphorous acid is a powerful reducing agent. [June 06]

3. Write a note on plumbo solvency. [June 06, Oct 06, June 07, 09]

4. Prove that P2O5 is a powerful dehydrating agent. [Oct 06, March 09]

(OR)

5. Illustrate the dehydrating property of phosphorus pentoxide (P2O5) with two examples.

[March 07]

6. Why is HF not stored in silica or glass bottles? Write the equation.[March 07]

7. Illustrate the oxidizing power of fluorine.[June 07]

8. Write the uses of Helium. [Oct 07]

9. Write about the Holmes signal. [Oct 07, 09]

10. How is potash alum prepared? [March 08]

11. Draw the electronic structure of H3PO3 [March 08]

12. How phosphoric acid is prepared in the laboratory? [June 08]

13. Give the uses of neon. [June 08]

14. Give the electronic structure of i) H3PO3 ii) PCl5 [Oct 08]

15. What are the interhalogen compounds? Give preparation of any one. [Oct 08]

16. What is inert pair effect? [March 09]

17. What happens when phosphorus acid is heated? [June 09]

18. H3PO3 is diprotic why? [Oct 09].

5 Mark Questions

1. How is fluorine isolated from their fluorides by Dennis method? [March 06, Oct 09]

2. Describe in detail how noble gases are isolated by Dewars method.

[June 06, June 09]

3. Mention the uses of silicones. [March 07]

4. Describe in detail how noble gases are isolated from air by Ramsay Raleighs method.

[Oct 06]

5. Illustrate i) tribasic nature of orthophosphoric acid ii) reducing property of phosphorus

acid [June 07]

6. Discuss the structure of interhalogen compounds of AX and AX5 type [Oct 07]

7. How does fluorine differ from other halogen compounds. [March 08, 09]

8. How is lead extracted from its ore. [June 08]

9. Explain the following i) dehydrating property of P2O5 ii) Oxidizing power of fluorine.

[Oct 08]

d Block Elements

3 Mark Questions

1. Explain why Mn 2+ is more stable than Mn 3+. [March 06]

2. A substance is found to have a magnetic moment of 3.9 BM. How many unpaired

electrons does it contain? [ March 06]

3. Why do transition elements form complexes? [June 06, Oct 06, June 08, 09]

4. Give any two evidences for the oxidising nature of potassium dichromate. [ June 06]

5. Why do d-block elements have variable oxidation states? [Oct 06, March 07, June 07,

March 09]

6. How is chrome-plating done? [Oct 06, March 08]

7. Write the action of aqua regia on gold. [March 07]

8. Explain electrolytic refining of copper. [June 07]

9. What is spitting of silver and how is it prevented? [Oct 07, 08]

10. What is the action of heat on copper sulphate crystals? Write the equation [March 08]

11. Write the reaction of CuSO4 with KCN. [June 08]

12. What is the action of NaOH on Zn? [Oct 08]

13. What is chromyl chloride test? Give the equation also. [March 09]

14. Why Zn2+ Salts white Ni2+ salts are coloured? [June 09]

15. Why do d-block elements formed coloured ions? [Oct 09]

16. What happens when KI solution is added to an aqueous solution of copper sulphate?

[Oct 09]

5 Mark Questions

1. How is zinc extracted from its chief ore? [March 06, June 09]

2. Explain the extraction of silver from its chief ore (Argentite). [June 06, Oct 07, June 08]

3. How is gold extracted from its ore? [Oct 06, June 07, March 08, Oct 09]

4. Explain how potassium dichromate is extracted from chromite ore. [March 07]

5. Explain aluminothermic process involved in the extraction of chromium. [Oct 08, March

09]

PROBLEMS

An element (A) belongs to group number 11 and period number 4. (A) is a reddish brown metal. (A) reacts with HCl in the presence of air and gives compound (B). (A) also reacts with conc. HNO3 to give compound (C) with the liberation of NO2. Identify (A), (B) and (C). Explain the reactions. [March 06]

The sulphide ore of an element of group 12 when roasted gave compound (A) which on reduction with carbon gave the element (B). The carbonate (C) of this element is used for skin diseases. Identify (A), (B) and (C) and write the required reactions. [Oct 06] Silver reacts with dil. HNO3 to give compound (A) which on heating at 723 K gives (B), (B) on further heating gives (C). Further compound (A) reacts with KBr and gives (D) which is highly useful in photography. Identity (A), (B), (C) and (D) Write the reactions. [June 06, March 09] An element (A) occupies group number 11 and period number 4. This metal is extracted from its mixed sulphide ore (B), (A) reacts with dil. H2SO4 in presence of air and forms (C) which is colourless. With water (C) gives a blue compound (D). Identify (A), (B), (C) and (D) and explain the reactions. [March 07] An element (A) belonging to group 6 and period 4 is silvery white in colour. Red hot, (A) decomposes steam liberating hydrogen and forming (B). (A) also reacts with conc. sulphuric acid forming (C) with evolution of SO2. Identify (A), (B) and (C). Explain the two reactions. [June 07] An element (A) belonging to Group No. 11 and Period No. 4 is extracted from the pyrite ore. (A) reacts with oxygen at two different temperatures forming compounds (B) and (C). (A) also reacts with conc. HNO3 to give (D) with the evolution of NO2. Find out (A), (B), (C) and (D). Explain the reactions. [Oct 07] The metal (B) is extracted from the ore (A). On treatment with dil. nitric acid metal (B) gives a compound (C) which is also known as Lunar Caustics. The compound (C) on treatment with KI gives a yellow precipitate (D). Find (A) (B) (C) and (D). Explain the reactions for the formation of (C) and (D). [March 08] A bluish white metal (A) present in 4th period and 12th group on heating in air gives a white cloud (B). Metal (A) on treatment with conc. H2SO4 gives the compound (C) and also (D). Find (A) (B) (C) and (D). Explain the reactions. [June 08] An element [A] belonging to Group 12 and Period 4 is bluish white in colour. (A) reacts. with hot conc. H2SO4 forming (B) with liberation of SO2. (A) also reacts with dil. HNO3 forming (C) with liberation of N2O. Identify (A), (B) and (C).Explain the reactions involved. [Oct 08] Compound A is a sulphate compound of group II element. This compound is also called as Blue Vitriol. The compound undergoes decomposition at various temperatures.

A bluish white metal when treated with dilute nitric acid gives (A) along with zinc nitrate and water. With very dilute nitric acid it gives (B) along with zinc nitrate and water. The metal when heated with air gives (C). What are (A), (B) and (C)? Explain the reactions. [Oct 09]

f Block Elements

5 Mark Questions

1. Compare the points of similarities and differences between lanthanides and actinides

(any five points). [March 06]

(OR)

2. Compare properties of lanthanides and actinides. [June 08]

3. Discuss the consequences of lanthanide contraction. [June 06, March 09]

(OR)

4. Bring out the consequences of lanthanide contraction. [March 07]

(OR)

5. What is lanthanide contraction? Discuss its causes and any two consequences. [Oct 07]

6. Describe the extraction of lanthanides from monazite sand. [Oct 06, June 07]

7. Discuss the position of lanthanides in the periodic table. [March 08]

8. Discuss the Oxidation state of lanthanides and write any three uses of lanthanides. [Sep

08]

9. Write the uses of lanthanides. [June 09, Oct 09]

(OR)

10. Write the uses of lanthanides and actinides.

COORDINATION COMPOUNDS AND BIO-COORDINATION COMPOUNDS

5 Mark Questions

1. Explain the postulates of Werners theory. [March 06, June 06, 07, Oct 07, June 08, Oct

09]

2. For the complex K4 [Fe(CN)6] and [Cu(NH3)4] SO4 mention

a) IUPAC name b) Central metal ion c) Geometry of the complex

a. d) Ligand e) Co-ordination number. [Oct 06, March 07, Oct 07, 09]

3. Mention the type of hybridization, magnetic property and geometry of the following

complexes using VB theory. [March 06, 09]

(i) [FeF6] 4- ii) [Fe (CN)6] 4-

4. Using VB theory explain why [Ni (CN)4] 2- is diamagnetic whereas [Ni (NH3)4] 2+ is

paramagnetic. [June 06, March 07, June 08]

5. Apply VB theory to find out the geometry of [Ni(NH3)4]2+ and calculate its magnetic

moment. [Oct 06]

6. Explain coordination & ionization isomerism with suitable examples. [June 07, March

08, Oct 08, June 09]

7. How is chlorophyll important in environment chemistry? Mention its functions.[March 08]

8. Explain the following terms i) neutral ligand ii) Chelates iii) Co-ordination

compounds. [Oct 08]

9. Give the postulates of valence bond theory? [March 09]

10. In the coordination complex [ Co (NH3)6] CI3 mention the following (a) IUPAC name (b)

Ligand (c) Central metal ion (d) Co-ordination number (e) nature of complex [June 09]

Nuclear Chemistry

3 Mark Questions

1. Explain the principle behind the Hydrogen bomb. [March 06]

2. What is the Q value of a nuclear reaction? [June 06]

3. Give any three differences between chemical reactions and nuclear reactions. [Oct 06]

4. The atomic mases of Li, He and proton are 7.01823 amu. 4.00387 amu and 1.00715

amu. respectively. Calculate the energy evolved in the reaction. [March 07]

5. Calculate the disintegration constant in seconds if half-life period is 100 seconds.

a. [June 07, 09]

6. In the following radioactive decay: [Oct 07]

7. Calculate the number of and particles emitted in the conversion of 90Th232 to 82pb208.

[March 08]

8. Half-life period of 79Au198 nucleus is 150 days. Calculate its average life. [June 08]

9. The decay constant for 6C14 is 2.31 10-4 year-1. Calculate the half-life period. [Oct 08]

10. How many and particles will be emitted by an element 84A218 in changing to a stable

isotope of 82B206? [March 09]

11. Calculate the Q value of the following nuclear reaction. [Oct 09]

5 Mark Questions

1. How are radioactive isotopes useful in medicine? [March 06, June 09]

2. Write a note on radio carbon dating. [June 06, Oct 06, 07, March 08]

3. Explain nuclear fission reaction with example. [June 08]

4. Explain the principle underlying the function of hydrogen bomb. [March 07]

5. Explain nuclear reaction takes place in Sun. [June 07]

6. Give the applications of radioactive isotopes in the study of (i) Mechanism of photo

synthesis in plants (ii) hydrolysis of ester [Oct 08]

7. Distinguish chemical reactions from nuclear reactions. [March 09, Oct 09]

Solid State II

3 Mark Questions

1. What are superconductors? Give any one of its applications. [March 06, June 06, Oct 08,

June 09]

2. What is vitreous state? [Oct 06, 07]

3. Determine the number of CsCl units per unit cell. CsCl has BCC arrangement.

a. [March 07]

4. What is meant by superconducting transition temperature? [June 07]

5. Write short note on molecular crystals. [March 08]

6. Write note on Frenkel defect. [June 08]

7. Sketch the following lattices. (a) Simple Cubic (b) Face Centred cubic (c)Body centred

cubic. [March 09]

8. How are Glasses are formed? [Oct 09]

5 Mark Questions

1. Explain Schottky and Frenkel defects. [March 06, Oct 08, March 09]

2. Explain Braggs spectrometer method. [June 06, Oct 06, 07, March 08, June 09, Oct 09]

3. Explain the nature of glass. [March 07]

4. Write the properties of ionic crystals. [June 07]

5. What are super conductors? Write their uses. [June 08]

Thermodynamics - II

3 Mark Questions

1. What is entropy? What is its unit? [March 06]

(OR)

2. Give entropy statement of second law of thermodynamics. Mention the unit of entropy also.

[Oct 08]

3. What is Gibbs free energy? [June 06]

4. What types of liquids or substances deviate from Troutons Rule? [Oct 06]

5. Give the Kelvin- Planck statement of second law of thermodynamics. [March 07]

6. State Clausius statement of second law of thermodynamics. [June 07]

7. What is the entropy change of an engine that operates at 100C when 453.6 kcal of heat is

supplied to it? [Oct 07, 09]

8. Calculate the molar heat of vaporization of the ideal liquid CCl4 (Boiling point of CCl4 is 76.7C)

[March 08]

9. H and S value of a reaction at 300 K are -10 k cal mole-1 and 20 cal deg -1 mole-1 res.

Calculate G Value. [June 08]

10. Calculate the entropy change involved in the conversion of 1 mole of ice at 0C and 1 atm to

liquid at 0C and 1 atm. the enthalpy of fusion per mole of ice is 6008 J mol-1. [March 09]

11. State Troutons rule. [June 09]

5 Mark Questions

1. Write the various statements of second law of thermodynamics. [March 06, June 06, Oct 06,

March 08, Oct 09].

2. Define free energy. Discuss its characteristics. [Mar 07, June 07, Oct 07, June 09].

3. Define entropy. Discuss any five characteristics of entropy. [June 08, Oct 08 , March 09].

Chemical Equilibrium

3 Mark Questions

1. The equilibrium constant Kc for A (g) B (g) is 2.5 10-2. The rate constant of the forward

reaction is 0.05 sec-1. Calculate the rate constant of the reverse reaction. [March 06]

2. In the equilibrium H2 + I2 2HI the number of moles of H2, I2 and HI are 1, 2, 3 moles

respectively. Total pressure of the reaction mixture is 60 atm. Calculate the partial pressures of H2,

I2 and HI in the mixture. [June 06]

3. Write the equilibrium constants Kc for the following reactions: [ Oct 06]

4. State Le Chattiers principle. [March 07]

5. What happens when ng = 0, ng = -ve, ng = +ve in a gaseous reaction? [June 07]

6. Define reaction quotient. [Oct 07]

7. What are the relations between formation and dissociation equilibrium constant? Give an

example. [March 08]

8. What is reaction quotient? How is it related to equilibrium constant. [June 08]

9. Dissociation of PCl5 decreases in presence of increase in Cl2 why? [March 09]

10. For the reaction A + B

3C at 25C, a 3 litre volume reaction vessel contains 1, 2 and 4

moles of A, B and C respectively at equilibrium, calculate the equilibrium constant Kc of the reaction

at 25C. [Oct 09]

11. Dissociation equilibrium constant of HI is 2.06 10-2 at 458C. At equilibrium, concentration of

HI and I2 are 0.36 M and 0. 15 M respectively. What is the equilibrium concentration of H2 at

458C? [June 09]

12. What is equilibrium constant? [Oct 09].

5 Mark Questions

1. Derive the relation Kp = Kc (RT)n (g) for a general Chemical equilibrium reaction. [March 06, June 07, Oct 08]. 2. Apply Le Chatelier principle to Habers process of manufacture of ammonia.

[June 06, March 08]

(OR)

3. Apply Le Chatelier principle to Habers process of manufacture of ammonia. 4. The dissociation equilibrium constant of HI is 2.06 10-2 at 458 K. At equilibrium the concentrations of HI and I2 are 0.36 M and 0.15 M respectively. What is the equilibrium concentration of H2 at 458 K? [Oct 06] 5. Derive the expression for Kc and Kp for the decomposition of PCl5. [March 07] 6. Apply Le Chateliers principle to contact process of manufacture of SO3. Contact Process

[Oct 07, June 08, March 09]

(OR)

7. Apply Le Chateliers principle to contact process of manufacture of SO3. Contact Process

[Oct 07, June 08 ]

8. Discuss the effect of temperature and pressure on the following equilibrium. [June 09]

N2 O4 (g) 2 NO2 (g) H = + 59. 0 kJ/mole 9. Derive the expression for Kc and Kp for the formation of HI. [Oct 09].

Chemical Kinetics

3 Mark Questions

1. Give any three examples for opposing reactions. [March 06, June 09]

2. The half-life period of a first order reaction is 20 mins. Calculate the rate constant. [March 06]

3. Write a note on consecutive reactions. [June 06, Oct 06, 09]

4. The initial rate of a first order reaction is 5.2 10 -6 mol lit -1 s-1 at 298 K, when the initial concentration of the reactant is 2.6 10 -3 mol lit -1. Calculate the first order rate constant of the reaction at the same temperature. [June 06]

5. Show that for a first order reaction time required for 99% completion is twice the time required

for 90% completion of the reaction. [Oct 06]

6. What are parallel reactions? Give an example. [March 07]

7. Write the Arrhenius equation and explain the terms. [March 07, 09]

8. Define order of a reaction? [June 07, 08, March 09]

9. What are opposing reaction? Give an example. [June 07]

10. What are simple and complex reactions? [Oct 07, 08]

11. Define Activation energy (or) What is meant by energy of Activation. [Oct 07, March 08, Oct 08]

12. What is a pseudo first order reaction? [March 08, June 09, Oct 09]

13. Derive the relation between half life and rate constant for first order reaction. [June 08]

5 Mark Questions

1. Give the characteristics of order of a reaction. [March 06, Oct 08]

2. Explain the experimental determination of rate constant for the decomposition of hydrogen

peroxide in aqueous solutions. [June 06, Oct 07]

3. Discuss the characteristics of a first order reaction. [Oct 06]

4. Explain the experimental determination of rate constant of acid hydrolysis of methyl acetate.

[March 07]

5. State the differences between simple and complex reactions. [June 07]

6. Write notes on i) consecutive reactions ii) parallel reactions iii) opposing reactions. [March 08]

(OR)

7. Explain various type of complex reactions and give one example for each. [June 08]

8. Derive the expression for the rate constant of a first order reaction? [June 09]

9. Compound A reacts by first order kinetics. At 25C, the rate constant of the reaction is 0.45 sec. What is the half-life period of A at 25C? What is the time required to have 12.5% unreacted A for first order reaction? [March 09]

10. A first order reaction is 75% complete in 100 minutes. What are the rate constant and half-life

period of the reaction? [Oct 09]

Surface Chemistry

3 Mark Questions

1. What is electrophoresis? [March 06]

2. What are emulsions? [June 06]

3. Write a note on auto-catalyst. [Oct 06]

4. Why is a colloidal system of gas in gas does not exist? [March 07]

5. What is catalytic poison? Give an example. [June 07]

6. What is tanning? [Oct 07]

7. What are heterogeneous catalysis? Give an example. [March 08]

8. Write a note on promoters? Give an example. [June 08]

9. What is electro dialysis? [Oct 08]

10. What is peptisation? [March 09]

11. What is Brownian movement? Give reason. [June 09]

12. Give any three differences between physical adsorption and chemical adsorption. [Oct 09]

5 Mark Questions

1. Write briefly about the adsorption theory of catalysis. [March 06, 09]

2. Write any three methods for the preparation of colloids by dispersion methods.

[June 06, March 08]

3. Write any two chemical methods for the preparation of colloids. [Oct 06, June 07]

4. Write briefly on intermediate compound formation theory of catalyst with an example. [March 07,

Oct 08]

5. What is electro-osmosis? Explain. [Oct 07, June 08]

6. Distinguish between physical adsorption and chemical adsorption. [June 09]

7. Write notes on a (i) Auto catalyst, (ii) Promoters. [Oct 09]

Electrochemistry I

3 Mark Questions

1. State Faradays first and second laws of electrolysis. [March 06]

2. State Kohlrauschs law. [June 06, Oct 08, 09]

3. What is meant by common ion effect? [Oct 06, June 07, Oct 07, March 08]

4. The mass of the substance deposited by the passage of 10 ampere of current for 2 hours 40

minutes and 50 seconds is 9.65 g. calculate the electrochemical equivalent. [March 07]

5. State Ostwald dilution law [March 09]

6. Define equivalent conductance. Give an example. [June 08]

7. Define electro chemical equivalent. What is its unit? [June 09]

5 Mark Questions

1. Derive and explain Ostwalds dilution law. [March 06, 07, Oct 08]

2. Explain Ostwalds theory of indicators. [June 06]

3. Derive Henderson equation. [Oct 06, June 07, March 08]

4. Explain Quinonoid theory of indicators. [Oct 07, June 08, March 09]

5. Write the Postulates of Arrhenius theory of electrolytic dissociation. [June 09]

6. Explain the buffer action of acidic buffer with an example. [Oct 09]

Problem Questions

What is the pH of a solution containing 0.5 M propionic acid and 0.5 M sodium propionate? The Ka of propionic acid is 1.34 10 -5. [March 06] Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.15 mole per litre acetic acid. Ka for acetic acid is 1.8 10-5. [June 06, Oct 06, 07] Calculate the pH of the buffer solution containing 0.04 M NH4 Cl and 0.02 M NH4 OH. For NH4 OH Kb is 1.8 10-5. [March 07]

Equivalent conductivity of acetic acid at infinite dilution is 390.7 for 0.1 M acetic acid. The equivalent conductance is 5.2 mho cm2 gm equiv-1. Calculate the degree of dissociation and hydrogen ion (H+) concentration. [June 07] An electric current is passed through three cells in series containing respectively the solutions of copper sulphate, silver nitrate and potassium iodide. What weights of silver and iodine will be liberated while 1.25 gm of copper is being deposited? [March 08] The equivalent conductance of HCl, CH3 COONa and NaCl at infinite dilution are 426.16, 91.0 and 126.45 ohm-1 cm2 (gram equivalent)-1 respectively. Calculate the equivalent conductance of acetic acid. [June 08] Find the pH of a buffer solution containing 0.30 mole per litre of CH3 COONa and 0.15 mole per litre of CH3 COOH. Ka for acetic acid is 1.8 10-5. [Oct 08] 0.1978 g of copper is deposited by a current of 0.2 ampere in 50 minutes. What is the electrochemical equivalent of copper? [March 09] Calculate the pH of 0.1 M acetic acid solution. Dissociation constant of acetic acid is 1.8 10-5. [June 09] 0.04 N solution of a weak acid has a specific conductance of 4 10-4 mho. cm-1. The degree of dissociation of the acid at this dilution is 0.05. calculate the equivalent conductance of the weak acid at infinite dilution. [Oct 09]

Electrochemistry II

5 Mark Questions

1. Write the IUPAC convention of representation of a cell. [March 06, 07, 09]

2. Derive Nernst equation. [June 06, Oct 06, June 08, Oct 08, March 09]

3. Show that the electrical energy supplied by a cell is equal to the free energy.

(OR)

4. Write a brief account on the relation between EMF and free energy. [Oct 06, 07, June 09]

5. How is e.m.f. of half cell determined? [March 08]

6. Describe Daniel cell. [June 07, Oct 09]

7. Write an account on cell terminology. [June 09]

8. How is standard hydrogen electrode constructed? Explain its function. [Oct 09]

5 Mark Questions

1. Calculate the e.m.f of zinc-silver cell at 25C when [Zn 2+] = 0.10 M and [Ag +] = 10 M. ( cellE

at 25 C = 1.56 volts). [March 06, June 06, 07, 08 Oct 08]

2. The e.m.f. of the half cell Cu2+ (aq)/ Cu(S) containing 0.01 MCu2+ solution is + 0. 30 1 V.

Calculate the std. emf of the half cell. [March 07]

3. Determine the standard e.m.f. of the cell and standard free energy change of the cell

reaction, Zn, Zn2+ || Ni2+, Ni. The standard reduction potentials (E) of Zn2+, Zn and Ni2+, Ni

half cells are -0.76 V and -0.25 V respectively. [Oct 07, March 08]

Isomerism in organic Chemistry

3 Mark Questions

1. Mesotartaric acid is an optically inactive compound with asymmetric carbon atoms.

Justify your answer. [March 06, Oct 06]

2. Differentiate diastereomer from enantiomer. [June 06]

3. Distinguish between racemic and meso forms. [March 07]

4. Label the following as E, Z isomers: [June 07, Oct 08]

5. What are the conditions for a compound to be optically active? [Oct 07, March 09]

6. What is racemic mixture? Explain with example? [March 08, June 09, Oct 09]

7. What are optical isomers? Give an example. [June 08]

5 Mark Questions

1. Distinguish enantiomers from diastereomers. Give an example each. [March 06, 08]

2. Distinguish racemic form from Meso form with suitable example. [Oct 06]

3. Discuss the optical isomerism in tartaric acid. [June 06, 08, Oct 08 March 09]

4. Describe the conformation of cyclohexanol. Comment on their stability. [March 07]

5. Illustrate geometrical isomerism with an example. [Oct 07, June 09]

(OR)

6. Write a note on Cis-Trans Isomerism. [Oct 09]

7. Explain internal and external compensation with suitable examples. [June 07]

Hydroxy Derivatives

3 Mark Questions

1. How can the consumption of alcohol by a person be detected? [March 06]

2. How will you convert phenol to phenolphthalein?

(OR)

3. How is phenolphthalein prepared? [March 06, June 06, 09]

4. Why is glycol more viscous than ethanol? [June 06]

5. Given a brief account on coupling reaction of phenol with benzene diazonium chloride.

[Oct 06]

(OR)

6. Write the dye test for phenol. [Oct 07, March 09]

7. Give any three uses of benzyl alcohol. [Oct 06]

8. What happens when glycerol reacts with KHSO4? [March 07]

9. Phenol is insoluble in NaHCO3 solution but acetic acid is soluble. Give reason. [March

07]

10. Explain Dows process? [June 07]

11. How will you convert C2H5OH to C2H5OC2H5? [June 07]

12. How is allyl alcohol obtained from glycerol? [Oct 07]

13. How is ethylene glycol converted into di oxan? [March 08, Oct 08]

14. Alcohols cannot be used as a solvent for Grignard reagents. Why? [March 08]

15. How is glycerol synthesized from propylene? [June 08]

16. Write a note on Kolbes reaction [June 08]

17. How is terylene prepared from glycol? [March 09]

18. How will you covert 2 methyl 2 propanol into 2 methyl propene, [June 09]

19. What happens when ethylene reacts with cold dilute alkaline KMnO4?

Problem Questions

An organic compound (A) of molecular formula C3 H8 O gives turbidity within 5 10 min or reaction with anhydrous ZnCl2 / HCl. Compound (A) on treatment with sodium hypochlorite gives a carbonyl compound (B) which on further chlorination gives compound (C) of molecular formula C3H3OCl3. Identify (A), (B) and (C). Explain the reactions. [March 06] An organic compound (A) C2 H6 O liberates hydrogen on treatment with metallic sodium. (A) on mild oxidation gives (B) C2 H4 O which answers iodoform test. (B) when treated with conc. H2SO4. Undergoes polymerisation to give (C), a cyclic compound. Identify (A), (B) and (C) and explain the reactions. [June 06] An organic compound (A) or molecular formula C2H6O. on treatment with PCl5 gives compound (B). Compound (B) reacts with KCN to give a compound (C) of molecular formula C3H5 N which undergoes acid hydrolysis to give compound (D) which on treatment with Sodalime gives a hydrocarbon. Identify (A), (B), (C) and (D) and explain the reactions. [June 06]

An organic compound (A) of molecular formula C6H6O gives violet colouration with neutral FeCl3. Compound A on treatment with metallic Na gives compound (B). Compound (B) on treatment with CO2 at 400 K under pressure gives (C) C7H6O3. This product on acidification gives compound (D) which is used in medicine. Identify (A) (B) (C) and (D) and explain the reactions. [Oct 06] An organic compound A of molecular formula C3H6O on reduction with LiAlH4 gives B. Compound B gives blue colour in Victor Meyers test and also forms a chloride C with SOCl2. The chloride on treatment with alcoholic KOH gives D. Identify A, B, C and D and explain the reactions. [March 07] An organic compound A (C6H6O)gives maximum of two isomers B and C when an alkaline solution of A is refluxed with chloroform at 333 K. B on oxidation gives an acid D. The acid D is also obtained by treating sodium salt of A with CO2 under pressure. Identify A, B, C and D and explain the reactions. [March 07] An organic compound (A) C3H8O answer Lucas test-within 5-10 minutes and on oxidation forms B(C3H6O). This on further oxidation forms C(C2H4O2) which gives effervescence with Na2 CO3 B also undergoes iodoform reaction. Identify A, B and C. Explain the conversion of A to B and C. [June 07, 09] An organic compound (A) gives maximum of two isomers (B) and (C) when an alkaline solution of (A) is refluxed with CCl4. (A) also reacts with C6H5N2Cl to give the compound (D) which is a red orange dye. Identity (A), (B), (C) and (D). Explain with suitable chemical reactions. [Oct 07] Compound A with molecular formula C3H6 is obtained from petroleum. When A is treated with chlorine at 773 K compound B of molecular formula C3H5Cl is obtained. When B is treated with Na2 CO3 solution at 773 K/12 atm. it gives the compound C with molecular formula C3H6O. C on treatment with HOCl followed by hydrolysis with NaOH gives D having molecular formula C3H8O3. Find A, B, C and D. Explain the reaction [March 08] Two isomers (A) and (B) have the same molecular formula C4 H10 O. (A) when heated with copper at 573 K gives an alkene (C) of molecular formula C4 H8. (B) on heating with copper at 573 K gives (D) of molecular formula C4 H8 O which does not reduce Tollens reagent but answers iodoform test. Identify (A), (B), (C) and (D) and explain the reactions. [March 09] An organic compound (A) of molecular formula C2H6O liberates hydrogen with metallic sodium. Compound (A) on heating with excess of conc. H2SO4 at 440 K gives an alkene (B). Compound (B) when oxidised by Baeyers reagent gives compound (C). Identify A, B, C and explain the above reactions.

Compound (A) of molecular formula C3H8O liberates hydrogen with sodium metal. (A) with P/I2 gives (B). Compound (B) on treatment with silver nitrite gives (C) which gives blue colour with nitrous acid. Identify (A), (B), (C) and explain the reactions. [Oct 09]

Ethers

3 Mark Questions

1. How do ethers react with HI? Give the significance of the reaction. [March 06]

2. Discuss the isomerism in ethers. [June 06, Oct 07]

3. Distinguish between anisole and diethyl ether. [Oct 06, 08, 09 June 09]

4. How does diethyl ether react with the following reagents. [March 07]

5. Give any three methods of preparing diethyl ether. [June 07, March 08]

6. Give any two methods of preparation of anisole and explain the reaction of HI with

anisole. [June 08, March 09]

Carbonyl Compounds

3 Mark Questions

1. Give the IUPAC names for the following: i) Crotonaldehyde ii) Methyl n-propyl ketone

iii)Phenyl acetaldehyde. [March 06]

2. How is urotropine prepared? Mention its use.

(OR)

3. How does formaldehyde react with ammonia? [Oct 06, June 06, Mar 08, June 09]

4. What is formalin? Write its use. [June 07]

5. How is acetophenone prepared by Friedel- crafts method? [March 07, 09]

6. What is Rosenmunds reduction? What is the purpose of adding BaSO4 in it? [Oct 07]

7. Explain haloform reaction with an example. [Oct 08]

8. Write two tests to Identify aldehydes. [June 08]

5 Mark Questions

1. Explain the mechanism of Cannizzaro reaction. [March 06, June 08, 09]

2. Write the mechanism of crossed aldol condensation of acetone. [June 06]

3. Explain the mechanism of aldol condensation of acetaldehyde. [ Oct 06, March 07,

June 07, Oct 08]

4. Give the mechanism for Claisen or Claisen-Schmidt reaction. [Oct 07]

5. Write the Comparison of aldehydes and ketones. [March 08]

6. Explain Popotts rule with an example. [March 09]

7. Write notes on (i) Stephens reaction. (ii) Perkins reaction.

Problem Questions

An organic compound (A) of molecular formula C7 H6 O is not reduced by Fehlings solution but will undergo Cannizzaro reaction. Compound (A) reacts with Aniline to give compound (B). Compound (A) also reacts with Cl2 in the presence of catalyst to give compound (C). Identify (A), (B), and (C) and explain the reactions. [March 06] An organic compound (A) C7H6O reduces Tollens reagent. On treating with an alkali compound (A) forms (B) and (C). (B) on treating with sodalime forms benzene and (C) C7H8O is an antiseptic. Identify compounds (A), (B) and (C). Explain the reactions. [Oct 06] An aromatic aldehyde (A) of molecular formula C7H6O which has the smell of bitter almonds on treatment with (CH3CO)2 O and CH3COONa to give compound (B) which is an aromatic unsaturated acid. (A) also reacts with (A) in the presence of alc. KCN to give dimer (C). Identity (A), (B) and (C). Explain the reactions. [Oct 07] Compound A with molecular formula C7H6O reduces Tollens reagent and also gives Cannizzaro reaction. (A) on oxidation gives the compound (B) with molecular formula C7H6O2. Calcium salt of (B) on dry distillation gives compound (C) with molecular formula C13H10O. Find (A), (B) and (C). Explain the reactions. [March 08]

Compound (A) of molecular formula C7H8 is treated, with chlorine and then with NaOH to get compound (B) of molecular formula C7H8O. (B) on oxidation by acidified K2Cr2O7 gives compound (C) of molecular formula C7H6O. Compound (C) on treatment with 50% caustic soda gives the compound (B) and also (D). Find (A), (B), (C) and (D). Explain the reactions. [June 08] Compound (A) having the molecular formula C2H4O reduces tollens reagent. (A) on treatment with HCN followed by hydrolysis gives the compound (B) with molecular formula C3H6O3. Compound (B)on oxidation by Fentons reagent gives the compound (C) with the molecular formula C3H4O3. Find (A) (B) and (C). Explain the reactions. [June 08, Oct 08] An organic compound (A) C7H8O liberates hydrogen with metal sodium. (A) on treatment with acidic potassium dichromate gives (B) (C7H6O).Compound (B) when treated with conc. NaOH/KOH gives (A). (B) with acetic anhydride in the presence of sodium acetate gives (C) of molecular formula (C9H8O2). Identify (A), (B), and (C). Explain the reactions involved. [Oct 08] An aromatic compound (A) with molecular formula C7H6O has the smell of bitter almonds. (A) reacts with Cl2 in the absence of catalyst to give (B) and in the presence of catalyst compound (A) reacts with chlorine to give (C). Identify (A), (B) and (C). Explain the reactions. [March 09] An organic compound (A) C7H6O forms a bisulphite. A when treated with alcoholic KCN forms (B) C14H12O2 and A on refluxing with sodium acetate and acetic anhydride forms an acid (C) C9H8O2. Identify (A) (B) and (C). Explain the conversion of (A) to (B) and (C). [June 07] An organic compound (A) C2H3OCI on treatment with Pd and BaSO4 gives (B) C2H4O which answers iodoform test. (B) when treated with conc. H2SO4 undergoes polymerisation to give (C) a cyclic compound. Identify (A), (B) and (C) and explain the reaction. [Oct 09]

Carboxylic Acids

3 Mark Questions

1. What is trans-esterification? [March 06]

2. What is meant by esterification reaction? Write the equation. [June 06]

3. Write a note on HVZ reaction. [Oct 06]

4. Mention the uses of oxalic acid. [March 07, 09]

5. Give the source and trivial name of [June 07]

6. Formic acid reduces Tollens reagent but acetic acid does not. Give reasons.

[Oct 07, 08, 09]

7. What is the reaction of lactic acid with dil H2SO4 [March 08]

8. How methyl salicylate prepared? [June 08]

9. Write two tests to identify carboxylic acids. [June 09]

5 Mark Questions

1. How is lactic acid manufactured in large scale? How can it be converted into cyclic

diester? [March 06]

2. Explain the reducing property of formic acid. [June 08, Oct 08, June 09]

3. Give the mechanism of esterification of Carboxylic acid with alcohol. [March 06, June 06,

March 08, Oct 09]

4. How can salicylic acid be converted to i) Aspirin ii) 2, 4, 6 tribromophenol iii) Methyl

salicylate? [June 06]

5. How is benzoic acid obtained from [Oct 06, 09]

6. Discuss the isomerism exhibited by carboxylic acid. [Oct 06]

7. Distinguish between formic acid and acetic acid. [March 07, June 08]

8. What happens when lactic acid is treated with dil. i)H2SO4 ii)PCl5 iii) acidified KMnO4

[March 07, June 09]

9. How are the following conversions carried out? [June 07]

10. How is oxalic acid manufactured from sodium formate? [Oct 07]

11. Write the mechanism of bromination of salicylic acid. [Oct 07, 08]

12. How the following conversions are takes place. [ March 08]

13. What happens i) Oxalic acid is treated with NH3 ii) Benzoic acid is treated with PCl5.

[June 08]

14. How are the following conversions carried out? [March 06, 09]

15. Explain the Mechanism of Kolbes reaction. [March 09]

Organic Nitrogen Compounds

3 Mark Questions

1. How will you convert acetamide to methyl amine? Give equation. [March 06]

2. An organic compound (A) having molecular formula C2H7 N is treated with nitrous acid

to give (B) of molecular formula C2H6O which answers iodoform test. Identify (A) and (B) and

explain the reaction. [June 06]

3. What is Gabriel phthalimide synthesis? [Oct 06, March 07, Oct 07, 08]

4. Explain diazotisation with a suitable example. [June 07, 09]

5. When benzamide is treated with bromine and alkali gives compound A. Also when

benzamide is reduced by LiAl/H4. Compound B is formed. Find A and B. Write the equations.

[March 08]

6. C6H5 CH2 NH2 2HNO A ( )O B /Zn HgHCIC. Identify A, B and C. [June 08]

7. An aromatic primary amine A with molecular formula C6H7N undergoes diazotization to

give B. B when treated with hypo phosphorous acid gives C. Identify A, B and C.[March 09].

8. An aromatic simplest nitro compound A on reduction using Sn HCI gives B. B undergoes

carbylamine reaction. Identify A and B. Give any one use of compound A. [Oct 09]

5 Mark Questions

1. Distinguish between primary, secondary and tertiary amines. [March 06, June 06, Oct

07, June 09, Oct 09]

2. How are the following conversions carried out? [Oct 06]

3. Write a note on the reduction of nitrobenzene under different conditions. [March 07]

4. How are the following conversions carried out? [June 07]

5. How are (i) phenol (ii) chlorobenzene, (iii) biphenyl prepared by using benzene

diazonium chloride? [March 08]

6. How does nitrous acid react with primary, secondary and tertiary amine? [June 08]

7. Explain the following reactions in aniline: [Oct 08]

8. Coupling reaction ii)Schotten-Baumann reaction iii)Carbylamine reaction

9. Explain Gabriels phthalimide synthesis and mustard oil reaction. [March 09]

Bio Molecules

5 Mark Questions

1. Discuss the structure of fructose in detail. [March 06, 07, Oct 07, 08, June 09, Oct 09]

2. Prove the structure of glucose. [June 06, March 09]

3. What is a peptide bond? Illustrate the formation of a peptide bond in glycyl alanine.

Draw the structures of glucose and fructose. [Oct 06]

4. Outline the classification of carbohydrates giving an example for each. [June 07, March

08, June 08]

Chemistry in Action

3 Mark Questions

1. How is Dacron prepared? Give any one of its uses. [March 06]

2. Write a brief note on Buna-S. [June 06]

3. Write a brief note on Antiseptic. [Oct 06]

(OR)

4. Why are iodo form and phenolic solutions called antiseptics? [March 08]

5. What are chromophores? Give two examples. [March 07, June 09]

6. What are anaesthetics? Give one example. [June 07, 08]

7. In what way are antacids important? [Oct 07]

8. How is nylon-66 prepared? Give its use. [March 09]

9. What are artificial sweetening agents? Give two examples. [Oct 09]

5 Mark Questions

1. Explain briefly the characteristics of rocket propellants. [March 06, June 06, 07, Oct 07,

June 08, March 09]

2. Illustrate with suitable examples the term Anaesthetics. [Oct 06]

3. Write briefly on Buna rubbers. [March 07, 08, Oct 08]

4. Explain briefly on colour and structure of dyes. [Oct 08, 09]

5. What are the characteristics of Dyes? [June 09].