(CHAPTERWISE PREVIOUS YEARS QUESTIONS)

Transcription

1 SECOND YEAR CHEMISTRY IPE (CHAPTERWISE PREVIOUS YEARS QUESTIONS) 1. SOLID STATE ` KUKATPALLY CENTRE 1. What makes a glass different from quartz?. Stability of a crystal is reflected in the magnitude of its melting point. Comment. 3. What is Semi Conductor? 4. Why X - rays are needed to probe the crystal structure? 5. What are f - centers? 1. Explain similarities and differences between matalic and ionic crystals.. Explain why ionic solids are hard and brittle? 3. Derive Bragg's Equation.. SOLUTIONS 1. Define the term solution.. Define mass percentage solution. 3. What is cryoscopic constant? 4. Calculate the amount of benzoic acid ( C6H5COOH ) required for preparing 50ml of 0.15 M solution is methanol. 5. What is relative vapour pressure? 1. A solution of sucrose in water is labelled as 0% (w/w). What would be the mole fraction of each component in the solution?. Vapour pressure of water at 93 K is mm of Hg. Calculate the vapour pressure of the solution at 93 K when 5 g. of glucose is dissolved in 450 g. of water?. 3. What is relative lowering of vapour pressure? How is it useful to determine the molar mass of a solute? 4. Calculate the molarity of a solution containing 5g of NaOH in 450 ml solution. 5. Calculate the molality of.5 of ethanoic acid ( CH3COOH ) in 75g of benzene 6. Determine the Osmotic Pressure of a solution prepared by dissolving 5 mg of KSO 4 in It of water at 5 C assuming that it is completely dissociated. 3. ELECTRO CHEMISTRY & CHEMICAL KINETICS 1. What is a galvanic cell or a voltaic cell? Give one example. 0 RT Mg Write the cell reaction for which Ecell Ecell In E Ag 3. Define conductivity of a material. Give its SI units. 4. Define Molar conductivity m and how is it related to conductivity (k)? 5. What is primary battery? Give one example. 6. What is Metallic corossion? Give one example. 7. What is rate law? Illustrate with an example. 8. Define effect of temperature on the rate constant.

2 1. What are galvanic cells? Explain the working of a galvanic cell with a neat sketch taking Daniell cell as example.. State and explain Nernst equation with the help of a metalic electrode and non-metalic electrode. 3. Explain with a suitable example the relation between the Gibbs energy of chemical reaction (G) and the functioning of the electrochemical cell. 4. Give the applications of KohIrausch's law of independent migration of ions. 5. Define and explain the order of a reaction, How it is obtained experimentally? 6. Describe the salient features of the collision theory of a reaction rates of biomolecular reactions The half-life for a first order reaction is 5 10 S. What percentage of the initial reactant will react in hours? 8. The rate constant of a reaction is doubled when the temperature is raised from 98 K to 308 K Calculate the activation energy VERY SHORT ANSWERQUESTIONS 4. SURFACE CHEMISTRY 1. What is an interface? Give one example.. What is desorption? 3. What is the difference between physisorption and chemisorption? 4. What is Tyndall effect? 5. What is peptization? 6. Under what conditions is tyndall effect observed? 7. State Hardy - Schulze rule. 8. What is protective colloid? 1. Write the different types of adsorption? Give any four differences between characteristics of these different types.. What is catalysis? How is catalysis classified? Give two examples for each type of catalysis. 3. Discuss the factors that influence the catalytic activity of enzyrmes. 4. What are lyophilic and lyophobic sols? Compare the two terms of stability and reversibility. 5. Describe Bredig's are method of preparation of colloid s with a neat diagram. 6. What are emulsions? How they are classified? Describe the application of emulsion. 5. GENERAL PRINCIPLES OF METALLURGY 1. Explain poling:. What is the role of depressant in froth floatation? 3. What is the difference between a mineral an d an ore? 4. What is matte? Give its composition. 5. Explain the terms gangue and slag. 6. What is flux? Give an example.. 1. Explain zone refining,. Give examples to differentiate roasting and calcination. 3. Explain the purification of sulphide ore by froth flotation method. 4. Explain the process of leading of alumina from bauxite 5. Explain the extraction of zinc from zinc blende. 6. p BLOCK ELEMENTS GROUP - 15 ELEMENTS 1. Nitrogen exists as diatomic molecule and phosphorus as P4-why?. Nitrogen molecule is highly stable - why? 3. What is allotropy? Explain the different allotropic forms of phosphorus. 4. What is inert pair effect? 5. Give the uses of ammonia and nitric acid. 6. Give the disproportionation reaction of H3PO 3.

3 1. How is ammonia manufactured by Haber's process? Explain the reactions of ammonia with a) ZnSO 4 b) ( aq) CuSO 4 c) ( aq) AgCl ( s). How is nitric acid manufactured by Ostwald's process? How does it react with the following? a) Copper b) Zn c) S 8 d) P 4 GROUP - 16 ELEMENTS 1. What happens when: a) KClO 3 is heated with MnO. b) O 3 is passed through KI solution:. Oxygen molecule has the formula O while sulphur has Why is HO is a liquid while HS is a gas? 4. SO can be used as an anti-chlor. Explain. 5. How does ozone react with Ethylene? 1. How is ozone prepared? How does it react with the' following?. Explain in detail the manufacture of sulphuric acid by contact process. GROUP - 17 ELEMENTS 1. What is the use of ClF 3?. Why are halogens coloured? 3. Write the reactions of F and Cl with water. 4. Explain the -reactions of Cl with NaOH. 5. What is aqua regia? Write the reaction with gold and platinum. 1. How can you prepare Cl from HCl and HCl from Cl? Write the reactions.. How is ClF 3 prepared? How does it react with water? Explain its structure. 3. How is chlorine prepared in' the laboratory? How does it react with the following?. a) Iron b) hot. Conc NaOH c) acidifed FeSO 4 d) Iodine e) HS f) NaSO 3 GROUP - 18 ELEMENTS 1. Nobel gases are inert - Explain.. Explain the shape of XeF 4 on the basis of VSEPR theory. 3. How is XeOF 4 prepared? Describe its molecul ar simp 4. How is Xe 03 prepared? 1. Explain the reaction of the following with water. a) XeF b) XeF 4 c) XeF 6. Explain the structures : a) XeF b) XeF 4 c) XeF 6

4 3. Complete the following: XeF a) b) 5 H O XeF PF XeF SbF c) 4 5 XeF ASF d) d AND f BLOCK ELEMENTS AND COORDINATION COMPOUNDS 1. What are transition elements? Give examples.. Why are Mn compounds more stable than Fe towards oxidation to their +3 state? 3. Transition elements have high melting points. Why? 4. Calculate the "spin only" magnetic moment of Fe ion. 5. How do transition metals exhibit catalytic acitivity? 6. What is an alloy? Give example. 7. What are co-ordination compounds? Give two examples. 8. What are chelate, ambidenate Ligands? Give example. 9. Using IUPAC norms write the formulas for the following. a) Tetrahydroxozincate (II) b) Hexaammine cobalt (III) sulphate c) Potassium tetrachloropalladate (II) d) Potassium tri (oxalato) chromate (III). 10. Using IUPAC norms write the systematic names of the following. a) 3 6 b) [ Pt( NH3) Cl(NH CH3)] Cl. 3 6 c) Ti H O [ ] 4 d) [ NiCl ] 1. What is lanthanoid contraction? What are the consequences of lanthanoid contraction?. Describe the preparation of potassium dichromate from iron chromite ore. 3. Explain Werner's theory of co-ordination compounds with suitable examples. 4. What are homoleptic and heteroleptic complexes? Give one example for each. ( aq) 8. POLYMERS 1. What are polymers? Give Example.. What is polymerization? Give an example of polymerization reaction. 3. Give one example each for synthetic and semi-synthetic polymers. 4. Define the terms. a) addition polymer b) condensation polymer c) homo polymer d) copolymer. 5. What is Ziegler - Natta catalyst? 6. What are fibers? Give example. 7. What are elastomers? Give example. 8. What is the difference between Buna - N and Buna - S? 9. What is vulcanization of rubber? 10. What is PHBV? How is it useful to man? 11. Give the structure of nylon - Nylon 6? 1. Write the names and structures of the monomers used for getting the following polymers. i) Polyvinyl chloride ii) Teflon iii) Bakelite iv) Polystyrene. '. What are LDP and HDP? How they are formed? 3. Explain the properties to vulcanization of rubber.

5 9. BIOMOLECULES 1. What are anomers?. What do you understand by invert sugars? 3. What is zwitter ion? Give an example. 4. Write the names of three types of RNA. 5. What are essential and non-essential amino acids? Give one example for each. 6. What are nucleic acids? Mention their three important functions. 1. Write a brief note on the structure of glucose.. Write short note on sucrose. 3. Explain the denaturation of proteins. 4. Write notes on vitamins. 1. Write notes on a) fructose b) sucrose c) maltose d) lactose 1. What is allosteric site?. What arc antagonists and agonists? 3. What are antihistamines? Give examples. 4. What arc analgesics? How are they classified? 5. What are antimicrobials? 6. What are aclis pries? 7. What is tinctur of iodin? What is its us? 8. What are artificial sweetening agents? Give example. 9. What are food preservatives? Give examples. 10. What are systhentic detergents? 10. CHEMISTRY IN EVERY DAY LlFE 1. Name the different categories of synthetic detergents.. Explain the drug - enzyme interaction, 3. What are analgesis? How are they classified? Give examples. 4. What are biodegradable and non-biodegradable detergents? 1. Write an essay on antimicrobials.. Write on the food preservatives. 11. HALOALKANES AND HALOARENES 1. What are ambident nucleophiles?. Which compound in each of the following paim will react faster in SN reaction with - OH? 3. What are enantiomers? 1. How will you carry out ethane to bromomethene conversions?. Predict the alkenes that would be formed in the CH3Br and CH3I Reaction and identify the major alkene.

6 1. Discuss the physical properties of haloalkanes.. Describe the stereo chemical effect on the hydrolysis of bromobutane. 3. Explain the Grignard reagents preparation and application with suitable example. 1. ORGANIC COMPOUNDS CONTAINING C, H AND O 1. Write the equations for the preparation of phenolusing benzene, Conc. HSO 4 and NaOH.. Illustrate hydroboration - oxidation reaction with a suitable examples. 3. With a suitable example write equation for the following. i) Kolber reactions. Ii) Reimer - Tiemann reaction. iii) Williamson ether synthesis. 1. Explain the acidic nature of phenols and compare with of alcohols.. Ethanol with HSO 4 at 443K form s ethene while at 413K it forms ethexy ethane. Explain the mechanism. 3. Account for the statement : Alcohols boil at higher temperature than hydrocarbons and ethers of comparable molecular masses. 13. ORGANIC COMPOUNDS CONTAINING NITROGEN 1. Explain why ethylamine is more soluble in water. Whereas aniline is not soluble.. Gabriel phthalimide synthesis exclusively forms primary amines only. Explain. 3. Accomplish the Benzoic acid to benzamide conversions. 4. Why cannot aromatic primary amines be prepared by Gabriel phathallimide systhesis? SHORT ANSWERQUESTIONS 1. How do you prepare the following? i) N, N - Dimethyl proponamine from ammonia. ii) Propanamine from chloro ethane.. Explain with a suitable example how benzene sulphonyl chloride can distinguish primary, secondary and tertiary amines. 3. How do you prepare ethyl cyanide and ethyl isocyanide from a common alkythalides.