7/17/2015 GREEN VALLEY MHSS- CHENNAI IMPORTANT QUESTIONS FOR CHEMISTRY-2015 BY A.MOORTHY.MSC,BED..CELL:8754706647 MOORTHY.M.SC,B.Ed Cell:8754706647
GREEN VALLEY MATRIC Hr. Sec. SCHOOL - CHENNAI Expected Question - 2015 Std - XII - Chemistry 3 Marks Question 31 Atomic structure 1. Why He 2 is not formed? 2. What is bond order? 3. State Heisenberg uncertainty principle? 4. What is the significance of Negative electronic energy? 5. Define hybridization? 6. What is the condition for effective hydrogen bonding? 32 Periodic classification 1. Compare boron and Beryllium 2. Compare Fluorine and chlorine 3. Compare carbon and boron 4. Compare Aluminium and magnesium 5. Compare Beryllium and Lithium 6. Compare Beryllium and nitrogen 7. Compare Neon and fluorine 8. Compare oxygen and fluorine 9. Define electron affinity 10. Mention the disadvantage of Pauling and Mulliken scale. 11. Calculate the effective nuclear charge expressed by 4s electron in potassium atom. 33, 34 p block element www.padasalai.net 1. Prove that p 2 O 5 is powerful dehydrating agent? 2. Why HF is not stored in silica or Glass bottles, write the equation? 3. What is plumbo solvency? 4. Nusterate the oxidizing power of fluorine? 5. Write about the Holme s signal? 6. Write the uses of He 2? 7. Write the uses of Ne? 8. How is potash Alum is prepared? 9. Draw the electronic structure of H 3 PO 3 and Pcl 5 10. How is phosphoric acid is prepared in the laboratory? 11. What are the interhalogen compounds? Give the preparation of any one method? 12. What is innert pair effect? 13. What happens when phosphoric acid is heated? 14. H 3 PO 3 is diprotic why? 15. H 3 PO 4 is Triprotic why? 16. How is lenon fluorine prepared? 17. Mention the uses of potash alumn? 18. Write preparation of ClF, ClF 3 and IF 7
35, 36 d block element 1. Why Ni 2+ salt are white why Ni 3+ is coloured 2. What is the action AgNO 3. Write the equation? 3. Why do d block element exhibits various oxidation state? 4. What is spitting of silver. How is it prevented? 5. How is Lunar caustic prepared? 6. Why Mn 2+ is more stable than Mn 3+? 7. What is the action of copper sulphate crystal? 8. Why do block element forms complexes? 9. Explain chromyl test with equation? 10. Why are transition metals ions colored? 11. How is purple cassius prepared? 12. Write the action of aqua regia on Gold? 13. How is chrome plating done? 14. What happen when KI solution added to an aquoes solution of CuSo 4? 15. What is action of Zinc on hot NaOH? 16. What is the reaction of CUSO 4 with KCN? 17. Explain electrolytic refining of Copper? 37 Nuclear Chemistry 1. What is nuclear fission reaction Example? 2. What is nuclear fusion reaction Example? 3. Mention the uses of radio carbon dating? 38 Solid State 1. How are glass formed? 2. What are the superconductors? 3. Sketch i) SC ii) BCC iii) FCC 4. What is vitreous state? Example? 5. State Bragg s law? 6. What is molecular crystal and Example? 7. Write the application of superconductor? 8. Write note on freckle defect? 9. What means by superconducting transition temperature? 10. Determine the NO of CSCl per unit cell and BCC arrangement? 11. Write a note on the assignment of atoms per unit cell in FCC? 39 - Thermodynamics 1. State Kelvin planck statement? 2. State classius statement? 3. Give entropy statement and unit? 4. How is g is related to H and S 5. State Trouten rule? 6. What is substances that deviated from Trouten rule? 7. What is the nature of reaction, when i) G = 0 ii) G > 0 iii) G < 0
40 Chemical equilibrium 1. State Le chatelier s principle? 2. Dissociation of PCl 5. Decrease in presence of increase in Cl 2 why? 3. Define reaction quotient? 4. What is the equilibrium constant? 5. Why is equilibrium reaction refered to dynamic equilibrium? 6. What happens when G = 0, G = negative AG = +ve 41, 42 Chemical Kinetics 1. What are emulson? 2. What is electrophoresis? 3. Define colloidal solution? 4. What is the active centre? 5. What is Brownian movement? 6. What is Leophillic sols Example? 7. What is dyndall effect? 8. Mention any three general character of catalytic reaction? 9. What are the promoters? 10. Difference between physical and chemical adsorption? 11. What is electrodialysis? 12. What is heterogeneous catalysis? 13. What is Tanning? 14. What is catalytic poison? 15. Why is colloidal system of gas does not exists? 43 Surface Chemistry 1. Write the Arrhenius equation and explain terms? 2. What is opposing reaction giver an Example 3. What is parallel reaction? Example? 4. What is consecutive reaction? Example? 5. Define order of reaction? 6. What is activation energy? 7. What is simple and complex reaction Example? 8. Derive an equation for the half life period of 1 st order reaction? 9. What is pseudo first order reaction Example? 10. Give three Example for 1 st order reaction? 11. Write any two characteristic of 1 st order reaction? 44 Electro chemistry - I 1. What is common ion effect? 2. What is equivalent conductance? 3. State Kohlraush s law? 4. State ostwald dilusion law? 5. Define electro chemical equivalent and unit? 6. What do you understand by buffer solution? 7. What is ionic product of H 2 O? 8. Why does the metallic conductance decreases with increases in temperature?
45 Isomerism in Organic chemistry 1. Difference racemic mixture and mesoform 2. Distinguish bet enentionner and diastereomer? 3. Mesotartaric acid is an optically inactive compound with asymmetric carbon atoms justify? 4. Structure of cis and Trans isomers of (two) 2 pentanone 5. What is racemic mixture? 6. Give the conditions of required for compound to exhibit optical isomerism? 7. What are optical Isomerism? 8. What are the conditions for a compound to be optically active? 46, 47 Hydroxy derivatrives 1. What is Reimer Tieman reaction? 2. Give any three points of test for phenol? 3. Lederer manasse reaction? 4. Phenol how to react with ammonia? 5. How to prepare Terrylene (or) Dacron? 6. Coupling with diazonium chloride? 7. Kolbe s (or) Kolbe s schimidt reaction? 8. Phthalein fusion? 9. Mention fest for phenol? 10. Dow process? 11. Start from phenol, how will you prepare picric acid? 12. How can the consumption of alcohol by a person detected? 13. Alcohol cannot be used as solvent for Grignard reagent why? 14. Schotten Bauman? 15. Ethylene oxidiseel Beayer s reagent? 48 Carbonyl compound 1. What is formoline? And one uses? 2. How to prepare urotropin? Uses? 3. Naming reaction: i) Friedle craft Acylation ii) Rosement reduction iii) Clemenson reaction iv) Haloform reaction 4. Mention any three test for aldehyde? 50 Organic in Nitrogen compound 1. Gabriel phthalimide synthesisc 2. What is diazotization or coupling reaction
51 Chemistry in action 1. Chemothetics example 2. Anaesthetics example 3. Analgesic example 4. What are the Antioxidant? 5. What is antibiotic? 6. What is Antacids? 7. What is food preservative? 8. What is Anti protocol 9. What is Auxochrone 10. What is chromogen 11. Given any 3 general characteristic of dye 12. What is polystyrene 13. What is rocket propellant? 14. What is polyaide 15. Mention any 2 uses for BUNA rubbers 16. What is sweating reagent?