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CBSE Question Paper 2009 class 12 Chemistry conducted by Central Board of Secondary Education, New Delhi in the month of March 2009. CBSE previous year question papers with the solution are available in the myCBSEguide mobile app and website. The Best CBSE App for students and teachers is myCBSEguide which provides complete study material and practice papers to CBSE schools in India and abroad.
CBSE Question Paper 2009 class 12 Chemistry
Class 12 Chemistry list of chapters
- The Solid State
- Chemical Kinetics
- Surface Chemistry
- General Principles and Processes of Isolation of Elements
- The p-Block Elements
- The d and f Block Elements
- Coordination Compounds
- Haloalkanes and Haloarenes
- Alcohols, Phenols and Ethers
- Aldehydes, Ketones and Carboxylic Acids
- Chemistry in Everyday life
CBSE Question Paper 2009 class 12 Chemistry
- All questions are compulsory.
- Marks for each question are indicated against it.
- Question numbers 1 to 8 are very short-answer questions, carrying 1 mark each. Answer these in one word or about one sentence each.
- Question numbers 9 to 18 are short-answer questions, carrying 2 marks each. Answer these in about 30 words each.
- Question numbers 19 to 27 are short-answer questions of 3 marks each. Answer these in about 40 words each.
- Question numbers 28 to 30 are long-answer questions of 5 marks each. Answer these in about 70 words each.
- Use Log Tables, if necessary Use of calculators is not permitted.
1. Which point defect in its crystal units alters the density of a solid? 
2. Why is the froth flotation method selected for the concentration of Sulphide ores? 
3. Define the term ‘Tyndall effect.’ 
4. Which is a stronger oxidizing agent 
5. Why is an alkylamine more basic than ammonia? 
6. Write the structure of 3 – oxopentanal. 
7. Give the IUPAC name of the following compound: 
8. Give an example of elastomers. 
9. Explain the role of 
(i) Cryolite in the electrolytic reduction of alumina.
(ii) Carbon monoxide in the purification of nickel.
10. A reaction is of second order with respect to a reactant. How will the rate of reaction 
(ii) Reduced to half?
11. Differentiate between molality and molarity of solution. What is the effect of change in temperature of a solution on its molality and molarity? 
12. Draw the structures of the following molecules: 
13. Complete the following chemical reaction equations: 
14. Which ones in the following Pairs of substances undergoes substitution reaction faster and why? 
15. Explain what is meant by 
(i) a peptide linkage
(ii) a glycosidic linkage
16. Complete the following reaction equations: 
17. Draw the structures of the monomers of the following polymers: 
What is the repeating unit in the condensation polymer obtained by combining and
18. Name two water soluble vitamins, their sources and the diseases caused due to their deficiency in diet. 
19. of a protein is dissolved in just enough water to make of solution. If this solution has an osmotic pressure of what is the molar mass of the protein? 
20. Iron has a body centred cubic unit cell with a cell edge of The density of iron is Use this information to calculate Avogadro’s number 
21. What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids? 
22. A first order reaction has a rate constant of If we begin with concentration of the reactant, what concentration of reactant will remain in solution after 3 hours? 
23. For the complex identify 
(i) the oxidation number of iron,
(ii) the hybrid orbitals and the shape of the complex,
(iii) the magnetic behaviour of the complex,
(iv) the number of geometrical isomers,
(v) whether there is an optical isomer also, and
(vi) name of the complex, (At. no. of Fe = 26)
24. Explain the following observations: 
(i) Fluorine does not exhibit any positive oxidation state.
(ii) The majority of known noble gas compounds are those of Xenon.
(iii) Phosphorus is much more reactive than nitrogen.
25. Giving an example for each describe the following reactions: 
(i) Hofmann’s bromamide reaction
(ii) Gatterman reaction
(iii) A coupling reaction
26. Explain the mechanism of the following reactions: 
(i) Addition of Grignard’s reagent to the carbonyl group of a compound forming an adduct followed by hydrolysis.
(ii) Acid catalysed dehydration fan alcohol forming analkene.
(iii) Acid catalysed hydration of an alkene forming an alcohol.
27. How do antiseptics differ from disinfectants? Give one example of each type. 
28. (a) Complete the following chemical reaction equations: 
(b) Explain the following observations:
(i) Transition elements are known to form many interstitial compounds.
(ii) With the same configuration is reducing while is oxidising.
(iii) The enthalpies of atomization of the transition elements are quite high.
(a) Complete the following chemical reaction equations:
(b) Explain the following observations:
(i) Transition metals form compounds which are usually coloured.
(ii) Transition metals exhibit variable oxidation states.
(iii) The actinoids exhibit a greater range of oxidation states than the lanthanoids.
29. (a) What type of a cell is the lead storage battery? Write the anode and the cathode reactions and the overall reaction occurring in a lead storage battery while operating. 
(b) A voltaic cell is set up at with the half-cells,
Write the equation for the reaction that occurs when the cell generates an electric current and determine the cell potential.
(a) Express the relationship amongst cell constant, resistance of the solution in the cell and conductivity of the solution. How is molar conductivity of a solute related to conductivity of its solution?
(b) Calculate the equilibrium constant for the reaction
30. (a) Illustrate the following name reactions by giving example: 
(i) Cannizzaro’s reaction
(ii) Clemmensen reduction
(b) An organic compound A contains 69.77% carbon, 11.63% hydrogen and rest oxygen. The molecular mass of the compound is 86. It does not reduce Tollen’s reagent but forms and addition compound with sodium hydrogen sulphite and gives positive iodoform test. On vigorous oxidation is ethanoic and propanoic acids. Derive the possible structure of compound A.
(a) How are the following obtained?
(i) Benzoic acid from ethyl benzene.
(ii) Benzaldehyde from toluene.
(b) Complete each synthesis by giving the missing material, reagent or products:
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Chemistry Question Paper 2009
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Previous Year Question Paper for class 12 in PDF
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