{"id":22097,"date":"2018-11-21T14:56:48","date_gmt":"2018-11-21T09:26:48","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=22097"},"modified":"2018-12-17T14:24:04","modified_gmt":"2018-12-17T08:54:04","slug":"cbse-question-paper-2011-class-12-chemistry","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2011-class-12-chemistry\/","title":{"rendered":"CBSE Question Paper 2011 Class 12 Chemistry"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2011-class-12-chemistry\/#Class_12_Chemistry_list_of_chapters\" >Class 12 Chemistry list of chapters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2011-class-12-chemistry\/#CBSE_Question_Paper_2011_class_12_Chemistry\" >CBSE Question Paper 2011 class 12 Chemistry<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2011-class-12-chemistry\/#Chemistry_Question_Paper_2011\" >Chemistry Question Paper 2011<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2011-class-12-chemistry\/#Previous_Year_Question_Paper_for_class_12_in_PDF\" >Previous Year Question Paper for class 12 in PDF<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong>CBSE Question Paper 2011 class 12 Chemistry<\/strong>\u00a0conducted by Central Board of Secondary Education, New Delhi in the month of March 2011. 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.<\/p>\n<p style=\"text-align: center;\"><strong>CBSE Question Paper 2011 class 12 Chemistry\u00a0<\/strong><\/p>\n<p style=\"text-align: center;\"><strong><a class=\"button\" href=\"https:\/\/mycbseguide.com\/downloads\/cbse-class-12-chemistry\/1267\/cbse-last-year-papers\/3\/\">Download as PDF<\/a><\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/media-mycbseguide.s3.ap-south-1.amazonaws.com\/images\/blog\/Class%2012%20Chemistry%20Book%20in%20English.jpg\" alt=\"CBSE Question Paper 2011 class 12 Chemistry\" width=\"124\" height=\"159\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Class_12_Chemistry_list_of_chapters\"><\/span>Class 12 Chemistry list of chapters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>The Solid State<\/li>\n<li>Solutions<\/li>\n<li>Electrochemistry<\/li>\n<li>Chemical Kinetics<\/li>\n<li>Surface Chemistry<\/li>\n<li>General Principles and Processes of Isolation of Elements<\/li>\n<li>The p-Block Elements<\/li>\n<li>The d and f Block Elements<\/li>\n<li>Coordination Compounds<\/li>\n<li>Haloalkanes and Haloarenes<\/li>\n<li>Alcohols, Phenols and Ethers<\/li>\n<li>Aldehydes, Ketones and Carboxylic Acids<\/li>\n<li>Amines<\/li>\n<li>Biomolecules<\/li>\n<li>Polymers<\/li>\n<li>Chemistry in Everyday life<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Question_Paper_2011_class_12_Chemistry\"><\/span>CBSE Question Paper 2011 class 12 Chemistry<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div>\n<p><strong>General Instructions<\/strong>:<\/p>\n<ol>\n<li>All questions are compulsory.<\/li>\n<li>Marks for each question are indicated against it.<\/li>\n<li>Question numbers 1 to 8\u00a0are very short-answer questions, carrying 1 mark each.\u00a0Answer these in one word or about one sentence each.<\/li>\n<li>Question numbers 9\u00a0to 18\u00a0are short-answer questions, carrying 2 marks each.\u00a0Answer these in about 30 words each.<\/li>\n<li>Question numbers 19\u00a0to 27\u00a0are short-answer questions of 3 marks each. Answer\u00a0these in about 40 words each.<\/li>\n<li>Question numbers 28\u00a0to 30\u00a0are long-answer questions of 5 marks each. Answer these in about 70 words each.<\/li>\n<li>Use Log Tables, if necessary Use of calculators is not permitted.<\/li>\n<\/ol>\n<hr \/>\n<p><strong>1. &#8216; Crystalline solids are anisotropic in nature.&#8217; What does this statement mean? [1]<\/strong><\/p>\n<hr \/>\n<p><strong>2. Express the relation between conductivity and molar conductivity of a solution held in a cell. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>3. Define &#8216;electrophoresis&#8217;. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>4. Draw the structure of <img decoding=\"async\" style=\"height: 25px; width: 36px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image008.png\" \/>\u00a0molecule. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>5. Write the IUPAC name of the following compound: [1]<\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 27px; width: 111px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image010.png\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>6. Draw the structure of 3-methy lbutanal. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>7. Arrange the following compounds in an increasing order of their solubility in water: [1]<\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 27px; width: 224px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image012.png\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>8. What are biodegradable polymers? [1]<\/strong><\/p>\n<hr \/>\n<p><strong>9. The chemistry of corrosion of iron is essentially an electrochemical phenomenon. Explain the reactions occurring during the corrosion of iron in the atmosphere. [2]<\/strong><\/p>\n<hr \/>\n<p><strong>10. Determine the values of equilibrium constant <img decoding=\"async\" style=\"height: 27px; width: 37px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image020.png\" \/>\u00a0and <img decoding=\"async\" style=\"height: 21px; width: 32px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image021.png\" \/>\u00a0for the following reaction:<\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 27px; width: 142px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image022.png\" \/><img decoding=\"async\" style=\"height: 27px; width: 210px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image023.png\" \/><img decoding=\"async\" style=\"height: 29px; width: 144px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image024.png\" \/>\u00a0[2]<\/strong><\/p>\n<hr \/>\n<p><strong>11. Distinguish between &#8216; rate expression&#8217; and &#8216; rate constant&#8217; of a reaction. [2]<\/strong><\/p>\n<hr \/>\n<p><strong>12. State reasons for each of the following: [2]<\/strong><\/p>\n<p><strong>(i) The <img decoding=\"async\" style=\"height: 19px; width: 44px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image032.png\" \/>\u00a0bond in <img decoding=\"async\" style=\"height: 26px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image033.png\" \/>\u00a0is shorter than the <img decoding=\"async\" style=\"height: 19px; width: 44px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image032.png\" \/>\u00a0bond in <img decoding=\"async\" style=\"height: 26px; width: 39px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image034.png\" \/>\u00a0<\/strong><\/p>\n<p><strong>(ii) <img decoding=\"async\" style=\"height: 25px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image035.png\" \/>\u00a0is kinetically an inert substance.<\/strong><\/p>\n<p><strong>OR<\/strong><\/p>\n<p><strong>State reasons for each of the following:<\/strong><\/p>\n<p><strong>(i) All the P-Cl bonds in <img decoding=\"async\" style=\"height: 25px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image036.png\" \/>\u00a0molecule are not equivalent.<\/strong><\/p>\n<p><strong>(ii) Sulphur has greater tendency for catenation than oxygen.<\/strong><\/p>\n<hr \/>\n<p><strong>13. Assign reasons for the following: [2]<\/strong><\/p>\n<p><strong>(i) Copper (I) ion is not known in aqueous solution.<\/strong><\/p>\n<p><strong>(ii) Actinoids exhibit greater range of oxidation states than lanthanoids.<\/strong><\/p>\n<p><strong>Ans.<\/strong> i) Because copper(I) ion is unstable in aqueous solution and undergoes, disproportionation.<\/p>\n<p>ii) Because of comparable energies of <img decoding=\"async\" style=\"height: 21px; width: 89px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image045.png\" \/>\u00a0orbitals in actinoids.<\/p>\n<hr \/>\n<p><strong>14. Explain the following giving one example for each: [2]<\/strong><\/p>\n<p><strong>(i) Reimer -Tiemann reaction.<\/strong><\/p>\n<p><strong>(ii) Friedel Craft&#8217; s acety lation of anisole.<\/strong><\/p>\n<hr \/>\n<p><strong>15. How would you obtain [2]<\/strong><\/p>\n<p><strong>(i) Picric acid (2, 4, 6-trinitrophenol) from phenol,<\/strong><\/p>\n<p><strong>(ii) 2-Methy lpropene from 2-methy lpropanol?<\/strong><\/p>\n<hr \/>\n<p><strong>16. What is essentially the difference between a-form of glucose and b-form of glucose? Explain. [2]<\/strong><\/p>\n<hr \/>\n<p><strong>17. Describe what you understand by primary structure and secondary structure of proteins. [2]<\/strong><\/p>\n<hr \/>\n<p><strong>18. Mention two important uses of each of the following: [2]<\/strong><\/p>\n<p><strong>(i) Bakelite<\/strong><\/p>\n<p><strong>(ii) Nylon6<\/strong><\/p>\n<hr \/>\n<p><strong>19. Silver crystallizes in face-centered cubic unit cell. Each side of this unit cell has a length of 400 pm. Calculate the radius of the silver atom. (Assume the atoms just touch each other on the diagonal across the face of the unit cell. That is each face atom is touching the four comer atoms.) [3]<\/strong><\/p>\n<hr \/>\n<p><strong>20. Nitrogen pentoxide decomposes according to equation: <img decoding=\"async\" style=\"height: 27px; width: 213px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image061.png\" \/><\/strong><\/p>\n<p><strong>This first order reaction was allowed to proceed at 40 \u00b0C and the data below were collected:<\/strong><\/p>\n<table class=\"mobile\" border=\"1\" cellspacing=\"1\" cellpadding=\"3\">\n<tbody>\n<tr>\n<td><strong><img decoding=\"async\" style=\"height: 27px; width: 80px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image062.png\" \/><\/strong><\/td>\n<td><strong>Time (min)<\/strong><\/td>\n<\/tr>\n<tr>\n<td>0.400<\/td>\n<td>0.00<\/td>\n<\/tr>\n<tr>\n<td>0.289<\/td>\n<td>20.0<\/td>\n<\/tr>\n<tr>\n<td>0.209<\/td>\n<td>40.0<\/td>\n<\/tr>\n<tr>\n<td>0.151<\/td>\n<td>60.0<\/td>\n<\/tr>\n<tr>\n<td>0.109<\/td>\n<td>80.0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>(a) Calculate the rate constant. Include units with y our answer.<\/strong><\/p>\n<p><strong>(b) What will be the concentration of <img decoding=\"async\" style=\"height: 25px; width: 37px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image063.png\" \/>\u00a0after 100 minutes?<\/strong><\/p>\n<p><strong>(c) Calculate the initial rate of reaction. [3]<\/strong><\/p>\n<hr \/>\n<p><strong>21. Explain how the phenomenon of adsorption finds application in each of the following processes: [3]<\/strong><\/p>\n<p><strong>(i) Product ion of vacuum<\/strong><\/p>\n<p><strong>(ii) Heterogeneous catalysis<\/strong><\/p>\n<p><strong>(iii) Froth Floatation process<\/strong><\/p>\n<p><strong>OR<\/strong><\/p>\n<p><strong>Define each of the following terms: [3]<\/strong><\/p>\n<p><strong>(i) Micelles<\/strong><\/p>\n<p><strong>(ii) Peptization<\/strong><\/p>\n<p><strong>(iii) Desorption<\/strong><\/p>\n<hr \/>\n<p><strong>22. Describe the principle behind each of the following processes: [3]<\/strong><\/p>\n<p><strong>(i) Vapour phase refining of a metal.<\/strong><\/p>\n<p><strong>(ii) Elect rolytic refining of a metal.<\/strong><\/p>\n<p><strong>(iii) Recovery of silver after silver ore was leached with <img decoding=\"async\" style=\"height: 19px; width: 50px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image073.png\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>23. Complete the following chemical equations: [3]<\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 26px; width: 172px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image077.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 26px; width: 137px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image078.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 26px; width: 173px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image079.png\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>24. Write the name, stereochemistry and magnetic behaviour of the following: [3]<\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 27px; width: 227px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image086.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 29px; width: 123px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image087.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 29px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image088.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 29px; width: 126px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image089.png\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>25. Answer the following: [3]<\/strong><\/p>\n<p><strong>(i) Haloalkanes easily dissolve in organic solvents, why?<\/strong><\/p>\n<p><strong>(ii) What is known as a racemic mixture? Give an example.<\/strong><\/p>\n<p><strong>(iii) Of the two bromoderivatives, <img decoding=\"async\" style=\"height: 27px; width: 153px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image093.png\" \/><img decoding=\"async\" style=\"height: 27px; width: 135px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image094.png\" \/>\u00a0which one is more reactive in<img decoding=\"async\" style=\"height: 25px; width: 28px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image095.png\" \/>\u00a0substitution reaction and why?<\/strong><\/p>\n<hr \/>\n<p><strong>26. (a) Explain why an alkylamine is more basic than ammonia.<\/strong><\/p>\n<p><strong>(b) How would you convert<\/strong><\/p>\n<p><strong>(i) Aniline to nitrobenzene<\/strong><\/p>\n<p><strong>(ii) Aniline to iodobenzene? [3]<\/strong><\/p>\n<hr \/>\n<p><strong>27. Describe the following giving one example for each: [3]<\/strong><\/p>\n<p><strong>(i) Detergents<\/strong><\/p>\n<p><strong>(ii) Food preservatives<\/strong><\/p>\n<p><strong>(iii) Antacids<\/strong><\/p>\n<hr \/>\n<p><strong>28. (a) Differentiate between molarity and molality for a solution. How does a change in temperature influence their values?<\/strong><\/p>\n<p><strong>(b) Calculate the freezing point of an aqueous solution containing <img decoding=\"async\" style=\"height: 25px; width: 233px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image101.png\" \/><img decoding=\"async\" style=\"height: 25px; width: 200px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image102.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 26px; width: 210px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image103.png\" \/>\u00a0[5]<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>OR<\/strong><\/p>\n<p><strong>(a) Define the terms osmosis and osmotic pressure. Is the osmotic pressure of a solution a colliative property? Explain.<\/strong><\/p>\n<p><strong>(b) Calculate the boiling point of a solution prepared by adding <img decoding=\"async\" style=\"height: 21px; width: 233px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image104.png\" \/><img decoding=\"async\" style=\"height: 26px; width: 218px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image105.png\" \/><img decoding=\"async\" style=\"height: 21px; width: 205px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image106.png\" \/>\u00a0[5]<\/strong><\/p>\n<hr \/>\n<p><strong>29. (a) Give chemical tests to di stinguish between<\/strong><\/p>\n<p><strong>(i) Propanal and propanone,<\/strong><\/p>\n<p><strong>(ii) Benzaldehyde and acetophenone.<\/strong><\/p>\n<p><strong>(b) How would you obtain<\/strong><\/p>\n<p><strong>(i) But-2-enal from ethanal,<\/strong><\/p>\n<p><strong>(ii) Butanoic acid from butanol,<\/strong><\/p>\n<p><strong>(iii) Benzoic acid from ethylbenzene? [5]<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>OR<\/strong><\/p>\n<p><strong>(a) Describe the following giving linked chemical equations:<\/strong><\/p>\n<p><strong>(i) Cannizzaro reaction<\/strong><\/p>\n<p><strong>(ii) Decarboxylation<\/strong><\/p>\n<p><strong>(b) Complete the following chemical equations:<\/strong><\/p>\n<p><strong><img decoding=\"async\" id=\"Picture 2\" style=\"height: 250px; width: 299px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image118.jpg\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>30. (a) Explain the following:<\/strong><\/p>\n<p><strong>(i) <img decoding=\"async\" style=\"height: 25px; width: 29px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image134.png\" \/>\u00a0is an exothermic compound whereas <img decoding=\"async\" style=\"height: 25px; width: 36px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image135.png\" \/>\u00a0is not.<\/strong><\/p>\n<p><strong>(ii) <img decoding=\"async\" style=\"height: 25px; width: 19px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image136.png\" \/>\u00a0is most reactive of all the four common halogens.<\/strong><\/p>\n<p><strong>(b) Complete the following chemical equations:<\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 25px; width: 153px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image137.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 25px; width: 164px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image138.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 35px; width: 117px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image139.png\" \/>\u00a0[5]<\/strong><\/p>\n<p><strong>OR<\/strong><\/p>\n<p><strong>(a) Account for the following:<\/strong><\/p>\n<p><strong>(i) The acidic strength decreases in the order <img decoding=\"async\" style=\"height: 25px; width: 102px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image140.png\" \/><\/strong><\/p>\n<p><strong>(ii) Tendency to form pentahalides decreases down the group in group 15 of the periodic table.<\/strong><\/p>\n<p><strong>(b) Complete the following chemical equations:<\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 25px; width: 116px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image141.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 25px; width: 123px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image142.png\" \/><\/strong><\/p>\n<p><strong><img decoding=\"async\" style=\"height: 35px; width: 117px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2011_01\/image143.png\" \/>\u00a0[5]<\/strong><\/p>\n<\/div>\n<p><!-- The polyfills js is generated during the build process --><!-- The vendor js is generated during the build process It contains all of the dependencies in node_modules --><!-- The main bundle js is generated during the build process --><\/p>\n<div>\n<p style=\"text-align: center;\"><strong>These are questions only. To view and download complete question paper with solution install myCBSEguide App from google play store or login to our\u00a0<a href=\"https:\/\/mycbseguide.com\/dashboard\/\">student dashboard<\/a>.<\/strong><\/p>\n<p style=\"text-align: center;\"><b><strong><a class=\"button\" href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\">Download myCBSEguide App<\/a><\/strong><\/b><\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Chemistry_Question_Paper_2011\"><\/span>Chemistry Question Paper 2011<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Download class 12 Chemistry question paper with solution from best CBSE App the myCBSEguide. CBSE class 12 Chemistry question paper 2011 in PDF format with solution will help you to understand the latest question paper pattern and marking scheme of the CBSE board examination. You will get to know the difficulty level of the question paper. CBSE question papers 2011 for class 12 Chemistry have 30 questions with solution.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Previous_Year_Question_Paper_for_class_12_in_PDF\"><\/span>Previous Year Question Paper for class 12 in PDF<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>CBSE question papers 2018, 2017, 2016, 2015, 2014, 2013, 2012, 2011, 2010, 209, 2008, 2007, 2006, 2005 and so on for all the subjects are available under this download link. Practicing real question paper certainly helps students to get confidence and improve performance in weak areas.<\/p>\n<ul>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-physics\/1251\/cbse-last-year-papers\/3\/\">Physics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-chemistry\/1267\/cbse-last-year-papers\/3\/\">Chemistry<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-mathematics\/1284\/cbse-last-year-papers\/3\/\">Mathematics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-biology\/1298\/cbse-last-year-papers\/3\/\">Biology<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-accountancy\/1315\/cbse-last-year-papers\/3\/\">Accountancy<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-business-studies\/1727\/cbse-last-year-papers\/3\/\">Business Studies<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-economics\/1327\/cbse-last-year-papers\/3\/\">Economics<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-history\/1869\/cbse-last-year-papers\/3\/\">History<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-geography\/1863\/cbse-last-year-papers\/3\/\">Geography<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-political-science\/1879\/cbse-last-year-papers\/3\/\">Political Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-physical-education\/1877\/cbse-last-year-papers\/3\/\">Physical Education<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-computer-science\/1851\/cbse-last-year-papers\/3\/\">Computer Science<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-informatics-practices\/1873\/cbse-last-year-papers\/3\/\">Informatics Practices<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-english-core\/1855\/cbse-last-year-papers\/3\/\">English Core<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-hindi-core\/1865\/cbse-last-year-papers\/3\/\">Hindi Core<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12-hindi-elective\/1867\/cbse-last-year-papers\/3\/\">Hindi Elective<\/a><\/li>\n<li><a href=\"http:\/\/mycbseguide.com\/downloads\/cbse-class-12\/1250\/\">Other Subjects<\/a><\/li>\n<\/ul>\n<p>To download CBSE Question Paper 2011 class 12 Accountancy, Chemistry, Physics, History, Political Science, Economics, Geography, Computer Science, Home Science, Accountancy, Business Studies and Home Science; do check myCBSEguide app or website. myCBSEguide provides sample papers with solution, test papers for chapter-wise practice, NCERT solutions, NCERT Exemplar solutions, quick revision notes for ready reference, CBSE guess papers and CBSE important question papers. Sample Paper all are made available through\u00a0<a href=\"https:\/\/play.google.com\/store\/apps\/details?id=in.techchefs.MyCBSEGuide&amp;referrer=utm_source%3Dmycbse_bottom%26utm_medium%3Dtext%26utm_campaign%3Dmycbseads\"><strong>the best app for CBSE students<\/strong><\/a>\u00a0and myCBSEguide website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>CBSE Question Paper 2011 class 12 Chemistry\u00a0conducted by Central Board of Secondary Education, New Delhi in the month of March 2011. 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 &#8230; <a title=\"CBSE Question Paper 2011 Class 12 Chemistry\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2011-class-12-chemistry\/\" aria-label=\"More on CBSE Question Paper 2011 Class 12 Chemistry\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1346,1014,1434],"tags":[1527,320,1342,80,1016],"class_list":["post-22097","post","type-post","status-publish","format-standard","hentry","category-cbse","category-cbse-question-papers","category-chemistry-cbse-class-12","tag-cbse-question-paper","tag-chemistry","tag-class-12","tag-last-year-papers","tag-previous-year-questions-papers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - 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