{"id":22112,"date":"2018-11-21T16:40:37","date_gmt":"2018-11-21T11:10:37","guid":{"rendered":"http:\/\/mycbseguide.com\/blog\/?p=22112"},"modified":"2018-12-17T14:22:20","modified_gmt":"2018-12-17T08:52:20","slug":"cbse-question-paper-2008-class-12-chemistry","status":"publish","type":"post","link":"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2008-class-12-chemistry\/","title":{"rendered":"CBSE Question Paper 2008 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-2008-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-2008-class-12-chemistry\/#CBSE_Question_Paper_2008_class_12_Chemistry\" >CBSE Question Paper 2008 class 12 Chemistry<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2008-class-12-chemistry\/#General_Instructions\" >General Instructions<\/a><\/li><\/ul><\/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-2008-class-12-chemistry\/#Chemistry_Question_Paper_2008\" >Chemistry Question Paper 2008<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2008-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 2008 class 12 Chemistry<\/strong>\u00a0conducted by Central Board of Secondary Education, New Delhi in the month of March 2008. 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 2008 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 2008 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_2008_class_12_Chemistry\"><\/span>CBSE Question Paper 2008 class 12 Chemistry<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 style=\"text-align: left;\"><span class=\"ez-toc-section\" id=\"General_Instructions\"><\/span><strong>General Instructions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div>\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. What type of substances exhibits antiferromagnetism. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>2. Express the relation between conductivity and molar conductivity of a Solution. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>3. Which has a higher enthalpy of adsorption, physisorption of chemisorption? [1]<\/strong><\/p>\n<hr \/>\n<p><strong>4. Write the IUPAC name of the following compound:<\/strong><\/p>\n<p><strong><img decoding=\"async\" id=\"Picture 18\" style=\"height: 54px; width: 213px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image008.jpg\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>5. In Which one of the two structures, <img decoding=\"async\" style=\"height: 26px; width: 104px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image009.png\" \/>\u00a0the bond angle has a higher value? [1]<\/strong><\/p>\n<hr \/>\n<p><strong>6. Name a substance that can be used as an antiseptic as well as a disinfectant. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>7. Arrange the following compounds in an increasing order of their acid Strengths. [1]\n<img decoding=\"async\" style=\"height: 27px; width: 128px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image011.png\" \/><img decoding=\"async\" style=\"height: 27px; width: 170px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image012.png\" \/><img decoding=\"async\" style=\"height: 27px; width: 165px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image013.png\" \/><br \/>\n<\/strong><\/p>\n<hr \/>\n<p><strong>8. Write a chemical reaction in which the iodide ion replaces the diazonium group in a diazonium salt. [1]<\/strong><\/p>\n<hr \/>\n<p><strong>9. Formulate the galvanic cell in which the following reaction takes place: [2]\n<img decoding=\"async\" style=\"height: 27px; width: 144px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image018.png\" \/><img decoding=\"async\" style=\"height: 27px; width: 130px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image019.png\" \/><\/strong><\/p>\n<p><strong>State:<br \/>\n(i) Which one of its electrodes is negatively charged.<br \/>\n(ii) The reaction taking place at each of its electrode.<br \/>\n(iii) The carriers of current within this cell,<\/strong><\/p>\n<hr \/>\n<p><strong>10. The resistance of a conductivity cell containing <img decoding=\"async\" style=\"height: 19px; width: 88px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image025.png\" \/>\u00a0Solution at <img decoding=\"async\" style=\"height: 19px; width: 111px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image026.png\" \/>\u00a0What is the cell constant if the conductivity of <img decoding=\"async\" style=\"height: 19px; width: 88px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image025.png\" \/>\u00a0solution at <img decoding=\"async\" style=\"height: 21px; width: 198px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image027.png\" \/>\u00a0[2]<\/strong><\/p>\n<hr \/>\n<p><strong>11. State Raoult&#8217;s law for solutions of volatile liquids. Taking suitable examples explain the meaning of positive and negative deviations from Raoult&#8217;s law. [2]<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>Or<\/strong><\/p>\n<p><strong>Define the term osmotic pressure. Describe how the molecular mass of a substance can be determined by a method based on measurement of Osmotic pressure.<\/strong><\/p>\n<hr \/>\n<p><strong>12. Assign a reason for each of the following statements: [2]\n(i) Ammonia is a stronger base than phosphine.<br \/>\n(ii) Sulphur in vapour state exhibits a paramagnetic behavior.<\/strong><\/p>\n<hr \/>\n<p><strong>13. Draw the structures of the following molecules: [2]\n(i) <img decoding=\"async\" style=\"height: 25px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image043.png\" \/><br \/>\n(ii) <img decoding=\"async\" style=\"height: 25px; width: 36px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image044.png\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>14. Explain as to why haloarenes are much less reactive than haloalkanes towards nucleophilic substitution reactions. [2]<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>OR<\/strong><\/p>\n<p><strong>Which compound in each of the following pairs will react faster in <img decoding=\"async\" style=\"height: 25px; width: 32px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image047.png\" \/>\u00a0reaction with <img decoding=\"async\" style=\"height: 19px; width: 39px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image048.png\" \/>? Why?<br \/>\n(i) <img decoding=\"async\" style=\"height: 25px; width: 111px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image049.png\" \/><br \/>\n(ii) <img decoding=\"async\" style=\"height: 27px; width: 150px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image050.png\" \/><\/strong><\/p>\n<hr \/>\n<p><strong>15. (a) State the IUPAC name of the following compound: [2]\n<img decoding=\"async\" id=\"Picture 8\" style=\"height: 84px; width: 151px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image056.jpg\" \/><br \/>\n(b) Complete the following chemical equation.<br \/>\n<img decoding=\"async\" style=\"height: 26px; width: 254px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image057.png\" \/>\u00a0<\/strong><\/p>\n<hr \/>\n<p><strong>16. What are biodegradable and non-biodegradable detergents. Give one example of each class. [2]<\/strong><\/p>\n<hr \/>\n<p><strong>17. Define the following terms in relation to proteins: [2].<br \/>\n(i) Peptide linkage<br \/>\n(ii) Denaturation<\/strong><\/p>\n<hr \/>\n<p><strong>18. List the reactions of glucose which cannot be explained by its open chain structure. [2]<\/strong><\/p>\n<hr \/>\n<p><strong>19. How Would you account for the following? [3]\n(i) Frenkel defects are not found in alkali metal halides.<br \/>\n(ii) Schottky defects lower the density of related solids.<br \/>\n(iii) Impurity doped Silicon is a semiconductor,<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>Or<\/strong><\/p>\n<p><strong>Explain the following properties giving suitable examples:<br \/>\n(i) Ferromagnetism<br \/>\n(ii) Paramagnetism<br \/>\n(iii) Ferrimagnetism<\/strong><\/p>\n<hr \/>\n<p><strong>20. Calculate the temperature at which a solution containing <img decoding=\"async\" style=\"height: 21px; width: 35px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image067.png\" \/>\u00a0of glucose, <img decoding=\"async\" style=\"height: 27px; width: 140px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image068.png\" \/>\u00a0of water will freeze. <img decoding=\"async\" style=\"height: 29px; width: 228px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image069.png\" \/>\u00a0[3]<\/strong><\/p>\n<hr \/>\n<p><strong>21. Explain the basic principles of following metallurgical operations: [3]<\/strong><\/p>\n<p><strong>(i) Zone refining<br \/>\n(ii) Vapour phase refining<br \/>\n(iii) Electrolytic refining<\/strong><\/p>\n<hr \/>\n<p><strong>22. Explain What is observed when: [3]<\/strong><\/p>\n<p><strong>(i) an electrolyte, KC, is added to hydrated ferric oxide solution<br \/>\n(ii) an electric current is passed through a colloidal Solution<br \/>\n(iii) a beam of strong light is passed through a colloidal solution<\/strong><\/p>\n<hr \/>\n<p><strong>23. Write the names and structures of the monomers of the following polymers: [3]<\/strong><\/p>\n<p><strong>(i) Buna-S<br \/>\n(ii) Neoprene<br \/>\n(iii) Nylon-6<\/strong><\/p>\n<hr \/>\n<p><strong>24. Account for the following observations: [3]<\/strong><\/p>\n<p><strong>(i) <img decoding=\"async\" style=\"height: 25px; width: 30px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image079.png\" \/>\u00a0for aniline is more than that for methylamine,<br \/>\n(ii) Methylamine solution in water reacts with ferric chloride solution to give a recipitate of ferric hydroxide,<br \/>\n(iii) Aniline does not undergo Friedel-Crafts reaction.<\/strong><\/p>\n<hr \/>\n<p><strong>25. (a) What is a ligand? Give an example of a bidentate ligand. [3]\n(b) Explain as to how the two complexes of nickel, <img decoding=\"async\" style=\"height: 32px; width: 193px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image085.png\" \/>\u00a0have different structures but do not differ in their magnetic behaviour. (Ni = 28)<\/strong><\/p>\n<hr \/>\n<p><strong>26. Name the reagents which are used in the following conversions: [3]<\/strong><\/p>\n<p><strong>(i) A primary alcohol to an aldehyde<br \/>\n(ii) Butan-2-one to butan-2-ol<br \/>\n(iii) Phenol to 2, 4, 6-tribromophenol<\/strong><\/p>\n<hr \/>\n<p><strong>27. Write chemical equations for the following processes: [3]\n(i) Chlorine reacts with a hot concentrated solution of sodium hydroxide<br \/>\n(ii) Orthophosphorous acid is heated<br \/>\n(iii) <img decoding=\"async\" style=\"height: 25px; width: 39px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image096.png\" \/>\u00a0and Xenon are mixed together<\/strong><\/p>\n<hr \/>\n<p><strong>28. Assign reasons for the following: [5]<\/strong><\/p>\n<p><strong>(i) The enthalpies of atomisation of transition elements are high,<br \/>\n(ii) The transition metals and many of their compounds act as good catalyst.<br \/>\n(iii). From element to element the actinoid contraction is greater than the lanthanoid contraction.<br \/>\n(iv) The <img decoding=\"async\" style=\"height: 20px; width: 21px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image098.png\" \/>\u00a0value for the <img decoding=\"async\" style=\"height: 21px; width: 81px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image099.png\" \/>\u00a0couple is much more positive than that for <img decoding=\"async\" style=\"height: 21px; width: 77px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image100.png\" \/><br \/>\n(v). Scandium (Z = 21) does not exhibit variable oxidation states and yet it is regarded as a transition element.<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>OR<\/strong><\/p>\n<p><strong>(a) What may be the possible oxidation states of the transition metals with the following d electronic configurations in the ground state of their atoms:<br \/>\n<img decoding=\"async\" style=\"height: 25px; width: 192px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image101.png\" \/>\u00a0Indicate relative stability of oxidation states in each case.<\/strong><\/p>\n<p><strong>(b) Write steps involved in the preparation of<br \/>\n(i) <img decoding=\"async\" style=\"height: 25px; width: 63px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image102.png\" \/>\u00a0from chromite ore and<br \/>\n(ii) <img decoding=\"async\" style=\"height: 25px; width: 60px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image103.png\" \/>\u00a0from pyrolusite ore. [3, 2]<\/strong><\/p>\n<hr \/>\n<p><strong>29. (a) Derive the general form of the expression for the half-life of a first Order reaction.<br \/>\n(b) The decomposition of NH on platinum surface is a zero-order reaction. What are the rates of production of <img decoding=\"async\" style=\"height: 26px; width: 262px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image121.png\" \/>\u00a0[2, 3]<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>Or<\/strong><\/p>\n<p><strong>(a) List the factors that affect the Tate of a chemical reaction.<br \/>\n(b) The half-life of radioactive decay of <img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image122.png\" \/>\u00a0is <img decoding=\"async\" style=\"height: 21px; width: 78px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image123.png\" \/>\u00a0An archaeological artefact containing wood had only <img decoding=\"async\" style=\"height: 19px; width: 33px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image124.png\" \/>\u00a0of <img decoding=\"async\" style=\"height: 21px; width: 27px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image122.png\" \/>\u00a0activity found in living tree. Estimate the age of the artefact. [2, 3]<\/strong><\/p>\n<hr \/>\n<p><strong>30. (a) Complete the following reaction statements by giving the missing starting material, reagent or product as required: [3, 2]\n<img decoding=\"async\" id=\"Picture 5\" style=\"height: 150px; width: 230px;\" src=\"https:\/\/media-mycbseguide.s3.amazonaws.com\/images\/static\/lyp\/12\/chemistry\/2008_03\/image149.png\" \/><br \/>\n(b) Describe the following reactions:<br \/>\n(i) Cannizaro reaction<br \/>\n(ii) Cross aldol condensation<\/strong><\/p>\n<p style=\"text-align: center;\"><strong>OR<\/strong><\/p>\n<p><strong>(a) How would you account for the following: [3, 2]\n(i) Aldehydes are more reactive than ketones towards nucleophiles.<br \/>\n(ii) The boiling points of aldehydes and ketones are lower than of the corresponding acids.<br \/>\n(iii) The aldehydes and ketones undergo a number of addition reactions.<\/strong><\/p>\n<p><strong>(b) Give chemical tests to distinguish between:<br \/>\n(i) Acetaldehyde and benzaldehyde<br \/>\n(ii) Propanone and propanol<\/strong><\/p>\n<\/div>\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_2008\"><\/span>Chemistry Question Paper 2008<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 2008 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 2008 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 2008 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 2008 class 12 Chemistry\u00a0conducted by Central Board of Secondary Education, New Delhi in the month of March 2008. 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 2008 class 12 Chemistry\" class=\"read-more\" href=\"https:\/\/mycbseguide.com\/blog\/cbse-question-paper-2008-class-12-chemistry\/\" aria-label=\"More on CBSE Question Paper 2008 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":[1527,80,1566],"class_list":["post-22112","post","type-post","status-publish","format-standard","hentry","category-cbse","category-cbse-question-papers","category-chemistry-cbse-class-12","tag-cbse-question-paper","tag-last-year-papers","tag-previous-question-paper"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CBSE Question 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