{"id":38238,"date":"2022-01-25T18:27:08","date_gmt":"2022-01-25T12:57:08","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=38238"},"modified":"2024-12-13T15:01:19","modified_gmt":"2024-12-13T09:31:19","slug":"study-material-cbse-previous-year-question-papers-class-12-chemistry-2013-outside-delhi","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/study-material\/cbse-previous-year-question-papers\/class-12\/chemistry-2013\/outside-delhi\/","title":{"rendered":"Class 12 Chemistry 2013 Outside Delhi CBSE Previous Year Question Papers"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 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\">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\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><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><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse-previous-year-question-papers\/class-12\/chemistry-2013\/outside-delhi\/#CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi\" title=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi\">CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse-previous-year-question-papers\/class-12\/chemistry-2013\/outside-delhi\/#CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi_Set_I\" title=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I\">CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse-previous-year-question-papers\/class-12\/chemistry-2013\/outside-delhi\/#CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi_Set_II\" title=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set II\">CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set II<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse-previous-year-question-papers\/class-12\/chemistry-2013\/outside-delhi\/#CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi_Set_III\" title=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set III\">CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set III<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p><strong>Introduction: <span style=\"color: #0000ff;\">Class 12 Chemistry 2013 Outside Delhi <\/span><\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi\"><\/span><span style=\"font-size: 14pt;\">CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Time allowed: 3 hours<br \/>\nMaximum Marks: 70<\/p>\n<h3><span class=\"ez-toc-section\" id=\"CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi_Set_I\"><\/span>CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Question 1.<br \/>\nOf physisorption or chemisorption, which has a higher enthalpy of adsorption? [1]\nAnswer:<br \/>\nChemisorption.<\/p>\n<p>Question 2.<br \/>\nName the method used for refining of copper metal. [1]\nAnswer:<br \/>\nElectrolytic refining of copper metal.<\/p>\n<p>Question 3.<br \/>\nName two poisonous gases which can be prepared from chlorine gas. [1]\nAnswer:<br \/>\nChloropicrin or tear gas (CCl<sub>3<\/sub>NO<sub>2<\/sub>) and phosgene gas (COCl<sub>2<\/sub>).<\/p>\n<p>Question 4.<br \/>\nWrite the IUPAC name of the following compound: [1]\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572910991_3957d0eafa_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q4\" width=\"196\" height=\"107\" \/><br \/>\nAnswer:<br \/>\n2-chloro-3, 3-dimethyl butane.<\/p>\n<p>Question 5.<br \/>\nRearrange the following compounds in the increasing order of their boiling points: [1]\nCH<sub>3<\/sub>-CHO, CH<sub>3<\/sub>-CH<sub>2<\/sub>-OH<sub>2<\/sub>, CH<sub>3<\/sub> \u2013 CH<sub>2<\/sub> \u2013 CH<sub>3<\/sub><br \/>\nAnswer:<br \/>\nCH<sub>3<\/sub>CH<sub>2<\/sub>CH<sub>3<\/sub> &lt; CH<sub>3<\/sub>CHO &lt; CH<sub>3<\/sub>CH<sub>2<\/sub>OH<\/p>\n<p>Question 6.<br \/>\nWrite the structure of N-methylethanmine. [1]\nAnswer:<br \/>\n<img loading=\"lazy\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572911061_ec8e80b763_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q6\" width=\"172\" height=\"58\" \/><\/p>\n<p>Question 7.<br \/>\nWhat are the products of hydrolysis of sugar? [1]\nAnswer:<br \/>\nGlucose and fructose.<\/p>\n<p>Question 8.<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573062307_f0aea84379_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q8\" width=\"377\" height=\"64\" \/><br \/>\nAnswer:<br \/>\nHomopolymer.<\/p>\n<p>Question 9.<br \/>\nAccount for the following: [2]\n(i) Schottky defects lower the density of related solids.<br \/>\n(ii) The conductivity of silicon increases on doping it with phosphorus.<\/p>\n<p>Question 10.<br \/>\nAluminium crystallizes in an FCC structure. The atomic radius of the metal is 125 pm, what is the length of the side of the unit cell of the metal? [2]\n<p>Question 11.<br \/>\nThe standard electrode potential (E\u00b0) for Daniell cell is +1.1 V. Calculate \u2206G\u00b0 for the reaction: [2]\nZn (s) + Cu<sup>2+<\/sup>(aq) \u2192 Zn<sup>2+<\/sup>(aq) + Cu(s)<br \/>\n(1F = 96500 C\/mol)<br \/>\nAnswer:<br \/>\nn = 2, E\u00b0cell =1.1 volt, 1F = 96500 C mol<sup>-1<\/sup><br \/>\n\u2206rG\u00b0 = -nFE\u00b0cell<br \/>\n= -2 \u00d7 96500 \u00d7 1.1<br \/>\n= -212.3 kJ mol<sup>-1<\/sup><\/p>\n<p>Question 12.<br \/>\nFor a reaction A + B \u2192 P, the rate law is given by [2]\nr = k [A]<sup>1\/2<\/sup> [B]<sup>2<\/sup><br \/>\n(a) What is the order of this reaction?<br \/>\n(b) A first-order reaction is found to have a rate constant k = 5.5 x 10<sup>-14<\/sup> s<sup>-1<\/sup>. Find the half life of the reaction.<br \/>\nAnswer:<br \/>\n(a) Order of reaction = \\(\\frac { 1 }{ 2 }\\) + 2 = \\(\\frac { 5 }{ 2 }\\)<br \/>\n(b) For first order reaction,<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573062367_f2b0787cf9_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q12\" width=\"281\" height=\"109\" \/><\/p>\n<p>Question 13.<br \/>\n(a) Name the method used for removing gangue from sulphide ores. [2]\n(b) How is wrought iron different from steel?<br \/>\nAnswer:<br \/>\n(a) Froth floatation method.<br \/>\n(b) Wrought iron is the purest form of iron with 0.2-0.5% carbon and steel is an alloy of iron. Wrought iron is produced from cast iron. Steel is an alloy of iron and other elements. It has a carbon content of 0.1-1.5%. They also have different properties, industrial and decorative applications.<\/p>\n<p>Question 14.<br \/>\nDraw the structures of the following molecules:<br \/>\n(i) XeOF<sub>4<\/sub><br \/>\n(ii) H<sub>3<\/sub>PO<sub>3<\/sub> [2]\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572911316_aebb0017d4_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q14\" width=\"210\" height=\"179\" \/><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572911411_e4cdbf7fbf_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q14.1\" width=\"243\" height=\"207\" \/><\/p>\n<p>Question 15.<br \/>\nHow are interhalogen compounds formed? What general compositions can be assigned to them? [2]\nAnswer:<br \/>\nInterhalogen compounds are formed by direct combination of halogens or by the reaction of halogen on lower interhalogen compounds. The general composition of interhalogen compounds are:<br \/>\nXX\u2019, XX\u2019<sub>3<\/sub> XX\u2019<sub>5<\/sub>, XX\u2019<sub>7<\/sub><\/p>\n<p>Question 16.<br \/>\nExplain the mechanism of the following reaction: [2]\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573062577_a5aca7e6c0_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q16\" width=\"360\" height=\"43\" \/><br \/>\nAnswer:<br \/>\nMechanism: It involves three steps<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572911491_451a0c6752_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q16.1\" width=\"372\" height=\"390\" \/><\/p>\n<p>Question 17.<br \/>\nWrite the equations involved in the following reactions: [2]\n(i) Reimer-Tiemann reaction<br \/>\n(ii) Williamson ether synthesis<br \/>\nAnswer:<br \/>\n(i)<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572911576_8bb944b392_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q17\" width=\"385\" height=\"171\" \/><\/p>\n<p>Question 18.<br \/>\nDefine thermoplastic and thermosetting polymers. Give one example of each. [2]\nOR<br \/>\nWhat is a biodegradable polymer? Give an example of biodegradable aliphatic polyester.<br \/>\nAnswer:<br \/>\nThermoplastic Polymers: They are plastics which becomes soft on heating and can be remoulded. They have fewer forces e.g. Polythene.<br \/>\nThermosetting Polymers: They do not become soft on heating and cannot be remoulded. They have a strong force of attraction e.g. bakelite.<br \/>\nOR<br \/>\nNatural polymers such as starch and cellulose that naturally disintegrate themselves, over a period of time are called biodegradable polymers. Example of biodegradable aliphatic polyester is PHBV (Poly-\u03b2-hydroxybutyrate-co-\u03b2-hydroxy Valerate).<\/p>\n<p>Question 19.<br \/>\nThe rate of a reaction becomes four times when the temperature changes from 293 K to 313 K. Calculate the energy of activation (E<sub>a<\/sub>) of the reaction assuming that it does not change with temperature. [3]\n[R = 8.314 J\/K mol<sup>-1<\/sup>, log 4 = 0.6021<br \/>\nAnswer:<br \/>\nGiven,<br \/>\nT<sub>1<\/sub> = 293K, T<sub>2<\/sub> = 313 K.<br \/>\nR = 8.314 JK<sup>-1<\/sup> Mol<sup>-1<\/sup><br \/>\nlog 4 = 0.6021<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572911721_6ed6029660_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q19\" width=\"274\" height=\"131\" \/><\/p>\n<p>Question 20.<br \/>\nWhat are the characteristics of the following colloids? Give one example of each. [3]\n(i) Multimolecular colloids<br \/>\n(ii) Lyophobic sols<br \/>\n(iii) Emulsions.<br \/>\nAnswer:<br \/>\n(i) On dissolution, a large number of atoms or molecules of a substance aggregate to form colloidal particles. This colloid is called a multimolecular colloid, e.g. Sulphur sol.<\/p>\n<p>(ii) The colloids in which there is no affinity between the particles of dispersed phase and dispersion medium are called lyophobic colloids. They are not stable, that is easily coagulated and irreversible. They are produced only by special methods, eg. AS<sub>2<\/sub>S<sub>3<\/sub> sol, Fe(OH)<sub>3<\/sub> sol.<\/p>\n<p>(iii) Emulsions are colloids in which both dispersed phase and dispersing medium are liquid and immiscible with each other eg. Milk, cod liver oil, etc.<\/p>\n<p>Question 21.<br \/>\nGive reasons for the following: [3]\n(i) When R is an alkyl group R<sub>3<\/sub>P = 0 exist but R<sub>3<\/sub>N = 0 doesn\u2019t.<br \/>\n(ii) PbCl<sub>4<\/sub> is more covalent than PbCl<sub>2<\/sub>.<br \/>\n(iii) N<sub>2<\/sub> is much less reactive at room temperature.<br \/>\nAnswer:<br \/>\n(i) Due to the absence of d-orbitals, N cannot form p\u03c0-d\u03c0 multiple bonds. Thus, it cannot expand its covalency beyond 4. In R<sub>3<\/sub>N = 0, N has covalency 5 so it does not exist. On the other hand, due to the presence of d-orbitals, P forms p\u03c0-d\u03c0 multiple bonds and expand its covalency beyond 4. In R<sub>3<\/sub>P = 0 covalency of P is 5 hence it exists.<\/p>\n<p>(ii) Because \u2018Pb\u2019 is in +4 oxidation state in PbCl<sub>4<\/sub> and has high charge\/size ratio than Pb<sup>2+<\/sup>. According to Fazan\u2019s rule, a higher charge on cation or anion makes compound more covalent, +4 state is more stable than +2 state. Hence PbCl<sub>4<\/sub> is more covalent than PbCl<sub>2<\/sub><\/p>\n<p>Question 22.<br \/>\nFor the complex [NiCl<sub>4<\/sub>]<sup>2-<\/sup>, write [3]\n(i) the IUPAC name<br \/>\n(ii) the hybridization type<br \/>\n(iii) the shape of the complex (Atomic no. of Ni = 28)<br \/>\nOR<br \/>\n\u2018What is meant by crystal field splitting energy? On the basis of crystal field theory, write the electronic configuration of d<sup>4<\/sup> in terms of t<sub>2g<\/sub> and e<sub>g<\/sub> in an octahedral field when<br \/>\n(i) \u2206<sub>0<\/sub> &gt; P<br \/>\n(ii) \u2206<sub>0<\/sub> &lt; P<br \/>\nAnswer:<br \/>\n(i) Tetrachloridonickelate (II) ion<br \/>\n(ii) sp<sup>3<\/sup> hybridisation<br \/>\n(iii) Tetrahedral shape.<br \/>\nOR<br \/>\nIn octahedral complexes, the d-orbitals split into two sets, one with two orbitals of high energy (t<sub>2g<\/sub>) and three orbitals with lower energy (e<sub>g<\/sub>). The difference in energy levels of these sets is the crystal field splitting energy.<\/p>\n<p>(i) When \u2206<sub>0<\/sub> &gt; P, an electronic configuration is t<sub>2g<\/sub><sup>4 <\/sup>e<sub>g<\/sub><sup>0<\/sup><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573062842_af98170e24_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q22\" width=\"120\" height=\"51\" \/><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573062962_68248e77dd_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q22.1\" width=\"168\" height=\"50\" \/><\/p>\n<p>(ii) When \u2206<sub>0<\/sub> &lt; P, electronic configuration is t<sup>3<\/sup><sub>2g<\/sub>e<sup>1<\/sup><sub>g<\/sub><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063052_9d61c6be97_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q22.2\" width=\"173\" height=\"84\" \/><\/p>\n<p>Question 23.<br \/>\nGive reasons for the following:<br \/>\n(i) Ethyl iodide undergoes S<sub>N<\/sub>2 reaction faster than ethyl bromide.<br \/>\n(ii) (\u00b1) 2-Butanol is optically inactive.<br \/>\n(iii) C-X bond length in halobenzene is smaller than C-X bond length in CH<sub>3<\/sub>-X.<br \/>\nAnswer:<br \/>\n(i) I<sup>\u2013<\/sup> ion is better-leaving group than Br<sup>\u2013<\/sup> ion, therefore, ethyl iodide reacts faster than ethyl bromide in an S<sub>N<\/sub>2 reaction.<\/p>\n<p>(ii) (+) 2-butanol is optically inactive because it is racemic mixture i.e. it has enantiomers in equal amount and hence they cancel each other\u2019s rotation of plane polarised light.<\/p>\n<p>(iii) In halobenzene, the halogen atom is attached to sp3 hybridized carbon while in CH<sub>3<\/sub>-X sp<sup>2<\/sup> hybridized carbon which is smaller in size than sp<sup>3<\/sup> hybridized carbon attached to the halogen. Therefore C-X bond in halobenzene is shorter than in CH<sub>3<\/sub>-X.<\/p>\n<p>Question 24.<br \/>\nComplete the following reactions: [3]\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063102_822c47d8e2_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q24\" width=\"318\" height=\"164\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063197_c56bb6092f_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q24.1\" width=\"378\" height=\"150\" \/><\/p>\n<p>Question 25.<br \/>\n(i) What class of drug is Ranitidine? [3]\n(ii) If the water contains dissolved Ca<sup>2+<\/sup> ions, out of soaps and synthetic detergents, which will you use for cleaning clothes?<br \/>\n(iii) Which of the following is an antiseptic?<br \/>\n0.2% phenol, 1% phenol<br \/>\nAnswer:<br \/>\n(i) Antacid.<\/p>\n<p>(ii) Soap gets precipitated in hard water hence it can\u2019t be used to wash clothes. On the other hand, synthetic detergents do not precipitate in hard water because its calcium salt is soluble in water. Therefore, it can be used to wash clothes in hard water.<\/p>\n<p>(iii) 0.2% phenol.<\/p>\n<p>Question 26.<br \/>\nCalculate the emf of the following cell at 25\u00b0C: [3]\nAg(s) | Ag<sup>+<\/sup>(10<sup>-3<\/sup>M) || Cu<sup>2+<\/sup>(10<sup>-1<\/sup>M) | Cu(s)<br \/>\nGiven E<sub>cell<\/sub>\u00b0 = +0.46V &amp; log<sub>10<\/sub>n = n.<br \/>\nGiven cell notation is incorrect correct cell formula is<br \/>\nCu<sup>2+<\/sup> (10<sup>-1<\/sup>M) | Cu(s) || Ag<sup>+<\/sup>(10<sup>-3<\/sup>M) | Ag(s)<br \/>\nAnswer:<br \/>\nAccording to Nernst equation,<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063252_902d3096d7_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q26\" width=\"248\" height=\"258\" \/><\/p>\n<p>Question 27.<br \/>\nShanti, a domestic helper of Mrs Anuradha, fainted while mopping the floor. Mrs Anuradha immediately took her to the nearby hospital where she was diagnosed to be severely \u2018anaemic\u2019. The doctor prescribed an iron rich diet and multivitamins supplement to her. Mrs Anuradha supported her financially to get the medicines. After a month, Shanti was diagnosed to be normal.<br \/>\n(i) What values are displayed by Mrs Anuradha?<br \/>\n(ii) Name the vitamin whose deficiency causes \u2018pernicious anaemia\u2019. [3]\n(iii) Give an example of a water-soluble vitamin.<br \/>\nAnswer:<br \/>\n(ii) Pernicious anaemia is caused due to deficiency of Vitamin B<sub>12<\/sub>.<br \/>\n(iii) Vitamin C and Vitamin B.<\/p>\n<p>Question 28.<br \/>\n(a) State Raoult\u2019s law for a solution containing volatile components. How does Raoult\u2019s law become a special case of Henry\u2019s law?<br \/>\n(b) 1.00 g of a non-electrolyte solute dissolved in 50 g of benzene lowered the freezing point of benzene by 0.40 K. Find the molar mass of the solute. (K<sub>f<\/sub> for benzene = 5.12 K kg\/ mol) [5]\nOR<br \/>\n(a) Define the following terms:<br \/>\n(i) Ideal solution<br \/>\n(ii) Azeotrope<br \/>\n(iii) Osmotic pressure.<br \/>\n(b) A solution of glucose (C<sub>6<\/sub>H<sub>12<\/sub>O<sub>6<\/sub>) in water is labelled as 10% by weight. What would be the molality of the solution?<br \/>\n(Molar mass of glucose = 180 g\/mol)<br \/>\nAnswer:<br \/>\n(a) Raoult\u2019s law states that the partial pressure of a vapour of a component in the solution is directly proportional to its mole fraction in the solution.<br \/>\nRaoult\u2019s law becomes a special case of Henry\u2019s law as it states that the partial pressure of a gas in the vapour phase is directly proportional to the mole fraction of the gas in the solution.<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912311_65b15b1ea0_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q28\" width=\"278\" height=\"87\" \/><br \/>\nOR<br \/>\n(a) (i) A solution that obeys Raoult\u2019s law overall ranges of temperature and concentration and shows no attractive forces between components, is called an ideal solution.<br \/>\n(ii) A liquid mixture which distils at a constant temperature without undergoing any change in its composition is called Azeotropes.<br \/>\n(iii) The minimum external pressure required to prevent osmosis is known as osmotic pressure.<\/p>\n<p>(b) Given:<br \/>\nMolecular Mass of Glucose (M<sub>B<\/sub>) = 180<br \/>\n% by wt. = (W<sub>B<\/sub>) = 10<br \/>\nMolality (m) = ?<br \/>\nWe know<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063322_cd3e7c42e3_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q28.1\" width=\"159\" height=\"167\" \/><\/p>\n<p>Question 29.<br \/>\n(a) Give reasons for the following: [5]\n(i) Mn<sup>3+<\/sup> is a good oxidising agent.<br \/>\n(ii) E\u00b0M<sup>2+<\/sup>\/M values are not regular for first-row transition metals (3d series).<br \/>\n(iii) Although \u2018F\u2019 is more electronegative than \u2018O\u2019, the highest Mn fluoride is MnF<sub>4<\/sub>, whereas the highest oxide is Mn<sub>2<\/sub>O<sub>7<\/sub>.<br \/>\n(b) Complete the following equations:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912341_da26cabfd9_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q29\" width=\"335\" height=\"35\" \/><br \/>\nOR<br \/>\n(a) Why do transition elements show variable oxidation states?<br \/>\n(i) Name the element showing the maximum number of oxidation states among the first series of transition metals from Sc (Z = 21) to Zn (Z = 30).<br \/>\n(ii) Name the element which shows only +3 oxidation state.<br \/>\n(b) What is lanthanoid contraction? Name an important alloy which contains some of the lanthanoid metals.<br \/>\nAnswer:<br \/>\n(i) Mn+3 has electronic configuration 3d<sup>4<\/sup> 4<sup>0<\/sup>. It gains one electron on reduction and become 3d<sup>5<\/sup>4<sup>0<\/sup> which is a half-filled stable configuration. Hence it is a good oxidizing agent.<\/p>\n<p>(ii) Due to extra stability of half and fully filled d-orbitals and variations in ionization energies E<sup>0<\/sup>M<sup>2+<\/sup>\/M values are not regular.<\/p>\n<p>(iii) Due to the ability of oxygen to form multiple bonds with metals and because oxygen stabilizes the highest oxidation state even more than fluorine.<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912346_b1521a74f8_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q29.1\" width=\"330\" height=\"72\" \/><br \/>\nOR<br \/>\n(a) Due to the presence of incompleted d-orbitals, transition elements show variable oxidation states.<br \/>\n(i) Manganese shows oxidation states from +2 to +7.<br \/>\n(ii) Scandium (Sc).<\/p>\n<p>(b) Lanthanide contraction refers to the steady and regular decrease in atomic size along the period from La<sup>3+<\/sup> to Lu<sup>3+<\/sup> eg. Misch metal alloy which contains 95% lanthanoids and 5% iron.<\/p>\n<p>Question 30.<br \/>\n(a) How will you convert the following: [5]\n(i) Propanone to Propan-2-ol<br \/>\n(ii) Ethanal to 2-hydroxy propanoic acid<br \/>\n(iii) Toluene to benzoic acid<br \/>\n(b) Give a simple chemical test to distinguish between:<br \/>\n(i) Pentan-2 -one and Pentan-3 -one<br \/>\n(ii) Ethanal and Propanal<br \/>\nOR<br \/>\n(a) Write the products of the following reactions:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063457_e71dc5f224_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q30\" width=\"283\" height=\"190\" \/><br \/>\n(b) Which acid of each pair shown here would you expect to be stronger?<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063522_c6b774d7f2_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q30.1\" width=\"330\" height=\"159\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063557_075ca3811c_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q30.2\" width=\"403\" height=\"423\" \/><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063592_eb4fc4da8b_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q30.3\" width=\"402\" height=\"487\" \/><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912556_406eac57da_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set I Q30.4\" width=\"383\" height=\"321\" \/><\/p>\n<p>(b) (i) F-CH<sub>2<\/sub>-COOH is a stronger add than Cl-CH<sub>2<\/sub>-COOH because F is more electronegative than Cl, so it will favour the release of H<sup>+<\/sup> ion faster by dragging electron density towards itself more as compared to Cl.<br \/>\n(ii) Acetic acid CH<sub>3<\/sub>COOH is a stronger acid than phenol. Acetic acid forms carboxylate ion and phenol forms phenoxide ion. Carboxylate ion is more stable than phenoxide ion due to resonance.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi_Set_II\"><\/span>CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set II<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Note: Except for the following questions, all the remaining questions have been asked in the previous set.<\/p>\n<p>Question 1.<br \/>\nWrite the structure of 2-amino toluene. [1]\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912601_f21fe610c8_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set II Q1\" width=\"120\" height=\"108\" \/><\/p>\n<p>Question 2.<br \/>\nWhich aerosol depletes ozone layer? [1]\nAnswer:<br \/>\nChlorofluorocarbons (CFCs) present in aerosols depletes the ozone layer.<\/p>\n<p><strong>Also Get:<\/strong><span style=\"color: #0000ff;\"> <strong>PDF&#8217;s of Sample Question Paper from CBSE Official website<\/strong><\/span><\/p>\n<p>Question 4.<br \/>\nEthanal is soluble in water. Why? [1]\nAnswer:<br \/>\nEthanal is soluble in water due to Hydrogen bonding.<\/p>\n<p>Question 5.<br \/>\nWrite the IUPAC name of the following compound: [1]\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912636_9e86e05f83_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set II Q5\" width=\"249\" height=\"63\" \/><br \/>\nAnswer:<br \/>\n2-Bromo-4-chloropentane.<\/p>\n<p>Question 7.<br \/>\nWrite the name of the linkage joining two amino acids. [1]\nAnswer:<br \/>\nPeptide linkage.<\/p>\n<p>Question 8.<br \/>\nGive one example of a condensation polymer. [1]\nAnswer:<br \/>\nDacron or Nylon-6, 6.<\/p>\n<p>Question 9.<br \/>\n(a) Why does the presence of an excess of lithium make LiCl crystals pink? [2]\n(b) A solid with cubic crystal is made of two elements P and Q Atoms of Q are at the comers of the cube and P at the body-centre. What is the formula of the compound?<\/p>\n<p>Question 14.<br \/>\nDraw the structures of the following molecules: [2]\n(i) XeF<sub>6<\/sub><br \/>\n(ii) H<sub>2<\/sub>S<sub>2<\/sub>O<sub>7<\/sub><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063737_93f957ba01_o.png\" alt=\"Class 12 Chemistry 2013 Outside Delhi Set II Q14\" width=\"179\" height=\"205\" \/><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912676_5542f5de64_o.png\" alt=\"Class 12 Chemistry 2013 Outside Delhi Set II Q14.1\" width=\"296\" height=\"161\" \/><\/p>\n<p>Question 18.<br \/>\nOutline the principles of refining of metals by the following methods: [2]\n<ol>\n<li>Zone refining<\/li>\n<li>Vapour phase refining<\/li>\n<\/ol>\n<p>Answer:<\/p>\n<ol>\n<li>This method is based on the principle that the impurities are more soluble in the molten state than in the solid-state of the metal.<\/li>\n<li>In this process, the metal is converted to its volatile compound, collected elsewhere and then decomposed to give pure metal.<\/li>\n<\/ol>\n<p>Question 19.<br \/>\nDefine the following terms giving an example of each: [2]\n(i) Associated colloids<br \/>\n(ii) Lyophilic sol<br \/>\n(iii) Adsorption.<br \/>\nAnswer:<br \/>\n(i) Associated colloids are colloidal substances which at low concentrations behave as normal electrolytes but at higher concentration, they aggregate to form colloids, eg. Soaps and detergents.<\/p>\n<p>(ii) Lyophilic sols are the colloids in which the particles of dispersed phase have a strong affinity for the dispersion medium. They are reversible in nature because on precipitation they can be easily converted back to colloidal form by adding dispersion medium, eg. Starch sol.<\/p>\n<p>(iii) The aggregation of a substance on the surface of a liquid or solid is known as adsorption eg. Adsorption of poisonous gases on charcoal.<\/p>\n<p>Question 22.<br \/>\nWrite the main products of the following reactions: [2]\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063942_7bf7de1665_o.png\" alt=\"Class 12 Chemistry 2013 Outside Delhi Set II Q22\" width=\"286\" height=\"176\" \/><br \/>\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572912736_e7676e369c_o.png\" alt=\"Class 12 Chemistry 2013 Outside Delhi Set II Q22.1\" width=\"300\" height=\"87\" \/><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063772_051b4f74b8_o.png\" alt=\" Class 12 Chemistry 2013 Outside Delhi Set II Q22.2\" width=\"393\" height=\"410\" \/><\/p>\n<p>Question 27.<br \/>\nGive reasons for the following: [3]\n(i) Oxygen is gas but sulphur is solid.<br \/>\n(ii) O<sub>3<\/sub> acts as a powerful oxidising agent.<br \/>\n(iii) BiH<sub>3<\/sub> is the strongest reducing agent amongst all the hydrides of Group 15 elements.<br \/>\nAnswer:<br \/>\n(i) Oxygen is smaller in size than sulphur. Due to small size, it can effectively form p\u03c0-p\u03c0 bonds and forms diatomic O<sub>2<\/sub> molecule. The intermolecular forces in oxygen are weak van der Waals forces, which causes it to exists as a gas. On the other hand, sulphur does not form strong S=S double bonds and exists as a puckered structure held together by covalent bonds and exists as a polyatomic molecule. So, it exists as solid.<\/p>\n<p>(ii) O<sub>3<\/sub> act as a powerful oxidising agent because it decomposes to give nascent oxygen.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"CBSE_Previous_Year_Question_Papers_Class_12_Chemistry_2013_Outside_Delhi_Set_III\"><\/span>CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set III<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Note: Except for the following questions, all the remaining questions have been asked in previous sets.<\/p>\n<p>Question 1.<br \/>\nWhat is especially observed when a beam of light is passed through a colloidal solution? [1]\nAnswer:<br \/>\nTyndall effect is observed due to the scattering of light.<\/p>\n<p>Question 2.<br \/>\nWhat is the basicity of H<sub>3<\/sub>PO<sub>3<\/sub> and why? [1]\n<p>Question 3.<br \/>\nWrite the IUPAC name of the following compound: [1]\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573063802_b4100bbaca_o.png\" alt=\" 12 Chemistry 2013 Outside Delhi Set III Q3\" width=\"82\" height=\"116\" \/><br \/>\nAnswer:<br \/>\n2,4-dichlorotoluene<\/p>\n<p>Question 8.<br \/>\nWrite the structure of prop-2-en-l-amine. [1]\nAnswer:<br \/>\nH<sub>2<\/sub>C = CH \u2013 CH<sub>2<\/sub> \u2013 NH<sub>2<\/sub><\/p>\n<p>Question 12.<br \/>\nDraw the structures of the following molecules:<br \/>\n(i) N<sub>2<\/sub>O<sub>5<\/sub><br \/>\n(ii) XeF<sub>2<\/sub> [2]\nAnswer:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572910901_c4c5cf0f70_o.png\" alt=\" Class 12 Chemistry 2013 Outside Delhi Set III Q12\" width=\"309\" height=\"163\" \/><br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573062152_988239b506_o.png\" alt=\"Class 12 Chemistry 2013 Outside Delhi Set III Q12.1\" width=\"206\" height=\"172\" \/><\/p>\n<p>Question 13.<br \/>\n(a) What change occurs when AgCl is doped with CdCl<sub>2<\/sub>?<br \/>\n(b) What type of semiconductor is produced when silicon is doped with boron? [2]\n<p>Question 18.<br \/>\nName the principal ore of aluminium. Explain the significance of leaching in extraction as aluminium. [2]\nAnswer:<br \/>\nBauxite (Al<sub>2<\/sub>O<sub>3<\/sub>.2H<sub>2<\/sub>O) is the principal ore of aluminium. The significance of leaching in the extraction of aluminium is to prepare pure alumina from the bauxite ore in the following steps:<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48572910781_de8f677159_o.png\" alt=\"Class 12 Chemistry 2013 Outside Delhi Set III Q18\" width=\"369\" height=\"128\" \/><\/p>\n<p>After filtration of impurities, sodium meta aluminate is neutralized by passing CO<sub>2<\/sub>.<br \/>\n<img loading=\"lazy\" class=\"aligncenter\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/48573061997_8aafd22160_o.png\" alt=\"CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Set III Q18.1\" width=\"391\" height=\"124\" \/><\/p>\n<p>Question 19.<br \/>\nDefine the following terms with an example in each case: [3]\n(i) Macromolecular Sol<br \/>\n(ii) Peptization<br \/>\n(iii) Emulsion.<br \/>\nAnswer:<br \/>\n(i) Macromolecular sol: They are molecules of large size having high molecular masses. Due to the long chain, the van der Waals forces are stronger. Eg. rubber, nylon, etc.<\/p>\n<p>(ii) Peptization: It is the process of converting a precipitate into colloidal solution by shaking it with dispersion medium in the presence of a small amount of electrolyte. E.g. A precipitate of Agl can be peptized by shaking with a dilute<br \/>\nsolution of silver nitrate.<\/p>\n<p>(iii) Emulsion: A type of colloidal solution in which both the dispersed phase and dispersion medium are liquid and are immiscible with each other is called emulsion. Ex. milk.<\/p>\n<p>Question 21.<br \/>\nGive reasons for the following: [3]\n(i) Though nitrogen exhibits a +5 oxidation state, it does not form pentahalide.<br \/>\n(ii) Electron gain enthalpy with a negative sign of fluorine is less than that of chlorine.<br \/>\n(iii) The two oxygen-oxygen bond lengths in ozone molecules are identical.<br \/>\nAnswer:<br \/>\n(ii) Due to small size, fluorine atom has high electronegativity and strong electron-electron repulsions in its compact 2p orbitals, its electron gain enthalpy is less than that of chlorine.<\/p>\n<p>(iii) The two oxygen bond lengths in ozone are identical due to resonance.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction: Class 12 Chemistry 2013 Outside Delhi CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi Time allowed: [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Class 12 Chemistry","_yoast_wpseo_title":"Class 12 Chemistry 2013 Outside Delhi CBSE Previous Year Questions","_yoast_wpseo_metadesc":"Get CBSE Previous Year Question Papers Class 12 Chemistry 2013 Outside Delhi. 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