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CBSE Chemistry 2017 Board Questions

Students can also check the solved 2017 Chemistry board papers for both region Delhi and ALL INDIA<br>https://www.zigya.com/blog/cbse-class-12-chemistry-solved-board-paper-delhi-india/

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CBSE Chemistry 2017 Board Questions

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  1. CBSE Chemistry 2017 Board Questions www.zigya.com

  2. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. Short AnswerType Write the formula of an oxo-anion of Manganese (Mn) in which it shows the oxidation state equal to its groupnumber. Answer For a reaction R → P, half-life (t1/2) is observed to be independent of the initial concentration of reactants. What is the order ofreaction? Answer Write one similarity between Physisorption andChemisorption? Answer Complete the following reactions : NH3 + 3Cl2(excess)→ Answer Complete the following reactions : XeF6 + 2H2O→ Answer What happens when (NH4)2Cr2O7 isheated? Answer What happens when H3PO3 isheated? Answer Define the following terms: Colligativeproperties Answer Define the following terms: Molality(m) Answer Draw the structures of the following: Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  3. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. H2S2O7 Answer Draw the structures of the following : XeF6 Answer Calculatethedegreeofdissociation(a)ofaceticacidifitsmolarconductivity(Λ)is39.05S cm2mol–1. m Givenλo = 349.6 S cm2 mol–1andλo = 40.9 S cm2 mol–1 (H+) (CH3COO–) Answer A 10% solution (by mass) of sucrose in water has the freezing point of 269.15 K.Calculate the freezing point of10%glucoseinwateriffreezingpointofpurewateris273.15K. Given:(Molarmassofsucrose=342gmol–1)(Molarmassofglucose=180gmol–1) Answer Calculate the mass of Ag deposited at cathode when a current of 2 amperes was passed through a solution of AgNO3 for 15minutes. (Given : Molar mass of Ag = 108 g mol–1 1F = 96500 Cmol–1) Answer Define fuelcell. Answer What type of isomerism is shown by the complex [Co(NH3)6][Cr(CN)6]? Answer Why a solution of [Ni(H O) ]2+ is green while a solution of [Ni(CN) ]2– is colourless? (At. no. of Ni =28) 2 6 4 Answer Write the IUPAC name of the following complex :[Co(NH3)5(CO3)]Cl. Answer Write one difference in each of the following : Lyophobic sol and Lyophilicsol Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  4. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. Answer Write one difference in each of the following: Solution andColloid Answer Write one difference in each of the following : Homogeneous catalysis and Heterogeneouscatalysis Answer Following data are obtained for the reaction : N2O5 → 2NO2 +½O2 t/s 300 600 0 –1 –2 –2 –2 [N2O5]/mol L 1.6 × 10 0.8 × 10 0.4 ×10 Show that it follows first orderreaction. Calculate thehalf-life. (Given log 2 = 0.3010 log 4 =0.6021) Answer Writetheprincipleofthemethodusedfortherefiningofgermanium. Answer OutofPbSandPbCO3(oresoflead),whichoneisconcentratedbyfrothflotationprocesspreferably? Answer Answer Givereasons: Thermal stability decreases from H2O toH2Te. Answer Givereasons: Fluorideionhashigherhydrationenthalpythanchlorideion. Answer Givereasons: Nitrogen does not formpentahalide. Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  5. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. Answer Account for the following: Transition metals form large number of complexcompounds. Answer Account for the following: The lowest oxide of transition metal is basic whereas the highest oxide is amphoteric oracidic. Answer Account for the following: E° value for the Mn3+/Mn2+ couple is highly positive (+1.57 V) ascompared to Cr3+/Cr2+. Answer Writeonesimilarityandonedifferencebetweenthechemistryoflanthanoidandactinoidelements. Answer Howisthevariabilityinoxidationstatesoftransitionmetalsdifferentfromthatofthep-blockelements? Answer OutofCu+andCu2+,whichionisunstableinaqueoussolutionandwhy? Answer The Orange colour of Cr O 2– ion changes to yellow when treated withan 27 alkali. Why? Answer Chemistry of actinoids is complicated as compared to lanthanoids. Give tworeasons. Answer An element has atomic mass 93 g mol–1 and density 11.5 g cm–3. If the edge thelengthofitsunitcellis300pm,identifythetypeofunitcell. Answer Writeanytwodifferencesbetweenamorphoussolidsandcrystallinesolids. Answer Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  6. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. 39.Calculatethenumberofunitcellsin8.1gofaluminiumifitcrystallizesina f.c.c. structure. (Atomic mass of Al = 27 gmol–1) Answer Give reasons: In stoichiometric defects, NaCl exhibits Schottky defect and not Frenkel defect. Answer Give reasons: SiliconondopingwithPhosphorusformsthen-typesemiconductor. Answer Givereason: Ferrimagnetic substances show better magnetism than antiferromagnetic substances. Answer Write IUPAC name of the following compound : (CH3CH2)2NCH3 Answer Write the structure of1-Bromo-4-chlorobut-2-ene. Answer Write the equations involved in the following reactions : Wolff-Kishnerreduction Answer Write the equations involved in the following reactions : Etardreaction Answer Following compounds are given to you: 2-Bromopentane, 2-Bromo-2-methylbutane,1-Bromopentane Write the compound which is most reactive towards SN2reaction. Write the compound which is opticallyactive. Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  7. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. (iii)Writethecompoundwhichismostreactivetowardsb-eliminationreaction. Answer 48.Write structures of compounds A, B and C in each of the following reactions Answer 49. WritestructuresofcompoundsA,BandC ineachofthefollowingreactions Answer Do the following conversions in not more than two steps : Benzoic acid tobenzaldehyde Answer Do the following conversions in not more than two steps : Ethyl benzene to Benzoicacid Answer Do the following conversions in not more than two steps : Propanone toPropene Answer Write the structures of the monomers used for getting the following polymers: Dacron Answer Write the structures of the monomers used for getting the following polymers: Melamine – formaldehydepolymer Answer Write the structures of the monomers used for getting the following polymers: Buna-N Answer Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  8. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. • Define the following: • Anionicdetergents • Answer • Define the following : Broad spectrumantibiotics • Answer • Define the following : Antiseptic • Answer • Givereasons: • Acetylation of aniline reduces its activationeffect. • Answer • Give reasons: • CH3NH2 is more basic thanC6H5NH2. • Answer • Give reasons: • Although –NH2 is o/p directing group, yet aniline on nitration gives a significant amount ofm-nitroaniline. • Answer • After watching a programme on TV about the presence of carcinogens(cancercausing • agents) Potassium bromate and Potassium iodate in bread and other bakery products, Ritu a class XII student decided to aware others about the adverse effects of these carcinogens in foods. She consulted the school principal and requested him to instruct canteen contractor to stop selling sandwiches, pizza, burgers and other bakery products to the students. Principal took an immediate action and instructed the canteen contractor to replace the bakery products with some proteins and vitamins rich food like fruits, salads, sprouts etc. The decision was welcomed by the parents andstudents. • Afterreadingtheabovepassage,answerthefollowingquestions: • Whatarethevalues(atleasttwo)displayedbyRitu? • Which polysaccharide component of carbohydrates is commonly present inbread? • Writethetwotypesofsecondarystructureofproteins. • Give two examples of water solublevitamins. Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  9. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. Answer 63. Write the product(s) in the followingreactions: Answer 64. Write the product(s) in the followingreactions: Answer 65. Write the product(s) in the followingreactions: Answer Give simple chemical tests to distinguish between the following pairs of compounds: Ethanol andPhenol Answer Give simple chemical tests to distinguish between the following pairs of compounds: Propanol and2-methylpropan-2-ol Answer Write the formula of reagents used in the following reactions : Bromination of phenol to2,4,6-tribromophenol Answer Write the formula of reagents used in the following reactions : Hydroborationofpropeneandthenoxidationtopropanol. Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

  10. Chemistry CBSE2017 ExamYear 2017 Study, Assignments, Solved Previous Year Papers . Questions and Answers. FreeForever. Answer Arrange the following compound groups in the increasing order of their property indicated : p-nitrophenol, ethanol, phenol (acidiccharacter) Answer Arrange the following compound groups in the increasing order of their property indicated : Propanol, Propane, Propanal (boilingpoint) Answer Writethemechanism(usingcurvedarrownotation)ofthefollowingreaction: Answer Like. Share. Bookmark. Download. Make Notes. Print - Your Favourite Questions. Joinwww.zigya.com

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