—~aageeene NATION, Om AL PUBLIC ScHOE CHEMISTRY (043) Max. Marks: 70 No. of pages: 6 Sta: XI Timeanwee saris «wih internal choi vesions crying | mark each carrying 2 marks eat 3 marks each General! ‘i i Read en FHM on ini UES P ice a 2 Te owe sri multiple : is of 5 very show answer questions SECTIONB i erro sexs 0f 7st aT questions carrying «SECTION onsists oF 2 628° ‘pased questions Cay eanssts of 3108 answer {)SECTION ) All questions a8 compulry- J) use of ag ables amd raeutatas isnot allowed SECTION A me conect answer ach question carries Imark “The following questions a multiple pans no internal choice in tis $0100 ip baswesn pad Ke WRAL WSS he value of Bn for 1 We know the relations! 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Withietelp of adi expan pote ees. sion, The folowing 25h th die yes of system in harmonics “uid he gop number al psn uber of deen wih 29 Oe re yl fede wih omc vm! 118 an 1S 2 9 dp mea 0 moles ve distor traedral, bond a ar aro ay expan why Bex mole ds m1 eS : ee ne (O ‘other atom. questions ate ver? oat 1069K Calculate oes of ammonia formes. jon of electors Using questions a oy mic manber 52.5, V6 leon waters les aon CHEMifn \ y \ \ , ai Rx’ 7 \ Xl a 0 sl be bo ‘ \ 2 ston. re the visu ort a slages js, Asserion A) dont mle ea : lise 2 eason (AH ede to overcome ne fm tones (| om tne ‘OS y b> pest nator eaters the electron ot i 16, seni SH i gn eee 2 cat esl clone, | se CTION B ‘ei nl ‘The following ques ear ar ea, ccarty 2! Mace 5 5, ‘ n ra mig cu eo! resin om" Kis 3 75x10%a" 106 tee andl yg rio Fh n 8 Li maser saci "0 hove aug asigeseo SD no eftert 19. sin esd ele OR spine late’ oe cy epee pri Mas ofN-14, #10 21 2 Committ main be 24 SH pecirvaon reer il daa Syste’ Urey PS section Tsesinotin esi TON pein Tents mo ame ope 3 se kipeta caging en 1b punters erm oo 5,16 emit pr ure ee ith A M fume 18 308118 Ml ol ort eee with a0 utr tala bond angen wae 24 a)Fnd te 00P by Wet team 152) Along gamers of NIL and HHO mee hag tf arson Diss na rd my xn wy x ice dos aka ©) Caleulate the bond order of O:2"and eyplain is maynetie behaviour or a) Show the energy level diagram of No molecule bb) The equatorial and axial bond lengths of PCI; are not equal. Comment ©) Calculate the bond order of Hitand explain its magnetic behas out 26.) Classify the following species into Lewis acids and Lewis bases 1. BCI 6 Ppt js ae concentration of hydrogen ion a sample sot drinks 3 8x107™, wh 8-058) ) WL as pH? number method i Ft fic mediuen) by onde 27. Balanee the followin NOs + H20 Gin ac! on Cu + HNO: > Cu(NOo? electron method! o> ret + etn acidic median) PY Has aie Fe? #Cn0 > Fe ‘om acid ° spas or wore ome OY HOE wi 1394) of wor 2 re ee aca ot te RoR TEIUK | OO ON ction 2A I Oe Be VSB OS ONE Or, SECTION D questions. Fach question has an internal choice and caries 4 stions that follow. ‘The following questions are case-based (1142) marks each. Read the passage carefully and answer the ques 29. Answer the following questions. Hydrocarbons are compounds of hydrogen and carbon only. These are obtained from petroleum, natural eas and coal. Methane, ethane, acetylene and benzene are examples of hydrocarbons. Saturated Indrocarbons undergo free radical substitution reactions whereas unsaturated hydrocarbons undeiso aigition reactions. Aromatic hydrocarbons like benzene undergo electrophilic substitution reaction Ths stability of intermediates like free radicals, carbocations, carbanions are influenced by inductive and resonance effect. 1a) Convert Benzene to Chlorobenzene ) Discuss stability of carbanion ‘)Why does benzene undergo ele with difficulty? d)Give one example of Wurtz reac .ctrophilic substitution reaction easily and nucleophilic substitutions tion. OR 4)Show any one method of preparation of alkyne atoms or ions. Covalent 30. Chemical bond is the attractive force which holds the constituting; particles like f electrons from one bond is formed by sharing of electrons whereas ionic bond is Formed by transfer o Bonds are formed 0 as to altain stability. Bond order is number of bonds between two NPS.ITPL-2023/24/72.CHEM: ‘ener. Shape of 1 wles 15 decided bs NSEPR theory Smaller the cation. bi , im ‘be the polanting power ang more will be the tendency to form covalent bond Shatin and Ge eas tt mary and bunds ae se # ord ni 9 cen. ce cE «90a ad ame the shape of CHF based on VSEPR theoyy wget the anion, more will Pan s Dr mae: hag fe. 7 srcnione Te flowing aan are enganer pe ary SHH xh questo fotermal ei 3.3) Explain eons th es ath ely 0. 1) Whitt he fllonmag comport ag wom ncoringo Hoch rule Give sso che presence of anid group mas the Benzene sing less reactive in comparison 10 he unsybioted benzene ring Explain, oR 4) Write he IUPAC names ofthe prods ete by ozs of he ¥en compound (CHb.CH-CH-CH ty Suggest route othe preparatin of niobenzene si fom setyens ©) Classify the following rection in ofthe reaction SPS CHACHBr + HS’ > CHsCHSH vi Wha thosenuonship bween he lowing pi of structure” Are hey srt somes OF resonance contributors. Give 380 (CHsCH:COCH,CH and CHCH:CHCOCHS 32. a) Differentiate between homolytic cleavage and heterotic cleavage by Explain Inductive effect. Arrange the following in the increasing order. Give reason. y CICH,COOH, ChCCOOH, ChCHCOOH 6) Explain why alky! groups act as eletron donors when attached to an-system 2 OR 4) Arrange the following i, -NOz, -COOH, -F, -CN, -I, in increasing order of + effect 1i (CH3).C-, D- (CHs}:CH, CHs-, CHsCHa- in decreasing order of +1 effet. Y ay) et ec en ae NPS ITPL-202388/T2-C \ Wapy Give me bY ae 7 : oe a aon Oye 33. a) Draw the resonance structures for aniline, ') How will you convert the following? 1. Benzene to cyclohexane ii. Ethyne to benzene tii, Phenol to benzene : seen etnestinay % ae 34 Ee Ney ‘e ——9Fe LY L ak re "h Ser 5 aly » ‘ SPY ES OY yg +H 0 kis 860 ate "ye Beviof ——-s GN adn a + tout Me 'Sty,o1 _ cy i - WX