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2 11 th STD. Time :.30 hrs QUARTERLY EXAMINATION CHEMISTRY Reg. No. Mrks : 70 Prt - I 6. How mny sub-shells re present in M-shell? 1. Answer ll questions () (b) 4. Choose nd write the orret nswer: () 3 (d) 1 7. Sttement I : Crystlline solids re nisotropi [15 1 = 15] Sttement II: Their physil properties re sme 1. Wht is the reltionship between moleulr in ll diretions. weight nd vpour density of gs? () Sttement I is orret () Moleulr weight = Vpour density (b) Moleulr weight = Vpour density (b) Sttement I is orret but II is not relevnt to sttement I () Moleulr weight = Vpourdensity () Sttement I nd II re is orret (d) Sttement I is inorret but sttement II is orret (d) Moleulr weight = Vpour density 8. The number of CsCl units per unit ell of sl. Whih of the following ontins mximum is number of toms? () one (b) four ().0g hydrogen (b).0g oxygen () two (d) six ().0g Nitrogen (d).0g methne 9. Mth the list I with List II nd selet the 3. Identify the formul of tinstone orret nswer using the ode given below the lists. () MnO (b) SnO () SnCl (d) ZnS List I List I 4. Highly pure metls re obtined by Boyle's Lw r1 M proess. A. = 1. r M1 () Zone refining B. PV = onstnt. Grhm's lw (b) Mond's Proess of diffusion () Eletrolyti refining C. (d) ll the bove V 3. Idel gs equltion 5. Consider the following sttements. T (i) The positive hrge of the nuleus is due D. PV = nrt 4. Chrles lw to neutrons. (ii) The totl number of nuleons is termed s mss number (A) of the tom. (iii) The number of protons in n tom is lled its tomi number (z) Whih of the following sttement(s) given A B C D () (b) () (d) Give unit of Vnderwll's onstnt '' bove is/re is orret? () lit mol 1 (b) lit mol () 1, nd 3 (b) only 1 () lit mol (d) tm lit mol () only 3 (d) nd Arrnge the follwing ompounds in their inresing order of ovlent hrter orders@surbooks.om Ph: / /

3 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers 393 licl, NCl, CCl, KCl, RbCl () RbCl > KCl > CsCl > NCl > licl (b) licl > CsCl > KCl > NCl > RbCl () licl > NCl > KCl > RbCl > CsCl (d) CsCl > RbCl > KCl > NCl > licl 1. Mth the list I with list II nd selet the orret nswer using the ode given below the lists. List I List I A BF 3 1. Tetrhedrl B NH 4. Othedrl C Bel 3. Trigonl plnr D SF 6 4. Liner () CH 3 -CH -CH -CH CH3 (b) CH3 C CH3 CH3 () CH3 -CH-CH -CH3 CH3 (d) polr bond 15. Type of hromtogrphy Thin lyer hromtogrphy pper Chromotogrphy Sttiony Phse Solid Y Moblie Phse X liquid The X nd Y re... () liquid, liquid () liquid, solid (b) solid, liquid (d) Gs, gs Prt - II Answer ny six questions. [6 = 1] 16. Wht is the mss in grms of hlorine tom, Cl? 17. Distinguish between ore nd minerl with suitble exmple? 18. Give the expeted nd tul onfigurtion for hromium (Cr) nd opper (Cu) 19. Clulte the Miller indies of (, 3b, ) rystl plnes. 0. Define Dlton's lw of prtil pressure. A B C D 1. Wht is hybridistion? () How does ethylene glyol ret with (b) terephthli id? () Give the ommon nd IUPAC nme for the (d) following ompounds. 13. The orret tention order mong the following: 4. Explin the method of seprting mphor (i) CH 3 NHCH 3 (ii) CH 3 CHO () Si S > > o > N > P from non-voltile impurities. (b) C > Si S > p > N > o Prt - III () C < Si S < p N < o (d) P < N < 0 < C< Si S 14. Selet the orret struture of Neopentne Note : 1. Answer ny six questions. Atlest two questions from eh setion should be nswered [6 3 = 18] Setion - A 5. Define oxidtion number nd lulte the oxidtion number of underlined elements in the following ompounds (i) Cr O (ii) HNO 3 6. Explin the method of onentrtion of Zin blend ore. 7. Define Aufbu priniple nd prove tht 4s orbitl hs less energy thn 3d orbitl. 8. How mny toms re there per unit ell in (i) Simple ube (ii) Body entred ube 9. Wht is known s Joule Thomson effet? Give the onditions for liqueftion of gses. 30. How is s nd p bond formed nd explin how is it formed in oxygen moleule? Among these bonds whih one is stronger. orders@surbooks.om Ph: / /

4 394 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers 31. Explin with reson the redution of overll retion is 54 kjmol. tetrhedrl bond ngle ( ) in mmoni 37. (i) Give the eletron dot representtion for nd wter moleules. PH 3 nd ethne. (ii) Write the differenes between ioni nd 3. Give the struturl formul of the following ovlent ompounds. ompounds. (i) -Butene (ii) Ethyl methyl ether (i) Wht re lled heteroyli ompounds? (iii) Propni id Give exmples. 33. Write short notes on extrtion with solvents. (ii) Write the differenes between eletrophili nd nuleophile. Prt - IV Note : Answer question number (i) Explin differenes types of Struturl ompulsorily nd nswer ny three isomerism with exmple. questions from the remining questions. (ii) Wht is indutive effet? [4 10 = 40] 34. (i) Define equivlent mss of n id. (i) Why should we need to purify n (ii) How will you determine equivlent orgni ompound? mss of n element by hloride method? (ii) Mention the onditions for the ompounds to be purified by stem (i) Write short notes on lintion. distilltion. (ii) How is opper purified by eletrolyti (iii) Wht is known s retention ftor (R f )? refining? 35. (i) Determine the numbers of eletrons in Answers the 1 st shell nd mention the vlues of its quntum numbers. (ii) Disuss the postultes of Bohr's model Prt - I of n tom. I. Answer ll the questions. 1. (). () 3. (b) 4. () 5. (b) (i) How do you the spings of the three 6. () 7. (b) 8. () 9. () 10. (d) plns (100) (101) nd (111) of simple 11. () 1. () 13. (b) 14. (b) 15.() ubi lttie (ii) Desribe the struture of sodium Prt - II hloride with net digrm. 36. Derive the ritil onstnts V C, P C nd T 16. Solution : C from Vnderwl's onstnts. Atomi weight of Cl = 35.5 mu \ Molr mss = 35.5g / mol (i) Clulte the lttie enthlpy of mg Br 35. 5g given tht the enthlpy of Mss of Cl tom = ) Sublimtion of Mg is kj mol ) Ionistion of Mg to Mg is + 187kJ/ \ Molr of Cl tom = g mol. 17. Ore: 3) Vporistion of Br (l) to Br (g) is 31kJ/ The minerl from whih metl n be mol. profitbly extrted is n ore. 4) Dissoition of Br (g) to Br is 193kJ/ Eg: Buxite. mol. Minerl: 5) Eletron given for Br - to Br is 331kJ/ The nturl mteril in whih the metl mol. or their ompounds our in the erth. 6) Stndrd enthlpy hnge, DH for the Eg. ly. orders@surbooks.om Ph: / /

5 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers Expeted onfigurtion x + 7 ( ) = x 14 Chromium : 1s, s, p 6, 3s, 3p 6, 3d 4, 4s x 14 = Copper : 1s, s, p 6, 3s, 3p 6, 3d 9, 4s x = b (ii) HNO 3 : 1 + x + 3 ( ) = interepts x = reiprols 6. ZnS Conentrted by Froth Flottion 3 Proess. 3 6 ler frtions Sulphide ore prtiles moistened by oil nd gngue prtiles moistened by Hene, Miller Indies re (36) wter. 0. Dlton's Lw of Prtil Pressure : Powdered ore + pine oil + wter stirred P = P 1 + P + P 3 by blowing ompressed ir. At onstnt temperture, the totl pressure Gngue prtile settle t bottom, ore exerted by the gseous mixture is equl to prtile stik to froth re removed, the sum of the individul pressures whih olleted nd llowed to subside. eh gs would exert if it oupies the sme 7. In the ground stte of the toms, the orbitls volume of mixture fully by itself. re filled in order of their inresing energies 1. Orbitls of nerly sme energy ombine to Order of filling orbitls is 1s, s, p, 3s, 3p, form n equl number of equivlent energy 4s, 3d, 4p, 5s,... new orbitl with properties of their Own. 8. Cubi System No. of Atoms. n(ho CH CH OH) + n(hooc COOH) SC Terephthli id (Ethylene glyol) = 1 O O BCC 8 O CH ( CH O C C ) 1 n +nho 8 + 1= Terylene FCC = 4 3. S.No. Common IUPAC Nme Nme Dimethyl N-methyl mino (i) mine methne (ii) Aetldehyde Ethnl 4. Certin solid substne when heted psses diretly to vpour stte without melting, the vpours on ooling give bk the solid substne. Eg. Cmphor, Nphthlene. 5. Oxidtion Number: It is defined s the residul hrge whih its tom hs when ll other toms from the moleule re removed s ions. (i) Cr O 7 : 9. The phenomenon of produing lowering of temperture when gs expnds dibtilly from region of high pressure into low pressure is known s Joule Thomson effet. Condition for liqueftion of gs (i) Bsed on T C vlues NH 3, Cl, SO (ii) Bsed on Joule - H Thomson effet, O, N (iii) Adibti He demgnetistion orders@surbooks.om Ph: / /

6 396 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers 30. s Bond: Formed by liner overlp of s s, s p or p p orbitl. Strong bond. p Bond: Formed by sidewise overlp of p orbitls. Wek bond. O moleule hs one σ bond nd one π bond p p y y + p z p z 33. (i) Orgni substne shken with suitble orgni solvent, where orgni nd queous lyers re formed. (ii) Orgni lyer is seprted using seprting funnel nd queous lyer is distilled inorder to remove impurities. 34. (i) No of repleble hydrogen toms present in moleule of n id is referred to its bsiity. Equivlent Mss of n id }= Molr mss of the id No.of repleble hydrogen Eg. Bsiity of H SO 4 = O tom O tom Eq. mss of }= MolrmssofHSO 4 H SO 4 ; = 98 = 49 σ \ Eq. mss of H π p y -p y lterl SO 4 = 9 σ (ii) The equivlent mss of the elements whih O = π O moleule overlp(π type) redily forms hlorides re determined by hloride method. Silver treted with dil.hno3 forms p z -p z lterl AgNO 3 overlp(π type) AgNo 3 is treted wil Hl forms 31. NH 3 : 3bp nd 1 lp of eletrons, (pyrmidl). Agl is dried f weight f eq. mss of metl is lulted s follows. (i) The three NH bonding pirs re pushed Mss of metl = w loser beuse of lp-bp repulsion nd 1 g Mss of the HNH ngle is redued from 109 8' metl hloride = w to 107. g Mss of hlorine = (w (ii) H O: bp nd lp of eletrons (tetrhedrl). w 1 )g 35.46g of hlorine ombine with Sine lp - bp repulsion is greter thn w1 lp-bp repulsion, the HOH ngle is g of metl redued from to (w -w 1) N. O. H 107 H H H H (i) Clintion: Ore metl oxide. 3. (i) CH 3 CH = CH CH Ore is heted in bsene of ir. 3 (ii) CH 3 O CH CH 3 (iii) CH 3 CH COOH. During lintion, Moisture is removed + Gses re expelled + vltile impurities re removed Mss beomes porous. Therml deomposition ours. CCO 3 CO + CO + (ii) Eletrolyti Refining:- Cthode : Pure opper Anode : Impure opper orders@surbooks.om Ph: / /

7 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers 397 Eletrolyte : Copper sulphte energy level, it rdites sme mount of On pssing urrent pure opper settles on energy in the form of rdition. thode nd impurities settle down s node mud. 35. (i) dhel = h + k + l (i) No. of eletron is I shell (K-shell) = n = 1, l = 0, m = 0, s = + ½ d( 100) n = 1, l = 0, m = 0, s = ½ d( 110) (ii) The importnt postultes of Bohr theory of tom re: The eletrons revolve round the nuleus d( 111) = only in ertin seleted irulr pths lled orbits. These orbits re ssoited with definite energies nd re lled energy shells or energy levels or quntum levels. d (100) : d (110) : d (111) = 1 : 1 3 = 1 : : These re numbered s 1,, 3, 4.. et. (strting from the nuleus) re designted (ii) NCl onsist of FCC lttie. s K, L, M, N.et. As long s n eletron remins in prtiulr orbit, it does not lose or gin energy. This mens tht energy of n eletron in prtiulr pth remins onstnt. Therefore, these orbits re lso lled sttionry sttes. - Cl Only those orbits re permitted in whih - N ngulr momentum of the eletron is whole number multiple of h/p, where h Lttie mde of ions so lled ioni is Plnk s onstnt. An eletron moving in lttie. irulr orbit hs n ngulr momentum No. of N + f l ions = 13 & 14 equl to mνr where m is the mss of the 1 N eletron nd ν, the ngulr momentum, mνr surrounded by 6 l ions nd 1l is whole number multiple of h/p i.e., surrounded by 6 N + ons - 6 : 6 o-ordintion. mνr = nh/p where n = 1,, 3,... No. of N In other words, ngulr veloity of eletrons ions : = 4 in n tom is quntised. No. of Cl ions = = 4 8 If n eletron jumps from one sttionry No. of NCl units per unit ell is 4. stte to nother, it will bsorb or emit 36. Derivtion of V C, P C nd T C : rdition of definite frequeny giving Let us derive the vlues of ritil onstnt spetrl line of tht frequeny whih T depends upon the initil nd finl levels. (ritil temperture), V (ritil volume) nd P When n eletron jumps bk to the lower (ritil pressure) in terms orders@surbooks.om Ph: / /

8 398 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers of the Vnderwl s onstnts nd b. The Vnderwl s eqution is given by P + V b RT V ( ) =...(1) Expnding this eqution PV V Pb b + RT = 0...() V Multiplying by V P V P PV V Pb b + RT V = 0 V + V 3 b RTV bv = 0...(3) P P P Rerrnging this eqution in the powers of V 3 RT V b P V + b V 0 P + =...(4) =...(13) 7b P P substituting the vlue of V nd P in For this ubi eqution of V, three roots eqution (9) (vlues of V ) re possible. At the ritil point, the three vlues of V beome RT 3 3b = b + 7b identil nd is equl to the ritil volume (V ). 9b b = RT 7b Therefore V = V t T \ (V V ) = 0...(5) 8b = RT 7b \ (V V ) 3 = 0...(6) T upon expnding this eqution = 8...(14) 7Rb V 3 3 V V 3 + 3V V V = 0...(7) This eqution is identil with the ubi eqution derived from Vnderwl s (i) H 6 for Mg + + Br MgBr =? (g) (g) (s) eqution if we substitute T by T nd P by 6 H = H 1 + H + H 3 + H 4 + H 5 + H 6 P. 54 kj mol 1 = (331) 3 RT V b + H 6 ) kj mol 1 V + b V 0 P + =...(8) H P P 6 = 41 kj mol 1 (ii) Hess s lw sttes tht the enthlpy hnge Equting the powers of V from eqution (7) of retion is the sme t onstnt RT 3VV = + b P V volume nd pressure whether it tkes ple in single or multiple steps s 3V 3V RT = b +...(9) P =...(10) P b V 3 =...(11) P 3 V 3V b P =. ; P V b 3 = or V = 3b...(1) Substituting V = 3b in eqution (11) (3b) 3 = b P 7b 3 = b orders@surbooks.om Ph: / / P

9 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers 399 long s the initil retnts nd the finl (ii) produts remin the sme. Eletrophiles Nuleophiles 37. H Eletron defiient Eletron rik (i) P + 3 H H P H P H Ctions Anions H PH H Lewis ids Lewis bses H H Aept eletrons Donte eletrons H H Attk eletron ttk eletron H C C H H C C H rih site defiient site H H H H ethne 38. (ii) (i) Chin Isomerism: Covlent Ioni ompounds Sme moleulr formul but different ompounds rbon skeleton They re formed by They re formed by CH 3 CH CH CH 3 &CH3 -CH-CH3 mutul shring of omplete trnsfer n-butne eletrons. of eletrons. CH3 They exist s They exist s ions isobutne neutrl moleules (tion & nion) Position Isomerism: They do not They re poor Sme moleulr formul, rbon skeleton ondut eletriity ondutors of nd funtionl group, but differ in the eletriity in solid position of funtionl group. stte but beome CH good ondutors in 3 CH CH OH & CH3 -CH-CH3 1-Propnol solution. OH OH They posses low They posses high -Propnol melting nd boiling melting & boiling points points. Funtionl Isomerism: Eg. CCl 4. Eg. NCl. Sme moleulr formul, but different They re non-polr They re onsidered funtionl group. & hene soluble in s polr nd hene CH 3 CH OH & CH3 -O-CH3 non-polr solvents. soluble in wter ethnol dimethyl ether (polr solvent) (ii) Indutive Effet : If ovlent bond is formed by two toms differing muh in eletronegtivity then (i) Heteroyli Compounds: the bond is sid to be polrised. Ring toms re mde up of hetero toms The eletron pir shifts towrds the more like N, O & S in ddition to rbon toms re lled heteroyli ompounds. eletronegtive tom resulting in the origin of frtionl hrges on the toms.. Eg: N Pyrole Ḣ orders@surbooks.om Ph: / /

10 400 Sur s +1 Std - Chemistry Qurterly 017 Question Ppers (i) Need for Purifition: Orgni ompounds from nturl soures nd those prepred from lbortory ontin impurities nd mny other ompounds ssoited with it. Hene inorder to investigte the struture nd properties, the purifition of orgni ompound beomes essientils. (ii) Conditions for stem distilltion: It should not deompose t the stem temperture. It should hve firly high vpour pressure t 373K. It should be insoluble in wter. The impurities present should be nonvoltile. (iii) The reltive bsorption of eh omponent of the mixture is expressed in terms of its rentention ftor (R f ). Distne moved by the substne from bse line( x) R f = Distne moved by the solvent from bse line( y) orders@surbooks.om Ph: / /

11 Clik Here : 11 th Std(New Pttern) AlSubjetsGuides & QuestionPperswithAnswer It'sonlySmple- ForCompleteGuideClikHere Clik Here : w.trbtnps.om/017/09/11th-qurterly-exm-question-pper-nd-nswer-keys-downlod-0

Chapter 4rth LIQUIDS AND SOLIDS MCQs

Chapter 4rth LIQUIDS AND SOLIDS MCQs Chpter 4rth LIQUIDS AND SOLIDS MCQs Q.1 Ioni solis re hrterize y () low melting points () goo onutivity in soli stte () high vpour pressure () soluility in polr solvents Q.2 Amorphous solis. () hve shrp