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CBSE Class 12 Board Exam 2019 : Chemistry (Series 5)

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SET-1 H$moS> Z . Series BVM/5 Code No. amob Z . 56/5/1 narjmWu H$moS >H$mo C ma-nwp VH$m Ho$ _wI-n >na Ad ` {bIo & Roll No. Candidates must write the Code on the title page of the answer-book. H $n`m Om M H$a b| {H$ Bg Z-n _o _w{ V n > 15 h & Z-n _| Xm{hZo hmW H$s Amoa {XE JE H$moS >Z ~a H$mo N>m C ma-nwp VH$m Ho$ _wI-n > na {bI| & H $n`m Om M H$a b| {H$ Bg Z-n _| >27 Z h & H $n`m Z H$m C ma {bIZm ew $ H$aZo go nhbo, Z H$m H $_m H$ Ad ` {bI| & Bg Z-n H$mo n T>Zo Ho$ {bE 15 {_ZQ >H$m g_` {X`m J`m h & Z-n H$m {dVaU nydm _| 10.15 ~Oo {H$`m OmEJm & 10.15 ~Oo go 10.30 ~Oo VH$ N>m Ho$db Z-n H$mo n T>|Jo Am a Bg Ad{Y Ho$ Xm amZ do C ma-nwp VH$m na H$moB C ma Zht {bI|Jo & Please check that this question paper contains 15 printed pages. Code number given on the right hand side of the question paper should be written on the title page of the answer-book by the candidate. Please check that this question paper contains 27 questions. Please write down the Serial Number of the question before attempting it. 15 minute time has been allotted to read this question paper. The question paper will be distributed at 10.15 a.m. From 10.15 a.m. to 10.30 a.m., the students will read the question paper only and will not write any answer on the answer-book during this period. agm`Z {dkmZ (g mp VH$) CHEMISTRY (Theory) {ZYm [aV g_` : 3 K Q>o A{YH$V_ A H$ : 70 Time allowed : 3 hours 56/5/1 Maximum Marks : 70 1 P.T.O. gm_m ` {ZX}e : (i) g^r Z A{Zdm` h & (ii) I S> A : Z g `m 1 go 5 VH$ A{V bKw-C mar` Z h Am a `oH$ Z Ho$ {bE 1 A H$ h & (iii) I S> ~ : Z g `m 6 go 12 VH$ bKw-C mar` Z h Am a `oH$ Z Ho$ {bE 2 A H$ h & (iv) I S> g : Z g `m 13 go 24 VH$ ^r bKw-C mar` Z h Am a `oH$ Z Ho$ {bE 3 A H$ h & (v) I S> X : Z g `m 25 go 27 VH$ XrK -C mar` Z h Am a `oH$ Z Ho$ {bE 5 A H$ h & (vi) Z n _| g_J {dH$ n Zht {X`m J`m h & {\$a ^r EH$ A H$ dmbo Xmo Zm| _|, Xmo A H$m| dmbo Xmo Zmo _|, VrZ A H$m| dmbo Mma Zm| _| VWm nm M A H$m| dmbo VrZm| Zm| _| {dH$ n {X`m J`m h & Eogo g^r Zm| _| go AmnH$mo EH$ hr {dH$ n H$m C ma XoZm h & (vii) `{X Amd `H$Vm hmo, Vmo Amn bKwJUH$s` gma{U`m _m J gH$Vo h & H $ Hw$boQ>am| Ho$ `moJ H$s AZw_{V Zht h & General Instructions : (i) All questions are compulsory. (ii) Section A : Questions number 1 to 5 are very short answer questions and carry 1 mark each. (iii) Section B : Questions number 6 to 12 are short answer questions and carry 2 marks each. (iv) Section C : Questions number 13 to 24 are also short answer questions and carry 3 marks each. (v) Section D : Questions number 25 to 27 are long answer questions and carry 5 marks each. (vi) There is no overall choice. However, an internal choice has been provided in two questions of one mark, two questions of two marks, four questions of three marks and all the three questions of five marks weightage. You have to attempt only one of the choices in such questions. (vii) Use of log tables, if necessary. Use of calculators is not allowed. 56/5/1 2 I S> A SECTION A 1. H$moB KZr` R>mog A Am a B Xmo V dm| go {Z{_ V h & V d A go ccp ~ZVm h O~{H$ V d Ho$ na_mUw 1/3 MVw \$bH$s` [a{ $`m| H$mo ^aVo h & R>mog H$m gy `m h ? B 1 A cube solid is made up of two elements A and B. Element A forms ccp while atoms of element B occupy one-third of the tetrahedral voids. What is the formula of the solid ? 2. ? Amn `moJembm _| Amg}{ZH$ g \$mBS> gm b H$m {daMZ H $go H$a|Jo 1 AWdm 1 {df_m Jr C oaU H$m EH$ CXmhaU Xr{OE & How will you prepare arsenic sulphide sol in the lab ? OR Give an example of heterogeneous catalysis. 3. HCN Ho$ gmW A{^{H $`m Ho$ {V h & `m| ? CH3COCH3 H$s Anojm CH3CHO A{YH$ {H $`merb 1 CH3CHO is more reactive than CH3COCH3 towards reaction with HCN. Why ? 4. {H$gr Eop H$b h bmBS> Ho$ g_J A_moZr-AnKQ>Z Ho$ C nmX `m h ? 1 What are the products of exhaustive ammonolysis of an alkyl halide ? 5. [Co(NH3)5Cl]SO4 g Hw$b mam {H$g H$ma H$s g_md`dVm Xem B OmVr h ? AWdm {Z Z{b{IV H$mo {H $ Q>b jo {dnmQ>Z D$Om Ho$ ~ T>Vo H $_ _| `dp WV H$s{OE 1 : 1 [Cr(CN)6]3 , [Cr(NH3)6]3+, [CrCl6]3 What type of isomerism is shown by complex [Co(NH3)5Cl]SO4 ? OR Arrange the following in increasing order of crystal field splitting energy : [Cr(CN)6]3 , [Cr(NH3)6]3+, [CrCl6]3 56/5/1 3 P.T.O. I S> ~ SECTION B 6. Obr` gmo{S>`_ bmoamBS> Ho$ d wV AnKQ>Z Ho$ Xm amZ H $WmoS> Am a EoZmoS> na {Z Z{b{IV A{^{H $`mE hmo gH$Vr h & EoZmoS> Am a H $WmoS> na `m C nmX ~Z|Jo ? {XE JE E _mZm| H$m Cn`moJ H$aHo$ AnZo C ma H$s nwp Q> H$s{OE & H $WmoS> : EoZmoS> : E = 2 71 V Na+(aq) + e Na(s) H+(aq) + e Cl (aq) 2 1 H (g) 2 2 E = 0 00 V 1 Cl (g) + e 2 2 2H2O(aq) O2(g) + 4H+ + 4e E = +1 36 V E = +1 23 V Following reactions may occur at cathode and anode during electrolysis of aqueous sodium chloride. What products will be held at anode and cathode ? Use given E values to justify your answer. Cathode : Anode : E = 2 71 V Na+(aq) + e Na(s) 1 H+(aq) + e H2(g) 2 Cl (aq) E = 0 00 V 1 Cl (g) + e 2 2 2H2O(aq) O2(g) + 4H+ + 4e 7. E = + 1 36 V E = + 1 23 V Xem BE {H$ W_ H$mo{Q> H$s A{^{H $`m _|, 99% A{^{H $`m nyU hmoZo _| bJm g_` A{^{H $`m nyU hmoZo _| bJZo dmbo g_` go X JwZm hmoVm h & 90% 2 Show that for a first order reaction, time required for completion of 99% of reaction is twice the time required for completion of 90% of reaction. 8. H$maU XoVo h E, dJ 16 Ho$ hmBS >mBS>m| H$mo dWZm H$m| Ho$ ~ T>Vo H $_ _| `dp WV H$s{OE & Cg hmBS >mBS> H$m Zm_ {b{IE Omo D$ _mJ{VH$V g~go A{YH$ Wm`r h & Arrange the hydrides of group 16 in order of increasing boiling points, giving reason. Name the hydride which is most stable thermodynamically. 56/5/1 4 2 9. nmBamobwgmBQ> go Xr{OE & KMnO4 H$m {daMZ H $go {H$`m OmVm h ? g_rH$aUm| g{hV g ~ nX 2 How is KMnO4 prepared from pyrolusite ? Give steps involved with equations. 10. H$moB Eoamo_ {Q>H$ `m {JH$ A , CHCl3 Am a KOH Ho$ gmW A{^{H $`m H$aHo$ Xmo `m {JH$ XoVm h , XmoZm| hr `m {JH$ `eXaO Ho$ gmW AmgwV hmoH$a g_mZ C nmX B XoVo h & B H$m Am grH$aU C XoVm h {OgH$m AUwgy C7H6O2 h & C H$m gmo{S>`_ bdU gmoS>m bmB_ Ho$ gmW Ja_ {H$E OmZo na D XoVm h Omo A H$mo `eXaO Ho$ gmW Amg{dV H$aZo na ^r m V hmoVm h & A , B , C Am a D H$mo nhMm{ZE & 2 AWdm 2 Amn {Z Z{b{IV $nm VaU H $go H$aVo h : (a) \$sZm b H$mo Q>m byB Z _| (b) EWoZm b H$mo EWoZ b _| An aromatic compound A on treatment with CHCl3 and KOH gives two compounds, both of which give same product B when distilled with Zinc dust. Oxidation of B gives C with molecular formula C7H6O2. Sodium salt of C on heating with soda lime gives D which may also be obtained by distilling A with Zinc dust. Identify A , B , C and D . OR How do you convert the following : 11. (a) Phenol to Toluene (b) Ethanol to Ethanal `m hmoVm h O~ D- byH$mog H$s {Z Z{b{IV Ho$ gmW A{^{H $`m H$s OmVr h Ho$ g_W Z _| g_rH$aU {b{IE : (a) HI (b) HNO3 ? AnZo C ma 1 2=2 AWdm Jmo{bH$m_` moQ>rZm| Am a aoeXo ma moQ>rZm| _| H$moB Xmo A Va Xr{OE & 56/5/1 5 2 P.T.O. What happens when D-glucose is treated with the following ? Give equations to support your answer. (a) HI (b) HNO3 OR Give any two points of difference between globular and fibrous proteins. 12. DNA Am a RNA _| 2 Xmo A Va {b{IE & Write two differences between DNA and RNA. I S> g SECTION C 13. 14. (a) {H$gr nXmW H$mo O~ Mw ~H$s` jo _| aIm J`m Vmo CgHo$ Mw ~H$s` AmKyU {Z Z H$ma go mao{IV hmoVo h & nXmW mam X{e V Mw ~H$ d Ho$ H$ma H$mo nhMm{ZE & (b) {d bofU Xem Vm h {H$ {ZH $b Am gmBS> H$m gy Ni0 98O1 00 h & {ZH $b Ho$ {H$VZo A e Ni+2 Am a Ni+3 Am`Zm| _| {d _mZ h ? $ 1+2=3 (a) Following is the alignment of magnetic moments of a substance when placed in a magnetic field. Identify the type of magnetism exhibited by the substance. (b) Analysis shows that nickel oxide has formula Ni0 98O1 00. What fractions of nickel exist as Ni+2 and Ni+3 ions ? 25 C na {Z Z{b{IV gob H$m emf n[aH${bV H$s{OE : Al (s) |Al3+ (0 001 M) || (0 1) Ni2+ |Ni (s) {X`m h : Eo 2 = 0 25 V (Ni / Ni) Eo 3 = 1 66 V ( Al / Al) [ log 2 = 0 3010, log 3 = 0 4771 ] 56/5/1 6 3 Calculate the emf of the following cell at 25 C : Al (s) |Al3+ (0 001 M) || (0 1) Ni2+ |Ni (s) Given : = 0 25 V Eo 2 (Ni / Ni) = 1 66 V Eo 3 ( Al / Al) [ log 2 = 0 3010, log 3 = 0 4771 ] 15. A Am a B Ho$ _ ` A{^{H $`m A Ho$ {V W_ Am a B Ho$ {V ey ` H$mo{Q> H$s h & Bg A{^{H $`m Ho$ {bE, {Z Z{b{IV Vm{bH$m _| [a $ WmZ ^[aE : 3 map ^H$ doJ `moJ [A] mol/L [B] mol/L I 0 1 0 1 2 0 10 2 II 0 2 4 0 10 2 III 0 4 0 4 IV 0 2 2 0 10 2 Mol/L/min The reaction between A and B is first order with respect to A and zero order with respect to B. For this reaction, fill in the blanks in the following table. 56/5/1 Experiment [A] mol/L [B] mol/L Initial Rate Mol/L/min I 0 1 0 1 2 0 10 2 II 0 2 4 0 10 2 III 0 4 0 4 IV 0 2 2 0 10 2 7 P.T.O. 16. (a) AgNO3 {db`Z H$mo ~y X-~y X H$aHo$ KI {db`Z Ho$ Am{Y ` _| {_bmH$a AgI H$m H$mobm BS>r gm b ~Zm`m J`m & Bg H$ma {Z{_ V gm b na `m Amdoe hmoJm ? Amdoe H$m H$maU `m h ? (b) {Z Z{b{IV _| go H$m Z-gm A{YemofU g_Xm~r, ^m {VH$ A{YemofU H$mo {Z ${nV H$aVm h ? AnZo C ma H$s nwp Q> H$s{OE & (x/m-A{YemofU H$s gr_m; t-Vmn) (c) A Am a B Xmo J gm| Ho$ H $m {VH$ Vmn H $_e: erK Vm go A{Yemo{fV hmoJr Am a `m| ? 430 K Am a 190 K h & H$m Z-gr J g 3 (a) A colloidal solution of AgI is prepared by adding AgNO3 solution drop-by-drop to excess of KI solution. What will be the charge on the sol so formed ? What is the cause of the charge ? (b) Which of the following adsorption physisorption ? Justify the answer. isobars represents (x/m-Extent of adsorption; t-temperature) (c) 17. Two gases A and B have critical temperatures 430 K and 190 K respectively. Which gas will be readily adsorbed and why ? {Z Z{b{IV YmVwH$_u` H $_m| go g ~ {g m V {b{IE (a) \o$Z bdZ (b) _ S>b n[a H$aU (c) dm n md Wm n[a H$aU AWdm 56/5/1 8 : 1 3=3 {Z Z{b{IV Ho$ _ ` EH$ A Va Xr{OE (a) T>bdm bmohm Am a H$ m bmohm (b) dr` YmdZ Am a mdJbZ (c) {ZjmbZ Am a ^O Z : 1 3=3 State the principle involved in the following metallurgical processes : (a) Froth Floatation (b) Zone Refining (c) Vapour Phase Refining OR Give one point of difference between the following : 18. (a) Cast Iron and Pig Iron (b) Hydraulic Washing and Liquation (c) Leaching and Roasting 1 3=3 {Z Z{b{IV Ho$ {bE H$maU Xr{OE : (a) H $p S>`_ mam Ho$db +3 Am grH$aU Ad Wm Xem B OmVr h & (b) [Ti(H2O)6]4+ a JhrZ h & (c) MnO jmar` h O~{H$ Mn2O7 A br` h & AWdm {Z Z{b{IV Ho$ C ma Xr{OE : (a) b WoZm `S>m| H$m gm_m ` Bbo Q >m {ZH$ {d `mg `m h ? (b) gr[a`_ (na_mUw H $_m H$ 58) H$s gm_m ` Am grH$aU Ad WmE `m h ? (c) Eop Q>Zm `S>m| mam Am grH$aU Ad WmAm| H$m d hX namg `m| Xem `m OmVm h 1 3=3 ? Give reasons for the following : (a) The only oxidation state shown by Scandium is +3. (b) [Ti(H2O)6]4+ is colourless. (c) MnO is basic while Mn2O7 is acidic. OR 56/5/1 9 P.T.O. Answer the following : 19. (a) What is the general electronic configuration of lanthanoids ? (b) What are the common oxidation states of Cerium (At. no. 58) ? (c) Why do actinoids show a wide range of oxidation states ? g `moOH$Vm Am~ Y {g m V H$m Cn`moJ H$aVo h E, {Z Z{b{IV Ho$ g H$aU Ed Mw ~H$s` bjU H$s mJw{ $ H$s{OE : (a) [Co(NH3)6]3+ (b) [Ni(CO)4] [na_mUw H $_m H$ 3 : Co = 27, Ni = 28] Using valence bond theory, predict the hybridization and magnetic character of the following : (a) [Co(NH3)6]3+ (b) [Ni(CO)4] [At. no. : Co = 27, Ni = 28] 20. (a) (b) {Z Z{b{IV nXm| H$mo n[a^m{fV H$s{OE : (i) {Vq~~ $n (ii) ao{g{_H$ {_lU bmoamo~o OrZ Zm{^H$ Zohr {V WmnZ A{^{H $`m Ho$ {bE {VamoYr `m| hmoVr h (a) Define the following terms : (b) 21. (i) Enantiomers (ii) Racemic mixture 3 Why is chlorobenzene resistant to nucleophilic substitution reaction ? {Z Z{b{IV Ho$ _ ` {d^oX H$aZo Ho$ {bE EH$-EH$ amgm`{ZH$ narjU Xr{OE (a) \$sZm b Am a 1- monoZm b (b) EWoZm b Am a S>mB_o{Wb B Wa (c) 1- monoZm b Am a 2-_o{Wb-2- monoZm b AWdm 56/5/1 ? 10 : 1 3=3 : {Z Z{b{IV A{^{H $`mAm| Ho$ C nmX {b{IE (i) 1 3=3 CH3 CH2 O CH3 + HI (ii) (iii) Give one chemical test to distinguish between the following : (a) Phenol and 1-propanol (b) Ethanol and dimethyl ether (c) 1-propanol and 2-Methyl-2-propanol OR Write the products of the following reactions : (i) CH3 CH2 O CH3 + HI (ii) (iii) 22. {Z Z{b{IV Ho$ {bE H$maU Xr{OE, AnZo C ma Ho$ g_W Z _| Ohm g ^d hmo dhm {M AWdm g_rH$aU Xr{OE : 1 1 2=3 2 (a) Eobr\ ${Q>H$ Eo_rZm| Ho$ S>mBE Omo{Z`_ bdUm| H$s VwbZm _| Eoamo_ {Q>H$ Eo_rZm| Ho$ S>mBE Omo{Z`_ bdU A{YH$ Wm`r hmoVo h & (b) Ob _| _o{WbEo_rZ, \o$[aH$ bmoamBS> Ho$ gmW A{^{H $`m H$aHo$ Ob`mo{OV \o$[aH$ Am gmBS> Adjo{nV H$a XoVr h & AWdm 1 H$maU XoVo h E {Z Z{b{IV H$mo pkb Ho$ KQ>Vo H $_ _| `dp WV H$s{OE : 1 2=3 2 (a) Eo{ZbrZ, p-ZmBQ >moEo{ZbrZ, p-Q>m byBS>rZ (b) 56/5/1 C2H5NH2, (C2H5)2NH, (C2H5)3N 11 J gr` Ad Wm _| P.T.O. Account for the following, supporting your answer with diagrams or equations wherever possible : (a) Diazomium salts of aromatic amines are more stable than those of aliphatic amines. (b) Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide. OR Arrange the following in decreasing order of pkb giving reason : 23. (a) Aniline, p-nitroaniline and p-toluidine (b) C2H5NH2, (C2H5)2NH, (C2H5)3N in gaseous state {Z Z{b{IV Ho$ H$maU g{hV C ma Xr{OE : (a) `m (NH CHR CO)n g_~h bH$ h AWdm gh~h bH$ h ? (b) `m PVC (nm {bdmB{Zb bmoamBS>) g KZZ AWdm `moJO ~h bH$ h (c) `m ~ Ho$bmBQ> VmngwKQ> AWdm Vmn T> ~h bH$ ( bmp Q>H$) h ? 1 3=3 ? Answer the following with reason : 24. (a) Is (NH CHR CO)n , a homopolymer or copolymer ? (b) Is PVC a condensation or addition polymer ? (c) Is Bakelite a thermoplastic or a thermosetting plastic ? {Z Z{b{IV Ho$ C ma Xr{OE : (a) Am`moS>rZ H$m qQ> Ma `m h ? BgH$m Cn`moJ `m h ? (b) S>oQ>m b Ho$ _w ` g KQ>H$ `m h ? (c) {XE JE `m {JH$ _| ObamJr Am a Ob{damJr ^mJm| H$mo A {H$V H$s{OE 1 3=3 : CH3(CH2)16COO(CH2CH2O)nCH2CH2OH Answer the following : (a) What is tincture of iodine ? What is its use ? (b) What are the main constituents of dettol ? (c) Label the hydrophilic and hydrophobic parts of the compound : CH3(CH2)16COO(CH2CH2O)nCH2CH2OH 56/5/1 12 given I S> X SECTION D 25. (a) (b) (a) (b) (a) (b) (a) (b) 26. dm n Xm~ Am a Vmn Ho$ _ ` EH$ AmboI It{ME Ed {db`Z _| {dbm`H$ Ho$ dWZm H$ C `Z H$s `m `m H$s{OE & 2 brQ>a Ob _| 25 C na K2SO4 Ho$ 25 mg KmobZo na ~ZZo dmbo {db`Z H$m namgaU Xm~, `h _mZVo h E kmV H$s{OE {H$ K2SO4 nyU V: {d`mo{OV hmo J`m h & (na_mUw `_mZ : K = 39 u, S = 32 u, O = 16 u) 2+3=5 AWdm AZmXe {db`Z Ho$ Xmo A{^bjU {b{IE & 2 g ~o OmoBH$ A b (C6H5COOH) 25 g ~o OrZ _| KmobZo na {h_m H$ _| 1 62 K H$m AdZ_Z Xem Vm h & ~o OrZ Ho$ {bE _mobb AdZ_Z p Wam H$ 4 9 K kg mol 1 h & `{X `h {db`Z _| { V` (dimer) ~ZmVm h , Vmo A b H$m g JwUZ {H$VZo {VeV hmoJm ? 2+3=5 Draw the graph between vapour pressure and temperature and explain the elevation in boiling point of a solvent in solution. Determine the osmotic pressure of a solution prepared by dissolving 25 mg of K2SO4 in 2 litres of water at 25 C assuming it to be completely dissociated. (Atomic masses K = 39 u, S = 32 u, O = 16 u) OR Write two characteristics of non-ideal solution. 2 g of benzoic (C6H5COOH) dissolved in 25 g of benzene shows a depression in freezing point equal to 1 62 K. Molal depression constant for benzene is 4 9 K kg mol 1. What is the percentage association of acid if it forms dimer in solution ? {Z Z{b{IV Ho$ {bE H$maU Xr{OE : 1 5=5 (a) NO2 erK Vm go { V`rH $V hmoVr h & (b) bmoarZ {da OH$ H$s ^m {V H$m` H$aVr h & (c) N>moQ>m gmB O hmoZo na ^r, Am grOZ H$s Bbo Q >m Z bp Y E W nr, g \$a H$s Anojm H$_ G$Um _H$ h & (d) bmoarZ H$s ^m {V ~h V go Am gmo-A b Z ~ZmH$a, bwAmoarZ Ho$db EH$ Am gmo-A b HOF ~ZmVr h & (e) C H $ Q> J gm| Ho$ dWZm H$ ~h V H$_ hmoVo h & AWdm 56/5/1 13 P.T.O. (a) (b) {Z Z{b{IV H$s g aMZmE It{ME Ed AmH ${V Ho$ Zm_ {b{IE (i) SF4 (ii) ICl3 : `m hmoVm h O~ (AnZo C ma H$s nw{ Q> g_rH$aU g{hV H$s{OE) (i) bmoarZ J g J_ Am a gm gmo{S>`_ hmBS >m gmBS> {db`Z _| dm{hV H$s OmVr h ? (ii) OrZm Z ho gm bwAmoamBS> H$m nyU Ob-AnKQ>Z {H$`m OmVm h ? (iii) gm g `y[aH$ A b e H$a Ho$ D$na S>mbm OmVm h ? 2+3=5 Give reasons for the following : (a) NO2 dimerises readily. (b) (c) (d) (e) Chlorine acts as a bleaching agent. In spite of small size, electron gain enthalpy of oxygen is less negative as compared to sulphur. Unlike chlorine, fluorine forms only one oxoacid, HOF. Noble gases have very low boiling points. OR (a) 27. Draw structure and name the shape of the following : (i) SF4 (ii) ICl3 (b) What happens when (Support your answer with equation) (i) Chlorine gas is passed through hot and concentrated sodium hydroxide solution ? (ii) Xenon hexafluoride is subjected to complete hydrolysis ? (iii) Concentrated sulphuric acid is poured over cane sugar ? (a) CH3 CH = CH CHO (b) (c) 56/5/1 H$m IUPAC Zm_ {b{IE & Amn EoWoZm b Am a EWoZ b Ho$ _ ` {d^oX H $go H$a gH$Vo h Amn {Z Z{b{IV $nm VaU H $go H$a|Jo ? (i) Q>m byB Z H$mo ~o OmoBH$ A b _| (ii) EWoZm b H$mo monoZ-2-Am b _| (iii) monoZ b H$mo 2-hmBS >m gr monoZmoBH$ A b _| AWdm 14 ? 1+1+3=5 (a) (b) (c) g {b{g{bH$ A b H$m IUPAC Zm_ {b{IE & Eogr{Q>H$ A b H$s Anojm bmoamoEogr{Q>H$ A b A{YH$ A br` h , `m| ? C nmXm| H$mo {b{IE O~ (CH3)3C CHO {Z Z{b{IV Ho$ gmW A{^{H $`m H$aVm h : (i) q OH$ A_bJ_ Am a VZw hmBS >mo bmo[aH$ A b (ii) gm gmo{S>`_ hmBS >m gmBS> {db`Z (iii) go_rH$m~} OmBS> Am a X ~ b A b 1+1+3=5 (a) Give IUPAC name of CH3 CH = CH CHO. (b) How can you distinguish between ethanol and ethanal ? (c) How will you convert the following : (i) Toluene to benzoic acid (ii) Ethanol to propan-2-ol (iii) Propanal to 2-hydroxypropanoic acid OR (a) Give IUPAC name of Salicylic acid. (b) Chloroacetic acid is more acidic than acetic acid. Why ? (c) Write the products formed when (CH3)3C CHO reacts with the following : 56/5/1 (i) Zinc amalgam and dilute hydrochloric acid (ii) Concentrated sodium hydroxide solution (iii) Semicarbazide and a weak acid 15 P.T.O.

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