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ICSE Class X Prelims 2025 : Chemistry (St. Xavier's Institution (SXI), Panihati, Kolkata)

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Sharanya Mistry
St. Claret School, Debpukur, Sewli - Telinipara, Kolkata
ICSE Science
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101Tho _ , wilh hlghe1I lonl,ollon poter~lol l1 IHydn)gen b)Mag-lum c)C olum d)Helrum 11 )A Ilr1p ol copper lI placed In lour dlflerenl ooh oolutlonI a, given below, Which ol lho I0IU11on will finally lurn blue? a)KNO, b)Zn(NO,), c)Cl(NO,), ~NO, 121Tho Inert electrode used In the electrolyalo ol ack!ifred wa1o, l)Nlckel b)Copper .c)P111lnum d)S13)Formlllon of chloroform from melhano la an example ol l)Addltlon b)Suba1iMlon c)Dehydr11lon d)Ellmln111on 14)Tho empirical fom,ula of a compound EF,Jf lta empirical formula weigh! ii equal 10 its vapour denally 1hen Ila molecular would be 1)E.F b)E,F, c)EF, d)EF, 15)The aim ol lhl experimental Ht up diIplayad by the given diagram le lo demonolralo That lHCI 1o highly oo1Ut>1e tn - b)HCI 1o en ecldle gu c)HC\ \1 haawtf \Nin a\r d)HCI lo com,eMl ln _,.. j r. ,,,{ ~ ... ', liOnS en lead i,n,,node, ansWO< lhe f - . g ques )W,u, sl>OCI lo lhe electrolyolt of mott (51 ? )W hy It lhe electrolytic cell mlode of silica e? anod the at Mt obse ou do_y b)What c)G iw lhe. -,.IIC!Jon at cathode. should be in ils moilen slate? d)W hy It k Important thal lead bn,,nide platinum electrode In thlt elec1rolyllt? lhon rred e)W hy graphite ele c1r - It p,efe (5x1 5) mn-a HJM tch the following column-A with Colu Column-8 Colu mn- A !)No n polar compoond a)A bll d 2)Poiar covalenl compound b)Ethyt alcohol to Ethene 3)Conc:entrated sulphuric add c)lce )Glec;ial-.:add d)Nitrogen molecule 5)C ultic: ,ode e) W _. ,_ t ~ }.. L /, brac bta etng the cot'T9Ct an.. ...,. f,-om the u,)C om, .._ ~ tollOV)'.tng by choo g n . halo In ~ ~ hlgh eat ~ IC~ llod lne ) h -_ __....ce Jo a)_ t"" -to r\W-e_ _ _, ld- _ o a ~ . . . . . . . . . . . . l)y,.n ~oo tM r\o (~H .) eno. )buml; with yelow llh gree n nam e~ prea ot o.q,v en. __.Propane/Ethene/Elhone) d)Second homolog"" of alkeno is _ _ _ _ _ __ a,.,. t>on dcw .lea e)S ui1- met hod 10_ ion) posff ecom ble-d (Oitpla<:ement/NeutraUzalion/Oou (5x1 =5) lv)Nome /Stato the f-n g:ion. ide ii ccnverted 10 chlor )The ene,gy relea Nd when clllollne gas the same whete both the electrons are donated by rons eloc:t of b)The bond form.d' by lham g ttom. ior metaJ. c)The COIiing of a superior metal on an Infer s. bond g Unkln Nlf form to d)Abllffy of an atom h molal can be extracted. e)Naturaly oca. mng materials from wllk: wlng vJ(a)Orow the atru ctvro l torm ull for toao ne I) 2,2-llfmethytp,opa i) P,.,, .n-2 -oi (b)Wrtte the IUPAC nam e for the fol/owing CH3 I CH 3-C H-C H-C H2 com poun do: compoundo: (2+3'-5) St. Xovlofo lnaUtullon(Rulyo) khool Code:.WS 404 R.tlNrul TNt (2024-21) Clos J( f M.-IO -~ Tlmr.-21-n lMd!m:11 ltctlor).,t, HO Mnt CoaPMIIO!Yl 1,1,_ ...... q - . J ChooN the con.et_ __,. to 1M qunttons from tM otven opdon 1)An edd oblllned ftnm concentrated nitnc Kid on reaction With Si;ptu la a)Can>onlc add (t5x1 15) ,,s.,....,. .... c)NiMc add d)Hydroch loncadd 2)FI.O ed- 11 rwducedto lumriJmonly byotec:tlOlytlc ,_ Ince: ~umlna 51 hlgtty stable end ha strong affinity fo, Ok)'g8f'I - nd ... --for() ,cygon - - - by re duci,g_... _ _... 3)A compound 'R'il t.e'9d In a tel1 tube -.Ith conc:.ntrlt ed sulphuric: acid, g\au rod dipped ln anvnonit 10lut.lon whtf1 bfougtt nu, tht gm; evOIVed prodUCff dense white furnel. WhiCh cf d)',k,nk>al nol_by htolow ingoou d-'R'b a? -- .-,sodiuonchloride C)Sod lumd)Zinc <llp,lde )Anwtlon: Cone. H,$0, and not CaO, can be UNd II a drying agent ro, HCI gn ~ In ---,. Reaon: HCI can rNCt ~ CaO bu\ not HzSO,, ~ AaMnlon and"-o n . . .-uebut Reaeon 11 not the c o r N d ~ o l ANenlon -Wl8,aO\ "-"Ian a n d ~ . . lr\MI a n d ~ lhe oorr9d uplenetion of MNttkNI c.)~'& ~Wft. ..onla t.... ~-'-"""-" -""'-" '-5)'Th9..., - -~ == - _\...-clk< i .... extrec:tlon ollronls b)C l mlne .ajA em- O)Typa o l - - ;, S I mmonl c c)Coordln lo. - = :::.,,:~hlomuaoA,(SOJ,.-positionolAk,~ -II: )- 3 group 2 ,blt'ottod3 group13 __ .~ c~2gro up15 d)Pel1od3 group1 e)Sulphlda ..... ~ - b y ._,. )Hy<ltolytlc method -4.,. 8)An...,..,_ ..,. _ _ _ a)HOCI b)NH.CI ANCI, d)HCI nd _ _ _ _ ., ~ H H-csc-9-H ~ H-c-c- H I H m H SecUon-B140 M rl\tl [Attemot any tour aunJlont from tht follqwlnqJ . Quntlon-3) (3+2+3+2=10l a)The l,gUte given below depicts ammonia gas passed through red hot Copperjl\J oxide in a hard glass test tube.With reference to this.answer the following questions- --i --- i)Give balanced chemical equation for the above experiment. il)State the property of ammonia exhibited. iii)State your observation when Copper(ll}oxide is re?'aced by Leadlll) oxide in the above figure b)Give2!1! chemical test to distinguish between the following compounds: i)Copper oxide and Manganese dioxide (using cone. HC\l HlSodium carbonate and Sodium oulphite (uolng dil.H,SO,) c)Atuminium carbide reacts with water acc ding to the following equations: AI.C, + 12H,O ~ JCH, + 4Al(OH), i)What mass of aluminium hydroxide is formed from 24g of aluminium carbide? ii)What volume of methane is obtained from 24g of aluminlum carbide? (Atomic weights: AJ=27, C 12, H 1, 0 16) d)Draw eleciron dot diagram lo, the lo<mation ol !)Magnesium chlo<ide lllHydronium Ion. /QHttdo!l:41 . (2+3+3+2 10) ,)Compound A la bubbled through bromine dtSsolved In carbon tetrachloride and the product is CH,Br - CH,Br IJOraw the 1 1tuctural formula of A. H)Whal la your obleNation? ,tiP' Int c1111gr1m, which hows brown ring loot ond nnawer the questions 1h11 follow Iron (Ill 1ulph1t1 brown ring ( z Brown Ring Tut ,)Which ion Is detem,ined by brown ring test? ,,J<'fNhY Is freshly prepared lron(II) sulphate used In the teat? . 111)St11t why the brown ring decomposes completely on disturbing the test tube? of c)One variety of household fuel Is a mixture of propane (60%) and butane (40%). If 20 litres The re. atmosphe the to added dioxide carbon of volume total this mixture is burnt ,find the combination reac11ons cab~ represented as: C,H,+ SO,- 3CO2 +<41-1,0 2c,H,.+1 3O,-eco , 10H,o d)Use lhe 14o11ero only wri1ten In lhe Periodic Table given below to answer the questions that follow: 1)St11e the number of valence eleclrons in atom J. )'Nhich element shows forms ions with a single negative charge? il)Which metallic elemef1111 moro reactlvo than R? iv)Whlch Nment has rt, efectrons arranged In four shells? 1() (2+~+3+1 ~ the for method lnd111trlal lhe to refffl which 1)Copy and complete the following table prtp111loon of Nine acid and Sulphuric acid: Catalyllc equallon(Wilh the Name of the process Name the compound catalyst) Nlllfc ICld Sutphu,oc acid l (ij (11) (ii) (IV) ~ b)A compound X con,1111 of 4 8% carbon and 95 2% bromine by man ploce ~Ooto,mine tho omplncal formul1 of 1h11 compound wor1<lng corre<:1 to one declmol compound' the of formula mol4oculor lhe II Whit 262, II compound the of dln111y i)H tho vopour IC l2, Br 80) c)Anango lhe following according lo the rllltuetion1 glYln In brlcklll Phosphoric acid. Sulphuric acid (In the dlcre11lng order of ba1lclty) N1",H'' (In the ordl< of pref1<ontlll d11chl,vo II the Cllhodo) ------r ------~-~--------monllonod In lho box D)1"' trt provided wllh Iha Ila! of tht!mk:nlt on1f1, hydrochforfc acid, copper, tllut t c1rb tr(II) si4u tn hydr orfdo toful lon, copp ~ r k acid, chlorlno, Iron, zinc 1/tr'G 1urt1blo chomlcals lrom lho 1111 glvon, wrllo balancod equellontor !ho proparellon at lho ,alll menl,onod below l)Co9Plr 1ulphalo 1)Sod1um zlncale odea Sludy lho diagram given and c)CuSO, tolulion Is electrolyoe<I umg Cu oloctr enswer lhe queslions Iha! follow: _,, 1~uw u1 ,0111 1,iv -- e Cop per (II, aulp hat. e aol vtl~ J elee1rode? ~Which eleclrode (len or righl) is lhe oxldising at the oxidising e4ectrode. ring occur ion react the for ii)Write the equation clysls readion. eleclr the m)Slale one appropriate observation for 2, 7 and 12 respectively. Which solution: d)M1yan~ has solutiont X, Y and Z with pH valuH NH.Cl? i)W~ liberate ammonia gas upon heating with r? pape litmus on t \\)Will not have any effec ic:al formula? e)Whal do you undenland by lhe term emplr (3+2+3+2 10} ~ and balance them: )C om ~ followlng chemttal equations \'ICaC . + H,0 V)C~+ NK,( exce 11)- ili)Pb(NO,) + HCI - ' b)Give reaaon1: i)For electroplating wflh Hver, lhe NCtrolyte ~ , nitrate solutJon. sodium argentocyanlde solution preferred over atomic size of gmup 17 elemero. i)Alomic llze ol ~roup 18 elements Is mo,e than . Choose the property A.B, C c)Some properties of sulphuric acid are listed below responsible for the reactions {1) to (3). tile acid, D-Oxidising agent A-Typical acid, 11-0ehydrallng agenl, C-Non-vola f1)Cu itH.SO,-CUSO, +SO,+ 2H,O {2)C,,H.,O., + H,S0 ,-12 C + 11H20 f3)Zn + H,so ,-2n so, + H, ' D,mlch is d)Name the following organic compounds: functional group Is a csrboxytic acid. l)Tho compound with 3 carbon aloms whose n of ethyne. f1)The compound formed by complete chlorinatio ~)Al'", F' , Mo '', N' mic 111.0) (In tho 1nc,ea1log ordorof ato de up of Copper, d)Name the alloy which II ma z.nc end i1n. (3+2+3+2=10) Qu Hd oq -6) of Numina to Aluminium e the process of converaion a)The following sketch ffluslrat the folowlng: Study the diagram and answer J ( j l X , ~~ cess? l)What is the name of the pro I divalent metal in ii. eledrolyte mixture which has th~ of ent iOName the conttitu . oe at the electrode Z (cathode) ii)Write the reaction lak.ing pja s IO k& n of A and B. student perfonned on aqueou a ts tes the ws sho le tab g b)The folowtn \-\'hat ire his observations? Conclutlon Observations Test A contains Fe"" ion t. a) 1.To 10/ulion A. NaOH 1olutJon wa s added B contalna Cu '' len s. 2. To aol vfio n B. NH .OH tin olu tlon wa s add ed 1/o wfy / ir w In exc ;eu b) c)Give reason: t aoicfs. ats as gases, liquids or sof gaa. i)Cova\ent com pou ndl exf hydrochloric ocl d from HCI uoed to ill e,.. em ong om nol fun l ll)A apoclo _, ,., ,.. lo ffr o. Ul)Eloctron affinity of ,_ 0'1 , . ff Avogadro' number Ja a.1 gen oxy of t Jle leo mo "' 1<> d)A gaa e-Jtinder conta\ns 12x Calculate: t tn the cytinder. i)The ma n of oxygen presen r. (CP16J at S.T.P present In the cy1inde ll)Th volume of oxygen (2+2+3+2+1=-1 J) . Y,Z . W.X ts ,,.n ~ of the ..., the eleetrc>mc configuration a)The folo win g table shows y 2, n based on the table ebove: Allswer the foflow!ng questio ., ._ , W Ind X. l)Whal typo ol bond II fom,ed between X and Z. v; ::; J =t 'f: 'th ~t':: :u : ':, r~~t Wa nd Y compound foonod betwoen lv)W hll 11 the formul.l of the J ~ I _J ------------- \ ST. XAVII \R 'S INS TIT UT IO N, RU IVA SC HO OL CO DE - we 404 RE HE AR SA L EX AM IN AT IO N SESSION - 2024-25 CL AS S- X SU BJ EC T- BIOLOGY TI ME - 2 HO UR S FU LL MARKS - 80 SE CT I0," 1 A 140 MARKSf Qut'5lion l Cli, oow tH cv ntt t an1 wc n 10 1he qua tkH i, rrom 011 tin qun tio n. Wr it thit cor fftt - n cro.ly.) opt io.t . (Do .ot cop y Ille 1151 h) TM &round s.ubs1ancc l)l" ~n t m chk wop lut l) a) Sto ma b) Stro ma <l Gl'llna d) 'Thy\akoids ju) AslCttM>n (A) : 1bc mai n pulm ona ry ,n1o lhc lun p. RHJOn {R) Inside 1'w: ~ . air s.aa , ) b) c) ..d) Mery !>'Imps OA )'ia wcd bk, Ult ane ry divldes aeva-al 1im od (rom chc ril,ht ventricle , d 10 form c.api\11rict. lll!Und the, Bo thA nd Ra reT rue Bech A and R are Fab e A is True and R is False A., 1r. tsc :1n dR i,T r~ (iii) A 11 of a lc f of an aqu11ic. plan1 ,s kq, t 1n S% ult soluttOl'I fo., phf flom at0 n whteh will ta~c place ii/arc: a) Tur sidi ry .ti) flacc;:idity C) Turgidity and Flacctdity d) No nco fthe abo vc IOm C 1ime. The (iv} The pan 1h11 is cul in v1sc c1CMny is: 1) Urcthni b) O,,idUCI c) fallopian tube' .d) Va1 dcfcrens h) A~s eni on (A) Sym p.lt hct K ncn ous system prepare$ the bod y fo,r vt0 knt actK>t\ 1gains1 a l ~ ~ ~;t ~:: pa ihc tic nerv ous ,ystc:m accc:lc:fltn the hc: rtbc :al ..a) Uo thA and R aJT Tru c: b) Boch A and R arc False c) A h True and R is Fal~c: d) A is hi ~ and R ~ TNc: I "'--""1H"'ft fA) 1,1, I Alu1~11o111 ., \lkt.k-111 11,mwc 111 ,,~ ltCIH'III 111 t('1UII Mc- !1<111 IHI \ll ~le-, rll n111,rmln I, 11 11) 11,tth r\ 111kl H " I 111r l') 11,-ch /\ lltkl k ,,. I 111" , I A" lmr ttlkl K , .. 1111,c- hi'""' ,li,r ,r (1111,c I hy 11c1w m111,1111.,n JI A 1, 111!,tmHI M,,. lrm O,>,tn111cd hlood to Jiu~, i~ ,upplicd hy al 11~11, , cm 1,, ) b) ftrp;111c J'Or1111 \'Cut i.:) lnfcr101 Ytn11cav11 . d) I kp:at1c artery Qu<11ion 2 ~ n1c thc (l) rsr following: (a} The passacc of substances from ils lower to higher conccnlnli on lhrough living cell membrane using cell energy. lb) The nutrU111t layer of the eye which also prevents reflection oflight. le:) The c.anal throuah which the testes descend into lhe Krotum just before 1he birth of a human mate ch1k1. td.T TM number or individuals per ,quarc k1\omctcr at any given lime. (c) A pal, of COffCli)Ondina chromoaomcs of the Hmc lhapc and 11zc one from each parent. (II) f,'111 Jn 1hr blank, wllh 1hr suitable words. When we pass from 11 brightly lighted 1rca lO I dirt room, we upcricncc difficulty in seeing the objects but slowly, our vision improves. This improvement is called (1) _ _ _ _ _. This chanae is due lO rcgcncn.tion o(lhc (b) _ _ p1gmen1 of the (c) _ _ _ _, and also due to the (d) _ _ _ of pupil permittin g~ (,)_ _ _ to enter the eyes. (Ill) Arran,:t and ,ciwrllt lht ler1ns In uch lnMIP In the- atnffl order 1G as lo be- In a (5( logical Sl'Cfucnrl' b, ,tlnnln& with 1hc term 1h11 l.s undtrlintd. ta) Ear qssklcs, .finna. Auditory nerve, AuditO')' canal (b) Pcocock, Rat, Qawa. Snake (c) lmplan11111ion, Gcs11tioo, Parturition, fini1illUJw (d) Homo crtttus, Neanderthals, Australopi1bccus- Cro magnon (e) K i d n e y , ~ Urc1hr1, Urinary bladder, Ureter (h') KHd lht uplanatlo nt give below and amt 1be 11nu::1urt. (1) The pan of the bruin which it concerned with memory lb) The pore bcanng s1mc1ures on 1hc m1rgins of the lc1f10 allow cxud111on (cl Transparent cpithcltum over 1hc comco. ldl I he lube th111 conn U lhc ca\'il)' of lhc middle car with the lhn>31 (c) Ttk naucncd un where hght reiicuon occur1 m plants. (5(

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