Padasalai Padasalai Padasalai Std .

3y ago
151 Views
2 Downloads
996.15 KB
11 Pages
Last View : 7d ago
Last Download : 3m ago
Upload by : Lilly Kaiser
Transcription

laalia. i.Olaalia. i.Olaalia. i.Olaalia. P.P.P.PwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwStd : 12thTime : 2 hrsrgrgrgrgrgrgrgrg: wwwwwwwwwwwwwwAnswer all thewquestions15 1w 151.Identifytheorergrgore which is notrgrgof alasaCerrusiteasald)Malachite asaaslassssa)Cupriteb)Azuritec)aaaaaaaadddda ada ada ada action wwwwwwwwsodium cyanidewisww wwwww by leaching withwwwwwa)Oxidationg gb)Redox g al which cannotbe reduced byscarbonlaathelaalia. i.Olaalia. i.Olaalia. i.Olia. i.Oaaaassssaaslassssaaaaaaaaaddddddddddaaa ab)aluminium .P.Pa a c)Manganese.P.Pa a d)Chromium .P.PaaP.P.a)zinc.P.Pwwwwwwwwwwwwwwwwwwwwww 4. Which one wwwofwthe following oreswwis best concentratedwwby froth – wwwwwwwwwwww 5. Which of thewwwwwwfollowing is sp hybridised?a) Siliconesb) graphenec) aalaaslalashow ksaasla6.dThethat doesslala the a.P.Pa.P.Pawwwwwwwwwwis wwwwwwwwwwwwwwwwwwwwa) Telluriumg gb)Thalliumc) seleniumd) germaniumggggrrrrgrgrrrOOOOOOOO.iiiiiiii7. aaaaaaaddddddd hexagonal .PPda aTetrahedrala ab)a ad)d none of these .P.Pa adP.P.a).P.P.P.P.a a c) Octahedralwwwwwwwwwwwwwwwwwwwis correct?wwfollowingwwwwww 8. Which of thewwwstatementsgragrchainrgrgrgrgrgrga) Berylai.isOsilicate ai.OOOOO.O.O.iiiiiiaaaaaallllllllsaas2aSiO4 is an energrg is chain genssaasasaasasaasasaasasaaslaaaaaadddddddddda a 2np6a ab)ns2np5a a wwwwwwwwwwwwwwww 10. The radiuswofwwif it crystallizes inwawface centered cubicwww an atom is 200pm,grgrlengthrgthergrgrgrgrg unit cell is .Pa.P.Pa.P.Pawwwwwwwwwwwwwclosewtowwwwww11. The ratio ofpacked atomstetrahedral holewincubicpackingiswwwwwwwwwa) 1:1 Orgrgb) 1:2 Orgrgc) 2:1Orgrgd) O1:4rgrgOOOO.iiiiiiiiaaaaaaaallllasalvacant space inascaslatticeasalaslaal12.Theunit cell disasaasalssssaaaaaaadddda ada ada ada ada wwwwwwwwwwwwwwwwwwwwww13. The crystal with a metal excess defect isrgrgrgrgrgrgrgrgOOOO.O.O.O.O.iiiia) aaaladasasdasasdasasdasasdasas

laalia. i.Olaalia. i.Olaalia. i.Olaalia. P.Pwwwwwwwwwwwwwwwwwwwwwwwwwww14. The rate constantof a reaction isw5.8 10-18 mol lit-1ws-1. The order of wwwwwwww 15. If 93.75% wofw a first order reactionww was completed inww60 minutes , 50% ofwwthesame reactionwould becompletedinrgrgunder the lalalaminutesla minutesla awwwwwwwwwwwwwwwwwwwwwwwwwwwwwwPart- asalasalasal 6 2 12 asaaslassssaaaaaaaadddda ada a.dQuestion No.24aisada adadadsix questionscompulsory . wwwwAnswer any fivefrom remainingwwgrg vapour phase refining.grgrbasicrforrgrgrgrg16. lllllsaasa the limitationssaasaEllingham haveslikealewisacid.wwwwwwwwww3wwwwwwwwww19. How willrgrgyou identify .P.P.Pwwwwwwwwwwwwwwwwwwwwww 21. An atom crystallizesww lattice and has awdensitywwwin bcc crystalof 10 gcm 3wwwithgggggratomr rgr atomsrg rofrg is 43.3 pm. icalculaterga radiusofthe numberofpresent wwwwww22. Give any twoofwioniccrystalswwwwwwwww23. How doof the reactantreactionwith an examplergnaturergrginfluence rate ofrgrgrgrgrgOOOOOOOO.iiiiiiiiaaaaaaaallllasalthe activation energyasal for the reactionas2HIasalK when theaslaal H2 I2 ata40024.Findsssssaaaaaaaaaddddda ada ada ada ada iveis4 10(log4 0.602,8.314 400 3325.6)wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwCalculate the fraction of effective collision of reactants a wwwwwww6 ww3 18Answeri.six. QuestionrgquestionsrgrgNo.32 is compulsoryrgrg .rgrgrgOOOOO.O.O.O.iiiiiiiaaaaaaaallllllllsaasa any five sfromtheirwwwwwwwwwwwwwwwwwwwwores? & iaaaa26. Describethe role of thein the processlasaaslalasaaslafollowingsaaslala n the extractionPaSilica in the extraction.P.(i).P.Pa of copper. w.P.PCryolite.P.Pa of aluminium.P.Pawwwwwwwwwwwwwwwwwwwwwwwwww refining of Zirconium.www(iii) Iodine in the(iv) Sodium cyanidein froth floatation.rgrg the conditionsrgrg which (i) Aluminiumrgrgrgrg to27. (A)aPredictundermight Magnesiumcouldreduce(B).Itispossibletoddddda ada ada ada ada ad.P.P.P.P.P.P.P.P.P.Pwwwwwwwwwwwwwwwcoke at a temperaturewww reduce Fe2O3 bywwwwww around 1200K wwwwww28. What isrgcatenation?.How doesthergrg carbon satisfyi.Orgrgconditions necessaryrgrg laaaaaaaaaladasasdasasdasasdasasdasas

laalia. i.Olaalia. i.Olaalia. i.Olaalia. P.Pwwwwwwwwwwwwwwwwwwwwwwwwwwww29. Write a shortnote on hydroboration& Write a notewon Fisher Tropsch wwwwwwwwwwwwwwwwww 31. Give the differenceswwww and molecularitywwof a reaction.wwbetween order32. KF crystallizesin fcc structurechloridewith unit.Ocellrgrgrgrg like sodiumi.OrgrgrgrgedgeOOOOOO.iiiiiiiaaaaa density of thela 538pm. saaslalengthaaaaaddddddddddaaaaaPa Hydrolysis ofwmethyl.P.33.PPa acetate in aqueous.P.Pa solution has been.P.Pastudied by titrating.P.Pawwwwwwwwwwwww.wwwwwwwwwwwwwwwwthe liberatedgacetic acid against gsodium hydroxide. Theconcentration ofgan esterggggrrrr rgrrrOOOOOOOO.iiiiiiiiat wsfirstorderaaaaaaaallllasalasalasalasal kinetics . asaaslassssaaaaaaaadddda ad t (min)a a0da adαa wwwwV (mL) www 20.225.6www29.5 wwwwwwwwwwwwwwwwAnswer allgfivequestions5 5 25gggggggrrrrrrrrOOOOOOOO. i.34.(a)zone refiningwith an sexamplelaalia. .P.P.Pwwwwwwwwwwwwwwwwwwwwwwan example.wwwwww(b). Explainwwthe principle of electrolyticrefining w(b). Writeelectrochemicalprinciplesrgrg a short note onrgrgrgrg of the structureasDescribeasal of diborane. asaasalasalaslaalssssaaaaaaaaddddda ada ada ada ada ww(b).Completethe following reactions& balance witwgrg Na BO H O.OOr rgrgrgr4g ? Na2SOi.4O rg4Hrg 3BO3OOO(i) 2B Hlia.2OSO.?O.i332liai. (ii) Na2B4O7 aaadddddddddda a ) BF3 H2O .?P.Pa a (iv) BF3 NaH.P .Paa ?aa ?aaP.P.(iii).P.P.P.P(v) Bw wNaOHwwwwwwwwwwwwwwwwwwwwwwwwwwwwrgrg the percentagergefficiencyrgrgin case of bodyi.OrgrgrgOOOO37.(a).laCalculateof rystalsaastwosaasa crystalline solidssaasa wwwwwww amorphous aaalaaslala(b).ExplainAAAAdandand ABCABCsaaslalasaaslaABABAsaaslala type of cking.P.Paof neat diagram.P.Pa.P.Pa.P.Pawith thehelpwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwrg grgrgrgrgrgrgOOOOOO.ila.Oiiii.Or the ssssaaaaaaaaaaddddda adrate determiningaa ada ada adad with an wwwwwwwww Orwwwwwwgrgrselectionrgrg agent dependsi.onrgthergfactor:(b). iTheof reducingrg aasa with an example.&saasaWhat is the differencesaasa between mineralssaasa and aaaaaladasasdasasdasasdasasdasas

laalia. i.Olaalia. i.Olaalia. i.Olaalia. lasssssaaaaaaaaaaddddda ada ada ada ada allllasalasalasalasalaslasssssaaaaaaaaaaddddda ada ada ada ada allllasalasalasalasalaslasssssaaaaaaaaaaddddda ada ada ada ada ice isn’t the thingyou do once you’re good .It’s the thing you do thatmakes you do that makes you good

laalia. i.Olaalia. i.Olaalia. i.Olaalia. nrgrgrg18. .P.P.P.P.P.Pwwwwwwwwwwetc. Eg. AlClw3.6NH3wwwwwwwwwwwwwwwwwwwAlCl [Al(NH3 NH33)Cl3]rgrg Part – saaslala boric acid ordadboratesaaslalasalt is heated Cerrusite.P.Pa.P.Pa with ethyl alcohol.Pin.P.P.wwwwwwwwwwofconc.ww 2.b)redox d.The vapour of thislaesteri.O Zinc blendea–laaZnS)i.Olaalia.Olaalia.Olia. i.Olia. i.Oburns with sasla4.d)Sphalerite(aaaassssssssdaadathis reaction is Padaada2adaadaadaadaadaada agreen edged flameaand– spwPPP.wP.5.b)Graphene.wP.P.wP.P. .P.wwwwww presence of borate.used to identifyww 6.b0Thallium wwwwwwwwthewwwwwwwwww𝑪𝑶𝑵𝑪 𝑯𝟐𝑺𝑶𝟒4HBO 3CHOH iiiiaaaaaaaallllllll8.d)Spodumeneis chain silicateB(OCsaasasaasasaasa 2H5)3 3 H2O dadsaasasaaslaaaaadddddddda a wwwwwwwwww 10. a)565.6 pm wwwwwwwwone20. Some elementsexist in more thancrystallineg molecular forms.O.inOrgrgrgrgrgrorrgtherg samea 2 𝟐 ri.OOOO.O.O.iiiiiiiaaaaaaaallllllllphysicalsaasa statesaasasaasla saa2sa 1.414 200 dadsaasaaaaaddddddddaaaaa a Allotropes of carbona a;Diamond , graphiteaa.P.P.P.P.P.P.P.P.P.,P 565.6wwwwwwwwwwwwwwwwwwwwww nanotubesww 11.b)1:2wwwwwwfullerene , carbonrgrg efficiency is iaaa21.ρsaaslalasaaslalasaasla la10 gcm-3 r 43.3pmsaaslalaNumber of .P.Pa.P.Pa atoms.P.Pa.P.Pwwwwworderwwwwwwwwwwwwwwwwwwwwwρ 10 gcm-3ww a 100 pm Mass ww1gRate constant for zero order isgggggg-1 -1 rgrgrrrNo ofi.atoms i.OOmol lit las ia.Oia.Oi.Oi.Ori.Or 4 in bcc unit .d)minutesaaaaaa r 43.3pmddddda ada ada ad 3a ada ad 3P.P.at.P.P.P.P.P.P.P.Pwwwwwwwwwwtheendof4t 93.75%decomposes1/2wwwwwwwwwwwwwwwww 100 pm www4t1/2 60 minutes3-10Volume ofunit cell a (100 x r10cm)3ggggggggrrrrrrrOOOOt1/2 15laminutes.O 3laalia. i.Olaa-24laalia. i.O s10lia. i.Olia. igcmaaaaassssaaslassssaaaaaaaaaddddddddddaaaaa a Number of atoms.inaaaa.P.P.P.P.P.P.P.PwwwwwwwwP.P1g of crystal wwwwwwww𝑍 𝑀4 1wwwwwwwwwwww 23ww 4 1023Part – B𝜌𝑎310rgrg form volatile diiiiaaaaaaaallllllllasaasareagentsaasasaasa solids have ywhendissolvedmetalgrggrggrggrginrrrrOOOOOOOO.i. rate ofwater.17. doesai. tell anything wwwwwwwwwww23. The physicalof the reactantalsodoes not give anyideaabout the possibilitywwwwwwwwwwplays an rimportantrole to influenceof other reactionsgrgrgrg that might be takingrgrgrgrg theOOOOOOOO.iiiiirateGas .aslaareactionsaslasssssaaaaaaaaaadddddd reactionsa adinterpretation of .ΔGa aisdbased on thea adfaster as compared.P.toa athea adP.PPP.P.The.P.P.P.Pwwwwwwwwwwwwwwwinvolving solidor liquid reactants wwwwww assumption that wthewwwwwreactants are in wwwFor example,equilibrium withgrgrg the product whichrisgrgnotrgrg reaction of saasasaasasaaslaaaaaaddddddddddaaaaa a reaction between .solidaaaa.P.P.P.P.P.P.P.PwwwwwwwwP.P sodium and sasdasasdasasdasasdasas

laalia. i.Olaalia. i.Olaalia. i.Olaalia. P.Pwwwwwwwwwwwwwwwwwwwwwwwwwwww , Coke can reduce FewwO .Around 1200K2 3 𝑬𝒂 rg gggggggrrrrrrria.Oi.Oi.Oi.Oi.O24.f sCatenation is an abilitys of an element dadsaasla28.aaaaaaaaddddddddlog on both omswwto form chain wofww 𝑬𝒂wwwwwwwwww log f wwwwwwww(i) the valency of carbon is 4 which is𝑹𝑻rgrgrgrgrgrg two,rgrgf 4 10i-18greaterthanOOOOOOOO.iiiiiiiaaaalalala-18 𝐸𝑎ala forms covalentsa thlog(4) ddddddddddaaaaa2.304.PPa an ability to bond.P.Pa.P.Pa themselves should.P.have.P.Pa.Pawwww 400𝐾wwwwwwwwwwwwwwwwwwwwwwwwwwwith itselfgrg 𝐸𝑎g-17.39 ue.2.303 8.314 400𝐾 aaaaaacovalentbondddddda ada ada ada ada adP.P.17.39.P.P.P.P.P.P.P.Pwwwwwwwwww 2.303 400𝐾 8.314 EawwwwwwwwwwwwwwwwwwwwEa 137.32 kJ mol-129. on Fisher tropsch synthesis.rgrgrgrgrgrgreaction of llllllllsaasasaasasaasahydrogen at a pressuresaasaof less than 50 (ii) extraction of crude rgOOOO.O.O.O(iii) refiningcrude metal aasasaasasaaslaaaaaaddddddddddnCO (2n 1)H CH nHO2Pa a2 Pa aaaaaaa.P.P.P.P.P.P. .P n (2n 2). .PwwwwwwwwwwwwwwUsesofzincwwwwwnCO 2nH CH nHOn 2n2w2wwwwwww wwwManufacture ofgrgpaints, rubber, cosmeticsrrgrgrgrgrgrgOOOOOOOO.ilai.iiiused inalgalvanisingmetals slalaaslala alkynes in asaaslaasssssaaaaaaaadadadsteel structures .P.Padadadadether solvent at roomadatemperature.adadThis .P.PP.P.and.P.P.P.Pwwwwwwwwwwww produce die-castingsww in the automobile,wwwwww hydroboration andwiswwwwwwwwreaction is calledwelectrical andrghardwareindustries rg

10. www.Padasalai.OrgThe radius of an atom is 200pm, if it crystallizes in a face centered cubic lattice, the length of the edge of the unit cell is a) 565.6pm b) 848.5pm c) 884.5pm d) 484.5pm 11. The ratio of close packed atoms to tetrahedral hole in cubic packing is a) 1:1 b) 1:2 c) 2:1 d) 1:4 12.

Related Documents:

std no. 202 std no. 203 std no. 301 std no. 302 std no. 401 std no. 402 std no. 403 std no. 404 std no. 405 std no. 406 std no. 407 std no. 408 std no. 409 std no. 410 std no. 411 std no. 412 city of montclair standards an

Plate Plan It is recommended that a plate plan be designed before starting the assay. A plate plan template is provided on page 28. The following is a suggested plate plan: 123456789101112 A BB B Std 7 C Std 6 D Std 5 E Std 4 F Std 3 G Std 2 H Std 1 Std 7 Std 6 Std 5 Std 4 Std 3 Std 2 Std 1 B blank (Assay Diluent), Standards 7 through 1 .

UKG 1500 1500 STD I STD II 1550 1550 STD III STD IV 1600 1600 STD V STD VI 1700 1700 STD VII STD VIII 1750 1750 STD IX STD X 1800 1800 STD XI STD XII 2500 2500 Installment Month Due Date With fine I II III IV V June - July Aug - Sept Oct - Nov Dec - Jan Feb - Mar Before Text Book Distribution

STANDARDS Military MIL-STD-481 MIL-STD-490 MIL-STD-681 MIL-STD-961 MIL-STD-1 174 MIL-STD-1267 MIL-STD-1 306 MIL-STD-1 464 DOD-STD-1 476 DOD-STD-1686 DOD-STD-2 167 MIL-STD-21 75 HANDBOOKS DOD-HDBK-263 Configuration Control - Engineering Changes, Deviations and Waivers (Short Form) Specificati

Michelin LT225/75R16 Tires, Balanced STD Stylized Aluminum 16” Wheels STD Nev-R-Lube Bearings STD Nev-R-Adjust Brakes STD Spare Tire – Full Size STD 240w Solar Package with Interior Monitor STD Rear View Monitoring System STD Cable TV Hookup STD Satellite TV Hookup STD Dedic

Electromagnetic Interference: MIL- STD-461F Ballistic Shock: MIL-STD-810G Life Fire: MIL- STD-810G Explosive Environment: MIL -STD 810G Altitude to 60,000ft: MIL -STD 29595 Explosive Decompression: MIL- STD-810G Salt fog: MIL -STD 810G Sand and Dust requirements: MIL-STD-810G Extreme operating . environments . Commercial NATO

MTL-STD-1629A 3. DEFINITIONS 3.1 Terms. The definitions of terms used herein are in accordance with the definitions in MIL-STD-280, MIL-STD-470, MIL-STD-721, MIL-sTD-780, MIL-STD-785, MIL-STD-882, and MIL-sTD-1388, with the exception and addition of the following: 3.1.1 Contractor. A private sector enterprise engaged to

Language Policy in the Russian Federation: language diversity and national identity by Marc Leprêtre Abstract This paper gives an overview on the different language policies implemented in the Russian Federation, stressing the relevance of the historical background, the relations between language and nationalism, and language promotion as a tool for preventing inter-ethnic conflicts and for .