1. B mn: Ha hc 12 2. LUT THI U Mi t trong lp hc tng ng vi mt i, mi t trngcng c chn lm i trng. Cuc thi gm 3 vng v lut chi s c ph bin trc mivng thi. Sau mi vng thi, im s ca mi i s c cngb.Chc cc em thi u thnh cng !!! 3. KT QUVNG 1 VNG 2 VNG 3V CHI 1 I 2 I 3 I 40 0 0 0 4. Trong thi gian 60s, mi i phi tr li 5cu hi ca chng trnh, mi cu tr ling s tng ng vi 10 im. Tt c thnh vin ca cc i u c ththam gia vng u bng cch tho lun va ra kt qu chnh xc nht. Nu cu hi kh c th b qua nhngkhng c quay tr li. 5. 1 2 3 4 512345601234567890123456789Gii thch ti sao lm tinh khit mt loi Cu cQui tc no thng c dng xc nh chiu caln Cho tp bit cht tnh l cht Al, ha Fe ngi hc c ta bn phi nht ngm ca kim hn loi hp?kim loi ny trong Cu(NO3)2 d ?Cho biCth to nbi ktim phn t nlo kiim ng c lo oxi kih ha ci l kh cngn gr ?ilnng n lhnt ?nht ? 6. 1 2 3 4 512345601234567890123456789Trong cc nguyn t sau, nguyn t no lC dung dch FeSO4 ln tp cht CuSO4. Hynu mt phng php ha hc n gin CChoh ob ibitC tth nong b ukiiymt n tlo nnh ik cinm gn lohyi ni td nn n nhinnngg t cthtn nhyh cthht ?pt vnht lt ?kim loi nhm IA:chung ca kim loi ?Al, Cu, Na, Fe, Fr, Sn, Rbloi c tp cht. 7. 1 2 3 4 512345601234567890123456789Gii thch cc hin tng sau:-Cho bt Fe vo dung dch CuSO4 th muxanh ca dung dch nht dn.-Ngc li cho bt Cu vo dung dchFe2(SO4)3 th dung dch tr nn xanh m.Cho bit trong nhm sau, kim loi no lCChhoo Cho Cho bbiitt bit bit ttnn tn sn kkiimm kim phm llooii loi cc c chung kkhhii khi no llnngg lng c rriinngg ring to nnhh nh thnh nnhhtt nht khi???Cho bit thang o cng ph bin ca kim loi ?nhng nguyn t sRb, Hg, Sn, Al, Ba, Kkim loi phn ng c vi nc ? 8. 1 2 3 4 512345601234567890123456789Gii thch ti sao khi t ming vng hay bcCc kim loi no sau y c cng kiu mngtrong khng kh th khi lng khng inhng vi ming st hay ng th khi lngli i ?Cho bit trong cng iu kin, ion kim loi notrong nhm sau c tnh oxi ha mnh nhtChCCCohhh Cho boooCi hbbbotiii bit tbttt itttn tn tknnn ki mkkkimiii kim mmml ol ollloooi loi ic iiin c ccc noh khi kkkcihhht tiii nlllh lng n dnnnngggo grrr ring ciiicahnnnoggg yn nh nnn hchhhaot? nht nnnnhhhhtttt ?????tinh th lp phng tm khi:Na, Mg, K, Li, Ba, Ca, SrFe2+, Cu2+, Sn2+, Ni2+ 9. Vng thi gm 3 cu hi, thi gian tr li l15s sau khi kt thc cu hi. Cc i trnh by cu tr li vo bng. i no a ra cu tr li ng v theoth t tr li sm s c cc im tngng 40, 30, 20, v 10. 10. Cho bit tn kim loi ang c nhc n?Hy trnh by p n trong khi xem video 11. Vit qu trnh oxi ha kh xy ra ccdng v m trong phin Giavani sau:Hy trnh by p n sau 15s khi xem xong video11010001015203162734918054 12. Hy gii thch hin tng th nghim sauC 2 ng nghim ng dung dch sau:ng 1: dung dch HCl longng 2: dung dch HNO3 c- Cho mt dy st vo ng nghim 1 th c hin tng sibt kh.- Cho mt dy st khc vo ng nghim 2 th khng chin tng g. Sau tip tc a dy st vo ngnghim 1 cng khng c hin tng g.Hy gii thch hin tng trn v cho bit kh sinh ra caphn ng trong ng nghim 1 l kh g ?1101010001015203162734981054 13. Mi i c ba lt chn ngu nhin cu hic mc kh khc nhau tng ng vi ccmc im 30, 20 v 10 vi thi gian ln ltl 30s,15s v 10s. Th t chn cu hi u tin cho i c ims thp nht t hai vng trc. Tt c thnh vin ca cc i tho lun ara kt qu ng nht. 14. Mi i c mt lt chn ngi sao may mnsau khi chn cu hi nhn i s imtng ng, tr li sai s tr s im . Nu i tr li sai th u tin mt trong cci cn li, tr li sai s b tr na s imtng ng. 15. 1 10303 628 910 124 57 1120 2030 30301020 2010 10 16. 01061890347025Pht biu no sau y khng ng khi so snh tnh chtha hc ca Nhm v CromA. Al v Cr b th ng ha trong dung dch H2SO4 c ngui.B. Al c tnh kh mnh hn Cr.C. Al v Cr u phn ng vi dung dch HCl theo cng t l vs mol.D. Al v Cr u bn trong khng kh v trong nc. 17. 01061890347025Chn pht biu ng:A. Cc kim loi Na, Ba, Be u tc dng vi nc iu kin thng.B. Kim loi Ce c dng ch to t bo quang in.C. Kim loi Mg c kiu mng tinh th lp phng tm din.D. Theo chiu tng dn ca in tch ht nhn, cc kim loi kim th(t Be n Ba) c nhit nng chy gim dn. 18. 01061890347025Dy no gm cc cht va tc dng c vi dung dchHCl, va tc dng vi dung dch AgNO3 :D. Hg, Na, Ca.A. Zn, Cu, Mg.B. Al, Fe, Cu.C. Fe, Ni, Sn. 19. 01061890347025Th t mt s cp oxi ha kh trong dy in ha nh sauMg2+/Mg , Fe2+/Fe , Cu2+/Cu , Fe3+/Fe2+ , Ag+/AgDy no gm cc cht, ion tc dng vi ion Fe3+ trong dung dch l:D. Mg, Fe2+, Ag.A. Mg, Fe, Cu.B. Fe, Cu, Ag+.C. Mg, Cu, Cu2+. 20. 1010100001102031627349180545Cho hn hp bt Al, Fe vo dung dch cha Cu(NO3)2v AgNO3. Sau khi phn ng xy ra hon ton, hnhp ti a kim loi thu c gm kim loi g? 21. 1010100001102031627349180545Cho bit s ging nhau ca lin kt ion v lin kt kim loi ? 22. 1010100001102031627349180545Gii thch hin tng th nghim: Ngm mt l Zn nh, tinhkhit trong dung dch HCl thy bt kh H2 thot ra chm v t.Nu nh thm v git dung dch CuSO4 thy bt kh xut hinnhiu v nhanh hn. 23. 1010100001102031627349180545Xc nh cc m v cc dng, tnh sut in ng ca pinin ha c ghp bi cp oxi ha kh sau:Cu2+/Cu v Ni2+/Ni0 = +0.342+/Bit 2+/0 = -0.26V 24. Cho 19.3g hn hp bt Cu v Zn c t l mol tng ng l1:2 vo dung dch cha 0.2 mol Fe2(SO4)3. Sau khi phn ngxy ra hon ton, thu c m gam kim loi. Cho bit gi trca m ?1231012345678910123456789 25. Nung nng 16.8 gam hn hp gm Au, Ag, Cu, Fe, Zn vimt lng d kh O2, n khi cc phn ng xy ra honton, thu c 23.2 g cht rn X. Th tch dung dch HCl 2Mva phn ng vi cht rn X l bao nhiu ?1231012345678910123456789 26. 1231012345678910123456789Nhng mt l kim loi M (ch c ha tr II trong hp cht) ckhi lng 50 gam vo 200ml dung dch AgNO3 1M cho nkhi phn ng xy ra hon ton. Lc dung dch, em c cnthu c 18.8 gam mui khan. Cho bit tn kim loi M ? 27. Th tch dung dch HNO3 1M long t nht cn dng hatan hon ton mt hn hp gm 0.15 mol Fe v 0.15 mol Cul bao nhiu ?Bit phn ng to cht kh duy nht l NO1231012345678910123456789