1. B mn: Ha hc 12 2. Mi t trong lp hc tng ng vi mt i, mi t trng cng c chn lm i trng. Cuc thi gm 3 vng v lut chi s c ph bin trc mi vng thi. Sau mi vng thi, im s ca mi i s c cng b. Chc cc em thi u thnh cng !!! LUT THI U 3. 0 00 0 I 1 I 2 I 3 I 4 VNG 3VNG 2VNG 1 KT QU V CH 4. Trong thi gian 60s, mi i phi tr li 5 cu hi ca chng trnh, mi cu tr li ng s tng ng vi 10 im. Tt c thnh vin ca cc i u c th tham gia vng u bng cch tho lun v a ra kt qu chnh xc nht. Nu cu hi kh c th b qua nhng khng c quay tr li. 5. 1 2 3 4 5 6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 Cho bit tn kim loi c khi lng ring ln nht ?Cho bit tn kim loi c cng ln nht ? Cho bit tnh cht ha hc c bn nht ca kim loi ? Qui tc no thng c dng xc nh chiu ca phn ng oxi ha kh ? Gii thch ti sao lm tinh khit mt loi Cu c ln tp cht l Al, Fe ngi ta phi ngm hn hp kim loi ny trong Cu(NO3)2 d ? 6. 1 2 3 4 5 6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 Cho bit tn kim loi c nhit nng chy thp nht ?Cho bit tn kim loi dn in tt nht ?Cho bit nguyn nhn gy nn nhng tnh cht vt l chung ca kim loi ? Trong cc nguyn t sau, nguyn t no l kim loi nhm IA: Al, Cu, Na, Fe, Fr, Sn, Rb C dung dch FeSO4 ln tp cht CuSO4. Hy nu mt phng php ha hc n gin loi c tp cht. 7. Cho bit tn kim loi c khi lng ring nh nht ?Cho bit tn kim loi c khi lng ring nh nht ? 1 2 3 4 5 6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 Cho bit thang o cng ph bin ca kim loi ? Cho bit sn phm chung no c to thnh khi kim loi phn ng c vi nc ? Cho bit tn kim loi c khi lng ring nh nht ? Cho bit trong nhm sau, kim loi no l nhng nguyn t s Rb, Hg, Sn, Al, Ba, K Cho bit tn kim loi c khi lng ring nh nht ? Gii thch cc hin tng sau: -Cho bt Fe vo dung dch CuSO4 th mu xanh ca dung dch nht dn. -Ngc li cho bt Cu vo dung dch Fe2(SO4)3 th dung dch tr nn xanh m. 8. 1 2 3 4 5 6059585756555453525150494847464544434241403938373635343332313029282726252423222120191817161514131211109876543210 Cho bit tn kim loi c khi lng ring nh nht ?Cho bit tn kim loi c nhit nng chy cao nht ?Cho bit tn kim loi c khi lng ring nh nht ?Cho bit kim loi no c tnh do cao nht?Cho bit tn kim loi c khi lng ring nh nht ? Cho bit trong cng iu kin, ion kim loi no trong nhm sau c tnh oxi ha mnh nht Fe2+, Cu2+,Sn2+, Ni2+ Cho bit tn kim loi c khi lng ring nh nht ? Cc kim loi no sau y c cng kiu mng tinh th lp phng tm khi: Na, Mg, K, Li, Ba, Ca, Sr Cho bit tn kim loi c khi lng ring nh nht ? Gii thch ti sao khi t ming vng hay bc trong khng kh th khi lng khng i nhng vi ming st hay ng th khi lng li i ? 9. Vng thi gm 3 cu hi, thi gian tr li l 15s sau khi kt thc cu hi. Cc i trnh by cu tr li vo bng. i no a ra cu tr li ng v theo th t tr li sm s c cc im tng ng 40, 30, 20, v 10. 10. Hy trnh by p n trong khi xem video Cho bit tn kim loi ang c nhc n? 11. Hy trnh by p n sau 15s khi xem xong video Vit qu trnh oxi ha kh xy ra cc dng v m trong phin Giavani sau: 00010203040506070809101112131415 12. Hy gii thch hin tng th nghim sau C 2 ng nghim ng dung dch sau: ng 1: dung dch HCl long ng 2: dung dch HNO3 c - Cho mt dy st vo ng nghim 1 th c hin tng si bt kh. - Cho mt dy st khc vo ng nghim 2 th khng c hin tng g. Sau tip tc a dy st vo ng nghim 1 cng khng c hin tng g. Hy gii thch hin tng trn v cho bit kh sinh ra ca phn ng trong ng nghim 1 l kh g ? 00010203040506070809101112131415 13. Mi i c ba lt chn ngu nhin cu hi c mc kh khc nhau tng ng vi cc mc im 30, 20 v 10 vi thi gian ln lt l 30s,15s v 10s. Th t chn cu hi u tin cho i c im s thp nht t hai vng trc. Tt c thnh vin ca cc i tho lun a ra kt qu ng nht. 14. Mi i c mt lt chn ngi sao may mn sau khi chn cu hi nhn i s im tng ng, tr li sai s tr s im . Nu i tr li sai th u tin mt trong cc i cn li, tr li sai s b tr na s im tng ng. 15. 10 20 30 10 1010 20 20 20 3030 301 9 63 117 4 5 8 1210 2 16. 0001020304050607080910 D. Al v Cr u bn trong khng kh v trong nc. Pht biu no sau y khng ng khi so snh tnh cht ha hc ca Nhm v Crom A. 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 v s mol. 17. 0001020304050607080910 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. Chn 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. 18. 0001020304050607080910 D. Hg, Na, Ca. Dy no gm cc cht va tc dng c vi dung dch HCl, va tc dng vi dung dch AgNO3 : A. Zn, Cu, Mg. B. Al, Fe, Cu. C. Fe, Ni, Sn. 19. 0001020304050607080910 D. Mg, Fe2+, Ag. Th t mt s cp oxi ha kh trong dy in ha nh sau Mg2+/Mg , Fe2+/Fe , Cu2+/Cu , Fe3+/Fe2+ , Ag+/Ag Dy no gm cc cht, ion tc dng vi ion Fe3+ trong dung dch l: A. Mg, Fe, Cu. B. Fe, Cu, Ag+. C. Mg, Cu, Cu2+. 20. 00010203040506070809101112131415 Cho hn hp bt Al, Fe vo dung dch cha Cu(NO3)2 v AgNO3. Sau khi phn ng xy ra hon ton, hn hp ti a kim loi thu c gm kim loi g? 21. 00010203040506070809101112131415 Cho bit s ging nhau ca lin kt ion v lin kt kim loi ? 22. 00010203040506070809101112131415 Gii thch hin tng th nghim: Ngm mt l Zn nh, tinh khit 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 hin nhiu v nhanh hn. 23. 00010203040506070809101112131415 Xc nh cc m v cc dng, tnh sut in ng ca pin in ha c ghp bi cp oxi ha kh sau: Cu2+/Cu v Ni2+/Ni Bit 2+/ 0 = +0.34 2+/ 0 = -0.26V 24. Cho 19.3g hn hp bt Cu v Zn c t l mol tng ng l 1:2 vo dung dch cha 0.2 mol Fe2(SO4)3. Sau khi phn ng xy ra hon ton, thu c m gam kim loi. Cho bit gi tr ca m ? 3029282726252423222120191817161514131211109876543210 25. Nung nng 16.8 gam hn hp gm Au, Ag, Cu, Fe, Zn vi mt lng d kh O2, n khi cc phn ng xy ra hon ton, thu c 23.2 g cht rn X. Th tch dung dch HCl 2M va phn ng vi cht rn X l bao nhiu ? 3029282726252423222120191817161514131211109876543210 26. Nhng mt l kim loi M (ch c ha tr II trong hp cht) c khi lng 50 gam vo 200ml dung dch AgNO3 1M cho n khi phn ng xy ra hon ton. Lc dung dch, em c cn thu c 18.8 gam mui khan. Cho bit tn kim loi M ? 3029282726252423222120191817161514131211109876543210 27. Th tch dung dch HNO3 1M long t nht cn dng ha tan hon ton mt hn hp gm 0.15 mol Fe v 0.15 mol Cu l bao nhiu ? Bit phn ng to cht kh duy nht l NO 3029282726252423222120191817161514131211109876543210