Bai 5. Bai Tap an Mon Va Bao Ve Kim Loai

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Kha hcLTH mn Ha Thy Ngc S n mn kim loi

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S N MN KIM LOIBI TP T LUYN

Cu 1:Pht biu no sau y l khng ng:A.n mn kim loi l s hu hoi kim loi v hp kim di tc dng ca mi trng xung quanh.B.n mn kim loi l mt qu trnh ho hc trong kim loi b n mn bi cc axt trong mi trng

khng kh.

C.Trong qu trnh n mn, kim loi b oxi ho thnh ion ca n .D.n mn kim loi c chia lm hai dng: n mn ho hc v n mn in ho.

Cu 2:Loi phn ng ha hc xy ra trong s n mn kim loi l:A.Phn ng th. B.Phn ng oxi ha kh.C.Phn ng phn hy. D.Phn ng ha hp.

Cu 3:Pht biu no sau y l ng khi ni v n mn ho hc:A.n mn ho hc khng lm pht sinh dng in.B.n mn ho hc khng phi phn ng oxi ha kh.C.Kim loi tinh khit s khng b n mn ho hc.D.V bn cht, n mn ho hc cng l mt dng ca n mn in ho.

Cu 4:Cho vin bi Fe vo ng nghim ng dung dch HCl, st b n mn:A.nhanh dn. B.chm dn.C.tc khng i. D.khng xc nh c.

Cu 5:Kim loi no sau y c kh nng to ra mng oxit bo v khng b oxi ha ngoi khng khm:

A.Al. B.Fe. C.Na. D.Ca.Cu 6:Mt s ho cht c trn ngn t c khung bng kim loi. Sau 1 thi gian, ngi ta thy khungkim loi b g. Ho cht c kh nng gy ra hin tng trn l:

A.Ancol etylic. B.Dy nhm. C.Du ho. D.Axit clohiric.Cu 7:iu kin xy ra s n mn in ha hc l:

A.Cc in cc phi cng tip xc vi dung dch cht in ly.B.Cc in cc phi tip xc vi nhau.C.Cc in cc phi l nhng cht khc nhau.

D.C 3 iu kin trn.Cu 8:Trong n mn in ha, xy ra:A.S oxi ha cc dng.B.s oxi ha cc dng v s kh cc m.C.S kh cc m.D.S oxi ha cc m v s kh cc dng.

Cu 9:Bn cht ca s n mn in ho l:A.Cc qu trnh oxi ho - kh xy ra trn b mt cc in cc .B.Qu trnh oxi ho kim loi .C.Qu trnh kh kim loi v oxi ho ion H+.D.Qu trnh oxi ho kim loi cc dng v oxi ho ion H+ cc m.

Cu 10:S khc nhau trong bn cht ca 2 hin tng n mn kim loi l:

A.S pht sinh dng in.B.Qu trnh oxi ha kh.C.Kim loi mt electron to ra ion dng.D.S ph hy kim loi.

Cu 11: vt bng gang trong khng kh m, vt b n mn theo kiu:A.n mn ha hc.B.n mn in ho: Fe l cc dng, C l cc m.C.n mn in ho: Al l cc dng, Fe l cc m.D.n mn in ho: Fe l cc m, C l cc dng.

Cu 12:Mt vt bng hp kim Fe - Cu trong mi trng in ha th vt b n mn in ha. Ti ccdng xy ra qu trnh:

A.Oxi ha Fe Fe2++ 2e. B.Kh Cu2++ 2eCu.

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Kha hcLTH mn Ha Thy Ngc S n mn kim loi

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C.Oxi ha 2H++ 2e H2. D.Kh 2H++ 2.1e H2.

Cu 13:Cho bt st vo dung dch H2SO4long sau thm tip vi git dung dch CuSO4. Hin tngquan st thy l:

A.Bt kh bay ln t v chm hn lc u.B.Kh ngng thot ra (do Cu bao quanh Fe).C.Bt kh bay ln nhanh v nhiu hn lc u.D.Dung dch khng chuyn mu.

Cu 14:Mt si dy Cu ni vi mt si dy Fe ngoi khng kh m, sau mt thi gian c hin tngA.Dy Fe v dy Cu cng b t . B. ch ni, dy Fe b mn v t .C. ch ni, dy Cu b mn v t. D.Khng c hin tng g .

Cu 15:Cho mt thanh Al tip xc vi mt thanh Zn trong dung dch HCl, s quan st c hin tng:A.Thanh Al tan, bt kh H2thot ra t thanh Zn.B.Thanh Zn tan, bt kh H2thot ra t thanh Al.C.C 2 thanh cng tan v bt kh H2thot ra t c 2 thanh.D.Thanh Al tan trc, bt kh H2thot ra t thanh Al.

Cu 16:Mt l Al c ni vi mt l Zn mt u, u cn li ca 2 thanh kim loi u c nhngtrong dch mui n. Ti ch ni ca 2 thanh kim loi s xy ra qu trnh:

A.Ion Zn2+thu thm 2e to Zn. B. Ion Al3+thu thm 3e to Al.C.Electron di chuyn t Al sang Zn. D.Electron di chuyn t Zn sang Al.

Cu 17:Trng hp no di y kim loi b n mn in ho:A.Cho kim loi Zn vo dung dch HCl.B.Thp (cha C) trong khng kh m.C. t dy Fe trong kh O2.D.Cho kim loi Cu vo dung dch HNO3long.

Cu 18:C 4 dung dch ring bit: a) HCl, b) CuCl2, c) FeCl3, d) HCl c ln CuCl2. Nhng vo mi dungdch mt thanh Fe nguyn cht. S trng hp xut hin n mn in ho l:

A. 0. B. 1. C. 2. D. 3.(Trch thi tuyn sinh H C khi B 2007)

Cu 19:S trng hp xut hin n mn in ho trong bn th nghim sau l:- TN1: Cho thanh Fe vo dung dch FeCl3- TN2: Cho thanh Fe vo dung dch CuSO4

- TN3: Cho thanh Cu vo dung dch FeCl3- TN4: Cho thanh Fe tip xc vi thanh Cu ri cho vo dung dch HCl.A. 1. B.2. C. 4. D. 3.

(Trch thi tuyn sinh H C khi B 2008)Cu 20:Khi cc cp kim loi di y ngoi khng kh m, trng hp no Fe b mn:

A. Al Fe B. Cr Fe C. Cu Fe D. Zn FeCu 21:Cho cc hp kim sau: Cu-Fe (I); Zn-Fe (II); Fe-C (III); Sn-Fe (IV). Khi tip xc vi dung dchcht in li th cc hp kim m trong Fe u b n mn trc l :

A.I, II v III. B.I, II v IV. C.I, III v IV. D.II, III v IV.(Trch thi tuyn sinh H C khi A 2009)

Cu 22:Cho cc cp kim loi nguyn cht tip xc trc tip vi nhau: Fe v Pb; Fe v Zn; Fe v Sn; Fe vNi. Khi nhng cc cp kim loi trn vo dung dch axit, s cp kim loi trong Fe b ph hy trc l:

A.4 B.1 C.2 D.3(Trch thi tuyn sinh Cao ng 2007)

Cu 23:Mt chic cha kho lm bng hp kim Cu-Fe b ri xung y ging. Sau mt thi gian chiccha kho s:

A.B n mn ho hc.B.B n mn in ho.C.Khng b n mn.D.n mn in ho hoc ho hc tu theo lng Cu-Fe c trong cha kho .

Cu 24:C 2 chic tha st nh nhau, mt chic gi nguyn cn mt chic b vn cong cng t trong iukin khng kh m nh nhau. Hin tng xy ra l:

A.C 2 chic tha u khng b n mn.

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Kha hcLTH mn Ha Thy Ngc S n mn kim loi

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B.C 2 chic tha u b n mn vi tc nh nhau.C.Chic tha cong b n mn nhiu hn.D.Chic tha cong b n mn t hn.

Cu 25:Pht biu no sau y l khngng:A.G st c cng thc ho hc l Fe3O4. xH2O.B.G ng c cng thc ho hc l Cu(OH)2. CuCO3.C.Cc dng bng st thng b n mn do khng c ch to t Fe tinh khit m thng c ln cc

tp cht khc.D.Trong qu trnh to thnh g Fe, ant xy ra qu trnh: O2 + 2H2O + 4e4OH

Cu 26:Bit rng ion Pb2+trong dung dch oxi ha c Sn. Khi nhng hai thanh kim loi Pb v Sn cni vi nhau bng dy dn in vo mt dung dch cht in li th

A.Pb v Sn u b n mn in ho. B.Pb v Sn u khng b n mn in ho.C.Ch c Pb b n mn in ho. D.Ch c Sn b n mn in ho.

(Trch thi tuyn sinh H C khi A 2008)Cu 27:Cc vt dng bng st trong i sng u khng phi l st nguyn cht. l nguyn nhn dnn:

A.Cc vt dng trn b n mn theo c ch n mn in ha.B.Cc vt dng trn b n mn theo c ch n mn ha hc.C.Cc vt dng trn d b g st khi tip xc vi dung dch in li.

D.A, C u ng.Cu 28:Nhng kh no sau y trong kh quyn l nguyn nhn gy ra s n mn kim loi:A.Kh oxi. B.Kh cacbonic. C.Kh nit. D.Kh argon.

Cu 29:C s ha hc ca cc phng php chng n mn kim loi l:A.Ngn cn v hn ch qu trnh oxi ho kim loi.B.Cch li kim loi vi mi trng.C.Dng hp kim chng g.D.Dng phng php in ho.

Cu 30:Ngi ta gn tm Zn vo v ngoi ca tu thu phn chm trong nc bin :A.V tu c chc hn.B.Chng n mn bng cch dng cht chng n mn.C.Chng n mn kim loi bng phng php in ho.

D.Chng n mn kim loi bng phng php cch li kim loi vi mi trng.Cu 31:C mt thu th lm ri mt ng 50 xu lm bng Zn xung y tu v v tnh qun khng nhtli ng xu . Hin tng xy ra sau l:

A.ng xu ri ch no vn cn nguyn ch .B.ng xu bin mt.C.y tu b thng dn lm con tu b m.D.ng xu nng hn trc nhiu ln.

Cu 32: bo v ni hi (Supde) bng thp khi b n mn, ngi ta c th lt nhng kim loi no sauy vo mt trong ca ni hi.

A.Zn hoc Mg. B.Zn hoc Cr. C.Ag hoc Mg. D.Pb hoc Pt.Cu 33:Trn ca cc p nc bng thp thng thy c gn nhng l Zn mng. Phng php chng nmn c s dng trong trng hp ny l:

A.Dng hp kim chng g.B.Cch ly kim loi vi mi trng.C.Phng php bin i ho hc lp b mt.D.Phng php in ho.

Cu 34:Kt lun no sau y khngng:A.Cc thit b my mc bng kim loi tip xc vi hi nc nhit cao c kh nng b n mn ho

hc.B.Ni thanh Zn vi v tu thu bng thp th v tu thu s c bo v.C. vt bng thp ra ngoi khng kh m th vt s b n mn in ho.D.Mt ming v hp lm bng st ty (st trng thic) b xy xt tn bn trong, trong khng kh

m th Sn s b n mn trc.

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Kha hcLTH mn Ha Thy Ngc S n mn kim loi

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Cu 35:Gi cho b mt kim loi lun lun sch, khng c bn t bm vo l mt bin php bo vkim loi khng b n mn. Phng php chng n mn no dng y l:

A.Cch li kim loi vi mi trng.B.Dng phng php in ho.C.Dng phng php bin i ho hc lp b mt.D.Gi cho kim loi nguyn cht.

Gio vin: V Khc Ngc

Ngun: Hocmai.vn