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<blockquote data-quote="hangquyet" data-source="post: 21960" data-attributes="member: 7514">[FONT=.VnTime]C©u 1: Etan vµ eten lµ hai khÝ chØ chøa cacbon vµ hi®ro. Mét mÉu etan cã 4,53 g hi®ro kÕt hîp víi 18,0 g cacbon. Mét mÉu eten cã 7,25 g hi®ro kÕt hîp víi 43,20 g cacbon.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; KLNT: C = 12, H = 1,01.[/FONT][FONT=.VnTime]Tõ sè liÖu nµy, c«ng thøc thùc nghiÖm ( cã tØ lÖ nguyªn ®¬n gi¶n nhÊt) cña hai hîp chÊt etan vµ eten theo thø tù lµ:[/FONT][FONT=.VnTime]A : C2H6, CH2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B : CH3, C2H4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C : C2H6, C2H4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D : CH3, CH2[/FONT][FONT=.VnTime]C©u 2: Khi trén hai dung dÞch víi nhau, cã thÓ t¹o thµnh chÊt r¾n. XÐt b¶ng c¸c dung dÞch ®&amp;shy;îc trén víi nhau. DÊu + cã nghÜa lµ t¹o chÊt r¾n, dÊu – nghÜa lµ kh«ng t¹o ®&amp;shy;îc.[/FONT][FONT=.VnTime]Dung dÞch[/FONT][FONT=.VnTime]Clorua[/FONT][FONT=.VnTime]Sunfat[/FONT][FONT=.VnTime]Cacbonat[/FONT][FONT=.VnTime]Nitrat[/FONT][FONT=.VnTime]B¹c[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]Bari[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]§ång[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]Kali[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]Ch×[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]Stronti[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]+[/FONT][FONT=.VnTime]-[/FONT][FONT=.VnTime]Khi thªm dung dÞch S vµo dung dÞch clorua, sunfat vµ nitrat kh«ng thÊy t¹o chÊt r¾n. Tuy nhiªn cã t¹o thµnh chÊt r¾n khi thªm dung dÞch S vµo dung dÞch cacbonat. V× vËy dung dÞch S cã thÓ lµ dung dÞch:[/FONT][FONT=.VnTime]A : Bari nitrat&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; B : B¹c nitrat&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C : §ång nitrat&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D : Kali nitrat&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C©u 3: C¸c nguyªn tè d&amp;shy;íi ®©y ®Òu t¹o clorua. Chän trong c¸c danh s¸ch ghi d&amp;shy;íi ®©y nh÷ng nguyªn tè nµo chØ t¹o hîp chÊt ion cña clorua.[/FONT][FONT=.VnTime]A : Canxi, Natri, §ång.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C : Ph«tpho, L&amp;shy;u huúnh, Cacbon[/FONT][FONT=.VnTime]B : Kali, Ph«tpho, Cacbon&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D : Magiª, Ph«tpho, L&amp;shy;u huúnh[/FONT][FONT=.VnTime]C©u 4: CÆp chÊt nµo d&amp;shy;íi ®©y cã thÓ ph¶n øng ®Ó chØ t¹o muèi vµ n&amp;shy;íc?[/FONT][FONT=.VnTime]A : Magie vµ axit sunfuric&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C : B¹c nitrat vµ axit clohi®ric[/FONT][FONT=.VnTime]B : Natri cacbonat vµ axit sunfuric&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D : Kali hi®roxit vµ axit&nbsp; nitric[/FONT][FONT=.VnTime]C©u 5: Nhãm nµo d&amp;shy;íi ®©y chØ chøa baz¬?[/FONT][FONT=.VnTime]A : Magie hi®roxit, ®ång hi®roxit, cacbon ®ioxit.&nbsp; &nbsp; C : L&amp;shy;u huúnh ®ioxit, ch× oxit, cacbon ®ioxit[/FONT][FONT=.VnTime]B : Canxi hi®roxit, ®ång oxit, natri oxit&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D : Ph«tpho pentoxit, clo(I) oxit, nit¬ ®ioxit[/FONT][FONT=.VnTime]C©u 6: N&amp;shy;íc biÓn cã chøa kho¶ng 3,4% khèi l&amp;shy;îng lµ muèi tan. ChØ cã 9 lo¹i ion t¹o thµnh trªn 99% chÊt tan trong n&amp;shy;íc biÓn.[/FONT][FONT=.VnTime]ChÊt tan v« c¬ trong n&amp;shy;íc biÓn[/FONT][FONT=.VnTime]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; PhÇn tr¨m&nbsp; [/FONT][FONT=.VnTime]Ion&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ( theo khèi l&amp;shy;îng)[/FONT][FONT=.VnTime]Na+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 30,61[/FONT][FONT=.VnTime]Sr2+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0,04[/FONT][FONT=.VnTime]Mg2+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3,69[/FONT][FONT=.VnTime]Ca2+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 1,16[/FONT][FONT=.VnTime]K+&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 1,10[/FONT][FONT=.VnTime]HCO3-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0,41[/FONT][FONT=.VnTime]Br-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0,19[/FONT][FONT=.VnTime]Cl-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 55,04[/FONT][FONT=.VnTime]SO42-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 7,68[/FONT][FONT=.VnTime]PhÇn tr¨m khèi l&amp;shy;îng cña muèi natri clorua hoµ tan lµ:[/FONT][FONT=.VnTime]A : 3,4%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; B : 99,99%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C : 85,65%&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D : 30,61%[/FONT][FONT=.VnTime]C©u 7: C¬ quan cung cÊp n&amp;shy;íc xö lý n&amp;shy;íc b»ng nhiÒu c¸ch kh¸c nhau, trong ®ã cã thÓ thªm clo vµ phÌn kÐp nh«m kali ( K2SO4.Al2(SO4)3.24H2O ). V× sao ph¶i thªm phÌn kÐp nh«m kali vµo n&amp;shy;íc?[/FONT][FONT=.VnTime]A : §Ó lµm n&amp;shy;íc trong&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C : §Ó khö trïng n&amp;shy;íc[/FONT][FONT=.VnTime]B : §Ó lo¹i bá l&amp;shy;îng d&amp;shy; ion florua&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D : §Ó lo¹i bá c¸c rong, t¶o[/FONT][FONT=.VnTime]C©u 8: Decan lµ mét ankan cã c«ng thøc C10H22. Undecan, ®odecan, tridecan vµ tetradecan lµ tªn cña c¸c ankan lÇn l&amp;shy;ît cã 11, 12, 13 vµ 14 cacbon. C«ng thøc ph©n tö cña pentadecan ph¶i lµ:[/FONT][FONT=.VnTime]A : C5H12&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B : C6H15&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C : C15H30&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D : C15H32[/FONT][FONT=.VnTime]C©u 9: Propan ch¸y trong oxi t¹o cacbon ®ioxit vµ h¬i n&amp;shy;íc theo ph&amp;shy;¬ng tr×nh sau:[/FONT][FONT=.VnTime]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; 5O2(khÝ)&nbsp; &nbsp; +&nbsp; &nbsp;&nbsp; C3H8(khÝ)&nbsp; &nbsp; ---&gt;&nbsp;&nbsp; 3CO2(khÝ)&nbsp;&nbsp; +&nbsp; &nbsp; 4H2O(khÝ)[/FONT][FONT=.VnTime]Trong ®iÒu kiÖn nhiÖt ®é vµ ¸p suÊt kh«ng ®æi:[/FONT][FONT=.VnTime]A: 1 lÝt O2 ph¶n øng víi 5 lÝt C3H8&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: 1 lÝt H2O ®&amp;shy;îc t¹o tõ 5/4 lÝt O2[/FONT][FONT=.VnTime]B: 1 lÝt O2 ph¶n øng víi 3/5 lÝt CO2&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: 1 lÝt H2O ®&amp;shy;îc t¹o tõ 3 lÝt C3H8[/FONT][FONT=.VnTime]C©u 10: XÐt c¸c sè liÖu sau cña mét sè ankan:[/FONT][FONT=.VnTime]Ankan[/FONT][FONT=.VnTime]NhiÖt ®é s«i( 0C)[/FONT][FONT=.VnTime]Ankan[/FONT][FONT=.VnTime]NhiÖt ®é s«i( 0C)[/FONT][FONT=.VnTime]Metan[/FONT][FONT=.VnTime]Etan[/FONT][FONT=.VnTime]Propan[/FONT][FONT=.VnTime]Butan[/FONT][FONT=.VnTime]Pentan[/FONT][FONT=.VnTime]-161,6[/FONT][FONT=.VnTime]-88,6[/FONT][FONT=.VnTime]-42,1[/FONT][FONT=.VnTime]-0,5[/FONT][FONT=.VnTime]36,1[/FONT][FONT=.VnTime]Hexan[/FONT][FONT=.VnTime]Heptan[/FONT][FONT=.VnTime]Octan[/FONT][FONT=.VnTime]Nonan[/FONT][FONT=.VnTime]§ecan[/FONT][FONT=.VnTime]68,7[/FONT][FONT=.VnTime]98,4[/FONT][FONT=.VnTime]125,7[/FONT][FONT=.VnTime]150,8[/FONT][FONT=.VnTime]174,1[/FONT][FONT=.VnTime]Nh÷ng ankan nµo trong b¶ng lµ chÊt khÝ ë nhiÖt ®é phßng?[/FONT][FONT=.VnTime]A: Decan, nonan, octan, heptan, hexan vµ pentan v× nhiÖt ®é s«i cña chóng lín h¬n nhiÖt ®é phßng.[/FONT][FONT=.VnTime]B: Butan, propan, etan vµ metan v× nhiÖt ®é s«i cña chóng nhá h¬n nhiÖt ®é phßng.[/FONT][FONT=.VnTime]C: Metan vµ etan v× chóng lµ nh÷ng ankan nhÑ h¬n kh«ng khÝ[/FONT][FONT=.VnTime]D: Etan, butan vµ propan.[/FONT][FONT=.VnTime]C©u 11: Tªn chÊp nhËn ®&amp;shy;îc cho chÊt h÷u c¬ d&amp;shy;íi ®©y ph¶i lµ:[/FONT][FONT=.VnTime][/FONT][FONT=.VnTime]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; CH3 [/FONT][FONT=.VnTime]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [/FONT][FONT=.VnTime][/FONT][FONT=.VnTime][/FONT][FONT=.VnTime][/FONT][FONT=.VnTime]&nbsp; &nbsp; &nbsp; &nbsp; CH3&amp;shy;&nbsp; &nbsp; &nbsp;&nbsp; CH2&nbsp; &nbsp; &nbsp; C&nbsp; &nbsp; &nbsp; &nbsp; CH3&amp;shy;[/FONT][FONT=.VnTime][/FONT][FONT=.VnTime][/FONT][FONT=.VnTime][/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime]&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; CH3[/FONT][FONT=.VnTime]A: 2,2- ®imetylbutan&nbsp; &nbsp;&nbsp; B: trietylpropan&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: 2,2-®imetylpropan&nbsp; &nbsp; &nbsp; &nbsp; D: 3,3-dimetylpropan[/FONT][FONT=.VnTime]C©u 12: Khi thæi kh«ng khÝ vµo n&amp;shy;íc nguyªn chÊt, dung dÞch thu ®&amp;shy;îc cã tÝnh axit. KhÝ nµo sau ®©y g©y nªn tÝnh axit ®ã?[/FONT][FONT=.VnTime]A: Cacbon ®ioxit&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B: Hi®ro&nbsp; &nbsp; &nbsp; &nbsp; C: Oxi&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: Nit¬[/FONT][FONT=.VnTime]C©u 13: Y lµ dung dÞch H2SO4 vµ X lµ dung dÞch NaOH 0,1200M. Víi 25,00ml H2SO4 th× cÇn ®Õn 38,14ml NaOH ®Ó ®¹t ®iÓm t&amp;shy;¬ng ®&amp;shy;¬ng. Nång ®é cña dung dÞch H2SO4 lµ:[/FONT][FONT=.VnTime]A: 0,09154M&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B: 0,1831M&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C: 5,462M&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D: 10,92M[/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime] [/FONT][FONT=.VnTime][/FONT][FONT=.VnTime]C©u 14:Muèi lµ nh÷ng chÊt ®&amp;shy;îc t¹o thµnh tõ sù liªn kÕt mét thµnh phÇn kim lo¹i víi mét thµnh phÇn cã tÝnh axit nh&amp;shy; sù biÓu diÔn trong b¶ng bªn d&amp;shy;íi. Chóng cã thÓ tan trong n&amp;shy;íc(T) hay kh«ng tan trong n&amp;shy;íc (K)[/FONT][FONT=.VnTime][/FONT][FONT=.VnTime]Bari[/FONT][FONT=.VnTime]Ch×[/FONT][FONT=.VnTime]Kali[/FONT][FONT=.VnTime]B¹c[/FONT][FONT=.VnTime]Sunfat[/FONT][FONT=.VnTime]K[/FONT][FONT=.VnTime]K[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]Clorua[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]K[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]K[/FONT][FONT=.VnTime]Nitrat[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]Ph«tphat[/FONT][FONT=.VnTime]K[/FONT][FONT=.VnTime]K[/FONT][FONT=.VnTime]T[/FONT][FONT=.VnTime]K[/FONT][FONT=.VnTime]Theo b¶ng trªn th× ph¸t biÓu nµo sau ®©y lµ ®óng.[/FONT][FONT=.VnTime]A: TÊt c¶ c¸c muèi ch× lµ c¸c chÊt kh«ng tan trong n&amp;shy;íc.[/FONT][FONT=.VnTime]B: PhÇn lín muèi ph«tphat th× hoµ tan ®&amp;shy;îc trong n&amp;shy;íc h¬n lµ kh«ng hoµ tan[/FONT][FONT=.VnTime]C: TÊt c¶ c¸c muèi nitrat vµ tÊt c¶ c¸c muèi kali th× tan trong n&amp;shy;íc.[/FONT][FONT=.VnTime]D: PhÇn lín muèi sunfat lµ kh«ng tan trong n&amp;shy;íc h¬n lµ tan trong n&amp;shy;íc.[/FONT][FONT=.VnTime]C©u 15: Ph¸t biÓu nµo sau ®©y m« t¶ mét chÊt ®iÖn li yÕu chÝnh x¸c nhÊt?[/FONT][FONT=.VnTime]A: Dung dÞch lo·ng.[/FONT][FONT=.VnTime]B: ChÊt kh«ng tan trong n&amp;shy;íc.[/FONT][FONT=.VnTime]C: ChÊt chñ yÕu gåm c¸c ph©n tö, chØ chøa vµi ion.[/FONT][FONT=.VnTime]D: ChÊt ph©n li thµnh ion ë thÓ láng hay nãng ch¶y chø kh«ng ph©n li trong dung dÞch.[/FONT][FONT=.VnTime]C©u 16: Mét häc sinh líp 11 lµm ®æ mét Ýt amoni¨c ra sµn bÕp. Dïng chÊt nµo sau ®©y cã s½n trong nhµ ®Ó trung hoµ amoni¨c?[/FONT][FONT=.VnTime]A: GiÊm ¨n( axit axetic)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: X« ®a( natri cacbonat)[/FONT][FONT=.VnTime]B: Muèi ¨n( natri clorua)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: Bét tÈy tr¾ng( canxi hipoclorit)[/FONT][FONT=.VnTime]C©u 17: Hoµ tan 0,67 g Kali dicromat ( K2Cr2O7) vµo mét lÝt n&amp;shy;íc ®Ó ®iÒu chÕ dung dÞch W.[/FONT][FONT=.VnTime]Dung dÞch W ®&amp;shy;îc pha lo·ng m&amp;shy;êi lÇn víi n&amp;shy;íc ®Ó ®&amp;shy;îc dung dÞch X.[/FONT][FONT=.VnTime]Dung dÞch X ®&amp;shy;îc pha lo·ng m&amp;shy;êi lÇn víi n&amp;shy;íc ®Ó ®&amp;shy;îc dung dÞch Y.[/FONT][FONT=.VnTime]TÝnh nång ®é g/l cña dung dÞch Y? ( Cho K = 39,1; Cr = 52,0; O = 16,0).[/FONT][FONT=.VnTime]A: 0,0023&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B: 0,067&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: 0,0067&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: 0,00067[/FONT][FONT=.VnTime]C©u 18: Hoµ tan 20,0 g natri hidroxit r¾n vµo kho¶ng 100ml n&amp;shy;íc råi thªm n&amp;shy;íc ®Õn ®óng 250ml th× dung dÞch thu ®&amp;shy;îc cã nång ®é mol b»ng bao nhiªu? ( Cho Na = 23, H = 1, O = 16)[/FONT][FONT=.VnTime]A: 0,125 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B:&nbsp; 0,50 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C: 5,0 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D: 2,0 mol.l-[/FONT][FONT=.VnTime]C©u 19: Sè liÖu ph©n tÝch trªn nh·n cña mét lo¹i n&amp;shy;íc kho¸ng ®ãng chai lµ:[/FONT][FONT=.VnTime]Ca2+[/FONT][FONT=.VnTime]80ppm[/FONT][FONT=.VnTime]Mg2+[/FONT][FONT=.VnTime]15ppm[/FONT][FONT=.VnTime]K+[/FONT][FONT=.VnTime]4ppm[/FONT][FONT=.VnTime]Na+[/FONT][FONT=.VnTime]6ppm[/FONT][FONT=.VnTime]SO42-[/FONT][FONT=.VnTime]85ppm[/FONT][FONT=.VnTime]1ppm = mét phÇn triÖu = 1mg chÊt tan trong 1 lÝt dung dÞch.[/FONT][FONT=.VnTime]Cã bao nhiªu gam canxi trong chai n&amp;shy;íc kho¸ng 1,25 lÝt?[/FONT][FONT=.VnTime]A: 80,0 g&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B: 0,080 g&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: 8,00 g&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: 0,100 g[/FONT][FONT=.VnTime]C©u 20: C¸ cÇn cã oxi ®Ó t¨ng tr&amp;shy;ëng tèt. Chóng kh«ng thÓ t¨ng tr&amp;shy;ëng tèt nÕu n&amp;shy;íc qu¸ Êm. Mét lÝ do cho hiÖn t&amp;shy;îng trªn lµ:[/FONT][FONT=.VnTime]A: B¬i léi trong n&amp;shy;íc Êm cÇn nhiÒu cè g¾ng h¬n.[/FONT][FONT=.VnTime]B: Ph¶n øng ho¸ häc x¶y ra nhanh h¬n khi nhiÖt ®é t¨ng.[/FONT][FONT=.VnTime]C: Oxi hoµ tan kÐm h¬n trong n&amp;shy;íc Êm.[/FONT][FONT=.VnTime]D: Trong n&amp;shy;ín Êm sÏ t¹o ra nhiÒu cacbon ®ioxit h¬n.[/FONT][FONT=.VnTime]C©u 21: Mét dung dÞch natri clorua trong n&amp;shy;íc cã chøa 15,3% natri clorua theo khèi l&amp;shy;îng. NÕu cho bay h¬i hoµn toµn 437 gam dung dÞch cho ®Õn kh« th× cßn l¹i bao nhiªu gam natri clorua? ( Cho Na = 23, Cl = 35,5)[/FONT][FONT=.VnTime]A: 422 gam&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B: 352 gam&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C: 66,9 gam&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: 8,9 gam[/FONT][FONT=.VnTime]C©u 22: Khèi l&amp;shy;îng cña mét mol MgSO4.7H2O lµ 246,5 g. Khi hoµ tan 12,3 g MgSO4.7H2O trong 87,7 g n&amp;shy;íc, thu ®&amp;shy;îc dung dÞch cã khèi l&amp;shy;îng riªng lµ 1,06 g.ml- t¹i 200C. Nång ®é mol cña dung dÞch trªn lµ bao nhiªu?[/FONT][FONT=.VnTime]A: 0,49 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; B: 0,53 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: 0,60 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D: 0,62 mol.l-.[/FONT][FONT=.VnTime]C©u 23: Cµ phª hoµ tan ®&amp;shy;îc ®iÒu chÕ b»ng ph&amp;shy;¬ng ph¸p ®«ng – kh«. Cµ phª võa ®iÒu chÕ ®&amp;shy;îc lµm ®«ng l¹nh råi ®Æt vµo trong mét b×nh chøa ®Ó rót hÕt kh«ng khÝ, t¹o ch©n kh«ng. Trong ch©n kh«ng, phÇn n&amp;shy;íc ®¸ trong dung dÞch cµ phª ®«ng l¹nh sÏ th¨ng hoa trong khi cµ phª ®· ®«ng kh« cßn l¹i nguyªn vÑn. ¦u ®iÓm cña ph&amp;shy;¬ng ph¸p nµy lµ c¸c ph©n tö mïi trong cµ phª kh«ng bÞ ph¸ huû trong qu¸ tr×nh ®un nÊu kÐo dµi vµ cµ phª chÕ t¹o theo c¸ch nµy cã thÓ ®Ó ®&amp;shy;îc l©u h¬n.[/FONT][FONT=.VnTime]ThuËt ng÷&nbsp; th¨ng hoa cã nghÜa sù biÕn ®æi ®· x¶y ra lµ tõ:[/FONT][FONT=.VnTime]A: r¾n sang láng&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; B: r¾n sang h¬i&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: láng sang h¬i&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D: h¬i sang r¾n.[/FONT][FONT=.VnTime]C©u 24: Tr&amp;shy;íc khi ®o ®iÖn t©m ®å (ECG) cho ng&amp;shy;êi bÖnh, ®Çu dß cña ECG th&amp;shy;êng ®&amp;shy;îc phñ bªn ngoµi b»ng mét chÊt gi÷ Èm cã chøa natri clorua (NaCl). §iÒu nµy ®&amp;shy;îc sö dông dùa trªn tÝnh chÊt nµo cña natri clorua?[/FONT][FONT=.VnTime]A: NaCl cã ®é nãng ch¶y cao.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: NaCl dÉn ®iÖn trong dung dÞch.[/FONT][FONT=.VnTime]B: NaCl dÔ tan trong n&amp;shy;íc.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: CÊu t¹o tinh thÓ cña NaCl.[/FONT][FONT=.VnTime]C©u 25: Mét hi®rocacbon ë thÓ khÝ cã chøa 85,7% cacbon vµ 14,3% hi®ro theo khèi l&amp;shy;îng. C«ng thøc nµo d&amp;shy;íi ®©y lµ phï hîp?[/FONT][FONT=.VnTime]1- CH4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 2- C2H4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3- C3H6[/FONT][FONT=.VnTime]A: ChØ c«ng thøc 1.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C: C«ng thóc 1 vµ 2.[/FONT][FONT=.VnTime]B: ChØ c«ng thøc 3.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D: C«ng thøc 2 vµ 3.[/FONT][FONT=.VnTime]C©u 26: Thªm 1 mol axit axetic vµo 1 lÝt n&amp;shy;íc nguyªn chÊt. Mét hay nh÷ng ph¸t biÓu nµo d&amp;shy;íi ®©y ®óng?[/FONT][FONT=.VnTime][FONT=.VnTime]1-[/FONT]&nbsp; &nbsp;&nbsp; [/FONT][FONT=.VnTime]§é pH cña dung dÞch t¨ng lªn.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; [/FONT][FONT=.VnTime][FONT=.VnTime]2-[/FONT]&nbsp; &nbsp;&nbsp; [/FONT][FONT=.VnTime]Nång ®é cña ion H+ lµ 1M.[/FONT][FONT=.VnTime][FONT=.VnTime]3-[/FONT]&nbsp; &nbsp;&nbsp; [/FONT][FONT=.VnTime]Nång ®é cña ion H+ &gt; nång ®é cña ion OH-.[/FONT][FONT=.VnTime][FONT=.VnTime]4-[/FONT]&nbsp; &nbsp;&nbsp; [/FONT][FONT=.VnTime]Axit axetic ph©n li hoµn toµn.[/FONT][FONT=.VnTime]A: ChØ 2.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C: C¶ 1 vµ 3.[/FONT][FONT=.VnTime]B: ChØ 3.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: C¶ 2 vµ 4.[/FONT][FONT=.VnTime]C©u 27: NÕu thªm dung dÞch natri hi®roxit (NaOH) vµo dung dÞch coban clorua th× thu ®&amp;shy;îc mét kÕt tña mµu xanh. NÕu thªm etanol ( C2H5OH) vµo dung dÞch coban clorua th× ®&amp;shy;îc mét dung dÞch mµu xanh. Dù ®o¸n hîp chÊt nµo d&amp;shy;íi ®©y cã thÓ t¹o kÕt tña mµu xanh víi dung dÞch coban clorua trong n&amp;shy;íc?[/FONT][FONT=.VnTime]A: Dung dÞch natri clorua&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: Metanol ( CH3OH).[/FONT][FONT=.VnTime]B: Dung dÞch bari hi®roxit&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: N&amp;shy;íc.[/FONT][FONT=.VnTime]C©u 28: Dßng ®iÖn cã thÓ ®i qua mét dung dÞch muèi bëi v×:[/FONT][FONT=.VnTime]A: Electron t¹o nªn dßng ®iÖn nh¶y tõ h¹t nµy sang h¹t kh¸c.[/FONT][FONT=.VnTime]B: Electron rÊt nhá, ®ñ ®Ó di chuyÓn gi÷a c¸c h¹t trong chÊt láng.[/FONT][FONT=.VnTime]C: Ion ®&amp;shy;îc t¹o thµnh trong chÊt láng khi cã dßng ®iÖn.[/FONT][FONT=.VnTime]D: ChÊt láng chøa c¸c ion di chuyÓn khi cã dßng ®iÖn.[/FONT][FONT=.VnTime]C©u 29: TÝnh chÊt nµo d&amp;shy;íi ®©y cña axit gióp x¸c ®Þnh axit lµ m¹nh hay yÕu?[/FONT][FONT=.VnTime]A: pH cña axit.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; C: Nång ®é cña axit.[/FONT][FONT=.VnTime]B: TÝnh tan cña axit trong n&amp;shy;íc.&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; D: Kh¶ n¨ng cho pr«ton trong n&amp;shy;íc.[/FONT][FONT=.VnTime]C©u 30: Mét dung dÞch cã chøa kali nitrat vµ kali sunfat. Nång ®é cña ion kali b»ng 0,650 mol.l- vµ cña ion nitrat b»ng 0,400 mol.l-. Nång ®é cña ion sunfat b»ng:[/FONT][FONT=.VnTime]A: 0,325 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; B: 0,250 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; C: 0,200 mol.l-&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; D: 0,125 mol.l-&nbsp; &nbsp;&nbsp; [/FONT][FONT=.VnTime] [/FONT]</blockquote>

[QUOTE="hangquyet, post: 21960, member: 7514"] [COLOR=#000000][FONT=.VnTime][B][U]C©u 1:[/U][/B] Etan vµ eten lµ hai khÝ chØ chøa cacbon vµ hi®ro. Mét mÉu etan cã 4,53 g hi®ro kÕt hîp víi 18,0 g cacbon. Mét mÉu eten cã 7,25 g hi®ro kÕt hîp víi 43,20 g cacbon. KLNT: C = 12, H = 1,01.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Tõ sè liÖu nµy, c«ng thøc thùc nghiÖm ( cã tØ lÖ nguyªn ®¬n gi¶n nhÊt) cña hai hîp chÊt etan vµ eten theo thø tù lµ:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : C2H6, CH2 B : CH3, C2H4 C : C2H6, C2H4 D : CH3, CH2[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 2:[/U][/B] Khi trén hai dung dÞch víi nhau, cã thÓ t¹o thµnh chÊt r¾n. XÐt b¶ng c¸c dung dÞch ®îc trén víi nhau. DÊu + cã nghÜa lµ t¹o chÊt r¾n, dÊu – nghÜa lµ kh«ng t¹o ®îc.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Dung dÞch[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Clorua[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Sunfat[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Cacbonat[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Nitrat[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B¹c[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Bari[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]§ång[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Kali[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ch×[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Stronti[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Khi thªm dung dÞch S vµo dung dÞch clorua, sunfat vµ nitrat kh«ng thÊy t¹o chÊt r¾n. Tuy nhiªn cã t¹o thµnh chÊt r¾n khi thªm dung dÞch S vµo dung dÞch cacbonat. V× vËy dung dÞch S cã thÓ lµ dung dÞch:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : Bari nitrat B : B¹c nitrat C : §ång nitrat D : Kali nitrat [B][U]C©u 3:[/U][/B] C¸c nguyªn tè díi ®©y ®Òu t¹o clorua. Chän trong c¸c danh s¸ch ghi díi ®©y nh÷ng nguyªn tè nµo chØ t¹o hîp chÊt ion cña clorua.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : Canxi, Natri, §ång. C : Ph«tpho, Lu huúnh, Cacbon[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B : Kali, Ph«tpho, Cacbon D : Magiª, Ph«tpho, Lu huúnh[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 4:[/U][/B] CÆp chÊt nµo díi ®©y cã thÓ ph¶n øng ®Ó chØ t¹o muèi vµ níc?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : Magie vµ axit sunfuric C : B¹c nitrat vµ axit clohi®ric[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B : Natri cacbonat vµ axit sunfuric D : Kali hi®roxit vµ axit nitric[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 5:[/U][/B] Nhãm nµo díi ®©y chØ chøa baz¬?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : Magie hi®roxit, ®ång hi®roxit, cacbon ®ioxit. C : Lu huúnh ®ioxit, ch× oxit, cacbon ®ioxit[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B : Canxi hi®roxit, ®ång oxit, natri oxit D : Ph«tpho pentoxit, clo(I) oxit, nit¬ ®ioxit[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 6:[/U][/B] Níc biÓn cã chøa kho¶ng 3,4% khèi lîng lµ muèi tan. ChØ cã 9 lo¹i ion t¹o thµnh trªn 99% chÊt tan trong níc biÓn.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]ChÊt tan v« c¬ trong níc biÓn[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime] PhÇn tr¨m [/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ion ( theo khèi lîng)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Na+ 30,61[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Sr2+ 0,04[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Mg2+ 3,69[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ca2+ 1,16[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K+ 1,10[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]HCO3- 0,41[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Br- 0,19[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Cl- 55,04[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]SO42- 7,68[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]PhÇn tr¨m khèi lîng cña muèi natri clorua hoµ tan lµ:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : 3,4% B : 99,99% C : 85,65% D : 30,61%[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 7:[/U][/B] C¬ quan cung cÊp níc xö lý níc b»ng nhiÒu c¸ch kh¸c nhau, trong ®ã cã thÓ thªm clo vµ phÌn kÐp nh«m kali ( K2SO4.Al2(SO4)3.24H2O ). V× sao ph¶i thªm phÌn kÐp nh«m kali vµo níc?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : §Ó lµm níc trong C : §Ó khö trïng níc[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B : §Ó lo¹i bá lîng d ion florua D : §Ó lo¹i bá c¸c rong, t¶o[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 8:[/U][/B] Decan lµ mét ankan cã c«ng thøc C10H22. Undecan, ®odecan, tridecan vµ tetradecan lµ tªn cña c¸c ankan lÇn lît cã 11, 12, 13 vµ 14 cacbon. C«ng thøc ph©n tö cña pentadecan ph¶i lµ:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A : C5H12 B : C6H15 C : C15H30 D : C15H32[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 9:[/U][/B][U] [/U]Propan ch¸y trong oxi t¹o cacbon ®ioxit vµ h¬i níc theo ph¬ng tr×nh sau:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime] 5O2(khÝ) + C3H8(khÝ) ---> 3CO2(khÝ) + 4H2O(khÝ)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Trong ®iÒu kiÖn nhiÖt ®é vµ ¸p suÊt kh«ng ®æi:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 1 lÝt O2 ph¶n øng víi 5 lÝt C3H8 C: 1 lÝt H2O ®îc t¹o tõ 5/4 lÝt O2[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: 1 lÝt O2 ph¶n øng víi 3/5 lÝt CO2 D: 1 lÝt H2O ®îc t¹o tõ 3 lÝt C3H8[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 10:[/U][/B][U] [/U]XÐt c¸c sè liÖu sau cña mét sè ankan:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ankan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]NhiÖt ®é s«i( 0C)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ankan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]NhiÖt ®é s«i( 0C)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Metan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Etan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Propan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Butan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Pentan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-161,6[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-88,6[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-42,1[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]-0,5[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]36,1[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Hexan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Heptan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Octan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Nonan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]§ecan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]68,7[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]98,4[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]125,7[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]150,8[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]174,1[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Nh÷ng ankan nµo trong b¶ng lµ chÊt khÝ ë nhiÖt ®é phßng?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: Decan, nonan, octan, heptan, hexan vµ pentan v× nhiÖt ®é s«i cña chóng lín h¬n nhiÖt ®é phßng.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: Butan, propan, etan vµ metan v× nhiÖt ®é s«i cña chóng nhá h¬n nhiÖt ®é phßng.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]C: Metan vµ etan v× chóng lµ nh÷ng ankan nhÑ h¬n kh«ng khÝ[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]D: Etan, butan vµ propan.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 11:[/U][/B] Tªn chÊp nhËn ®îc cho chÊt h÷u c¬ díi ®©y ph¶i lµ:[/FONT][/COLOR] [FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][COLOR=#000000][FONT=.VnTime] CH3 [/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime] [/FONT][/COLOR] [FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][COLOR=#000000][FONT=.VnTime] CH3 CH2 C CH3[/FONT][/COLOR] [FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT] [COLOR=#000000][FONT=.VnTime] CH3[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 2,2- ®imetylbutan B: trietylpropan C: 2,2-®imetylpropan D: 3,3-dimetylpropan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 12:[/U][/B] Khi thæi kh«ng khÝ vµo níc nguyªn chÊt, dung dÞch thu ®îc cã tÝnh axit. KhÝ nµo sau ®©y g©y nªn tÝnh axit ®ã?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: Cacbon ®ioxit B: Hi®ro C: Oxi D: Nit¬[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 13:[/U][/B] Y lµ dung dÞch H2SO4 vµ X lµ dung dÞch NaOH 0,1200M. Víi 25,00ml H2SO4 th× cÇn ®Õn 38,14ml NaOH ®Ó ®¹t ®iÓm t¬ng ®¬ng. Nång ®é cña dung dÞch H2SO4 lµ:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 0,09154M B: 0,1831M C: 5,462M D: 10,92M[/FONT][/COLOR] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [B][U][FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT][/U][/B] [FONT=.VnTime][COLOR=#000000][/COLOR][/FONT][COLOR=#000000][FONT=.VnTime][B][U]C©u 14:[/U][/B]Muèi lµ nh÷ng chÊt ®îc t¹o thµnh tõ sù liªn kÕt mét thµnh phÇn kim lo¹i víi mét thµnh phÇn cã tÝnh axit nh sù biÓu diÔn trong b¶ng bªn díi. Chóng cã thÓ tan trong níc(T) hay kh«ng tan trong níc (K)[/FONT][/COLOR] [FONT=.VnTime][COLOR=#000000][/COLOR][/FONT] [COLOR=#000000][FONT=.VnTime]Bari[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ch×[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Kali[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B¹c[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Sunfat[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Clorua[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Nitrat[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ph«tphat[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]T[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Theo b¶ng trªn th× ph¸t biÓu nµo sau ®©y lµ ®óng.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: TÊt c¶ c¸c muèi ch× lµ c¸c chÊt kh«ng tan trong níc.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: PhÇn lín muèi ph«tphat th× hoµ tan ®îc trong níc h¬n lµ kh«ng hoµ tan[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]C: TÊt c¶ c¸c muèi nitrat vµ tÊt c¶ c¸c muèi kali th× tan trong níc.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]D: PhÇn lín muèi sunfat lµ kh«ng tan trong níc h¬n lµ tan trong níc.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 15:[/U][/B] Ph¸t biÓu nµo sau ®©y m« t¶ mét chÊt ®iÖn li yÕu chÝnh x¸c nhÊt?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: Dung dÞch lo·ng.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: ChÊt kh«ng tan trong níc.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]C: ChÊt chñ yÕu gåm c¸c ph©n tö, chØ chøa vµi ion.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]D: ChÊt ph©n li thµnh ion ë thÓ láng hay nãng ch¶y chø kh«ng ph©n li trong dung dÞch.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 16:[/U][/B] Mét häc sinh líp 11 lµm ®æ mét Ýt amoni¨c ra sµn bÕp. Dïng chÊt nµo sau ®©y cã s½n trong nhµ ®Ó trung hoµ amoni¨c?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: GiÊm ¨n( axit axetic) C: X« ®a( natri cacbonat)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: Muèi ¨n( natri clorua) D: Bét tÈy tr¾ng( canxi hipoclorit)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 17:[/U][/B] Hoµ tan 0,67 g Kali dicromat ( K2Cr2O7) vµo mét lÝt níc ®Ó ®iÒu chÕ dung dÞch W.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Dung dÞch W ®îc pha lo·ng mêi lÇn víi níc ®Ó ®îc dung dÞch X.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Dung dÞch X ®îc pha lo·ng mêi lÇn víi níc ®Ó ®îc dung dÞch Y.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]TÝnh nång ®é g/l cña dung dÞch Y? ( Cho K = 39,1; Cr = 52,0; O = 16,0).[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 0,0023 B: 0,067 C: 0,0067 D: 0,00067[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 18:[/U][/B] Hoµ tan 20,0 g natri hidroxit r¾n vµo kho¶ng 100ml níc råi thªm níc ®Õn ®óng 250ml th× dung dÞch thu ®îc cã nång ®é mol b»ng bao nhiªu? ( Cho Na = 23, H = 1, O = 16)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 0,125 mol.l- B: 0,50 mol.l- C: 5,0 mol.l- D: 2,0 mol.l-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 19:[/U][/B] Sè liÖu ph©n tÝch trªn nh·n cña mét lo¹i níc kho¸ng ®ãng chai lµ:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Ca2+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]80ppm[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Mg2+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]15ppm[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]K+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]4ppm[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Na+[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]6ppm[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]SO42-[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]85ppm[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]1ppm = mét phÇn triÖu = 1mg chÊt tan trong 1 lÝt dung dÞch.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]Cã bao nhiªu gam canxi trong chai níc kho¸ng 1,25 lÝt?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 80,0 g B: 0,080 g C: 8,00 g D: 0,100 g[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 20:[/U][/B] C¸ cÇn cã oxi ®Ó t¨ng trëng tèt. Chóng kh«ng thÓ t¨ng trëng tèt nÕu níc qu¸ Êm. Mét lÝ do cho hiÖn tîng trªn lµ:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: B¬i léi trong níc Êm cÇn nhiÒu cè g¾ng h¬n.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: Ph¶n øng ho¸ häc x¶y ra nhanh h¬n khi nhiÖt ®é t¨ng.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]C: Oxi hoµ tan kÐm h¬n trong níc Êm.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]D: Trong nín Êm sÏ t¹o ra nhiÒu cacbon ®ioxit h¬n.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 21:[/U][/B] Mét dung dÞch natri clorua trong níc cã chøa 15,3% natri clorua theo khèi lîng. NÕu cho bay h¬i hoµn toµn 437 gam dung dÞch cho ®Õn kh« th× cßn l¹i bao nhiªu gam natri clorua? ( Cho Na = 23, Cl = 35,5)[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 422 gam B: 352 gam C: 66,9 gam D: 8,9 gam[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 22:[/U][/B] Khèi lîng cña mét mol MgSO4.7H2O lµ 246,5 g. Khi hoµ tan 12,3 g MgSO4.7H2O trong 87,7 g níc, thu ®îc dung dÞch cã khèi lîng riªng lµ 1,06 g.ml- t¹i 200C. Nång ®é mol cña dung dÞch trªn lµ bao nhiªu?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 0,49 mol.l- B: 0,53 mol.l- C: 0,60 mol.l- D: 0,62 mol.l-.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 23:[/U][/B] Cµ phª hoµ tan ®îc ®iÒu chÕ b»ng ph¬ng ph¸p ®«ng – kh«. Cµ phª võa ®iÒu chÕ ®îc lµm ®«ng l¹nh råi ®Æt vµo trong mét b×nh chøa ®Ó rót hÕt kh«ng khÝ, t¹o ch©n kh«ng. Trong ch©n kh«ng, phÇn níc ®¸ trong dung dÞch cµ phª ®«ng l¹nh sÏ th¨ng hoa trong khi cµ phª ®· ®«ng kh« cßn l¹i nguyªn vÑn. ¦u ®iÓm cña ph¬ng ph¸p nµy lµ c¸c ph©n tö mïi trong cµ phª kh«ng bÞ ph¸ huû trong qu¸ tr×nh ®un nÊu kÐo dµi vµ cµ phª chÕ t¹o theo c¸ch nµy cã thÓ ®Ó ®îc l©u h¬n.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]ThuËt ng÷ th¨ng hoa cã nghÜa sù biÕn ®æi ®· x¶y ra lµ tõ:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: r¾n sang láng B: r¾n sang h¬i C: láng sang h¬i D: h¬i sang r¾n.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 24:[/U][/B] Tríc khi ®o ®iÖn t©m ®å (ECG) cho ngêi bÖnh, ®Çu dß cña ECG thêng ®îc phñ bªn ngoµi b»ng mét chÊt gi÷ Èm cã chøa natri clorua (NaCl). §iÒu nµy ®îc sö dông dùa trªn tÝnh chÊt nµo cña natri clorua?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: NaCl cã ®é nãng ch¶y cao. C: NaCl dÉn ®iÖn trong dung dÞch.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: NaCl dÔ tan trong níc. D: CÊu t¹o tinh thÓ cña NaCl.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 25:[/U][/B] Mét hi®rocacbon ë thÓ khÝ cã chøa 85,7% cacbon vµ 14,3% hi®ro theo khèi lîng. C«ng thøc nµo díi ®©y lµ phï hîp?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]1- CH4 2- C2H4 3- C3H6[/FONT][/COLOR] [FONT=.VnTime][SIZE=5][COLOR=#000000]A: ChØ c«ng thøc 1. C: C«ng thóc 1 vµ 2.[/COLOR][/SIZE][/FONT] [COLOR=#000000][FONT=.VnTime]B: ChØ c«ng thøc 3. D: C«ng thøc 2 vµ 3.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 26: [/U][/B]Thªm 1 mol axit axetic vµo 1 lÝt níc nguyªn chÊt. Mét hay nh÷ng ph¸t biÓu nµo díi ®©y ®óng?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][FONT=.VnTime]1-[/FONT] [/FONT][FONT=.VnTime]§é pH cña dung dÞch t¨ng lªn. [/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][FONT=.VnTime]2-[/FONT] [/FONT][FONT=.VnTime]Nång ®é cña ion H+ lµ 1M.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][FONT=.VnTime]3-[/FONT] [/FONT][FONT=.VnTime]Nång ®é cña ion H+ > nång ®é cña ion OH-.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][FONT=.VnTime]4-[/FONT] [/FONT][FONT=.VnTime]Axit axetic ph©n li hoµn toµn.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: ChØ 2. C: C¶ 1 vµ 3.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: ChØ 3. D: C¶ 2 vµ 4.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 27:[/U][/B] NÕu thªm dung dÞch natri hi®roxit (NaOH) vµo dung dÞch coban clorua th× thu ®îc mét kÕt tña mµu xanh. NÕu thªm etanol ( C2H5OH) vµo dung dÞch coban clorua th× ®îc mét dung dÞch mµu xanh. Dù ®o¸n hîp chÊt nµo díi ®©y cã thÓ t¹o kÕt tña mµu xanh víi dung dÞch coban clorua trong níc?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: Dung dÞch natri clorua C: Metanol ( CH3OH).[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: Dung dÞch bari hi®roxit D: Níc.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 28:[/U][/B] Dßng ®iÖn cã thÓ ®i qua mét dung dÞch muèi bëi v×:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: Electron t¹o nªn dßng ®iÖn nh¶y tõ h¹t nµy sang h¹t kh¸c.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: Electron rÊt nhá, ®ñ ®Ó di chuyÓn gi÷a c¸c h¹t trong chÊt láng.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]C: Ion ®îc t¹o thµnh trong chÊt láng khi cã dßng ®iÖn.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]D: ChÊt láng chøa c¸c ion di chuyÓn khi cã dßng ®iÖn.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 29:[/U][/B] TÝnh chÊt nµo díi ®©y cña axit gióp x¸c ®Þnh axit lµ m¹nh hay yÕu?[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: pH cña axit. C: Nång ®é cña axit.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]B: TÝnh tan cña axit trong níc. D: Kh¶ n¨ng cho pr«ton trong níc.[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime][B][U]C©u 30:[/U][/B] Mét dung dÞch cã chøa kali nitrat vµ kali sunfat. Nång ®é cña ion kali b»ng 0,650 mol.l- vµ cña ion nitrat b»ng 0,400 mol.l-. Nång ®é cña ion sunfat b»ng:[/FONT][/COLOR] [COLOR=#000000][FONT=.VnTime]A: 0,325 mol.l- B: 0,250 mol.l- C: 0,200 mol.l- D: 0,125 mol.l- [/FONT][/COLOR] [FONT=.VnTime][COLOR=#000000] [/COLOR][/FONT] [/QUOTE]

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