Hoá học 8 - đề kiểm tra, thi học kỳ, sưu tầm thi học sinh giỏi tham khảo ôn thi (31)

 PHÒNG GIÁO DỤC VÀ ĐÀO TẠO ĐỀ THI CHỌN HỌC SINH GIỎI MÔN: HOÁ HỌC 8 (Không kể thời gian giao đề) Câu 1 ( 2,0 đ):  !"#$%&'()*"+',-'$. / (0. /1 2 (2.  /1 3 (3.   2 /1 4  (4.  5'/1 4 !#&67)8'9:;'9:6<=>?@/67A"+'B&67 ,CA"=>0@7D&6EEF)8<G Câu 2 (2,0đ): 05H=I9!8:'A1"J,:AK>80LAMNO"MPQ'QR 1$S"T0?UG 2VDMP ):!+AW6MNKCC)8:$=NKXAY !'&Z)8,C,DE,6=MP&Z=7[ Câu 3 (1, 0 đ):58AT=MP,A=87\$,6=MP00E2AK>8Q'QR5= QMO'"MP4E4@=,D")C<X"R,A=87\G Câu 4( 1,5 đ):5$4!O]):!X,D&'^D")8E,D8_E,D!8 K>,D=M''`"8_a9:'X"Jb!X!O,D):(c' $. Câu 5 ( 2, 5 đ):)'d3A=QQ 2 /1 4 0eHQf?A=QQ1 . !.DS"TQQ1"aQf .')'dQQ 2 /1 4 g):!hQQ^1?EiU$,6=MP): 0E4?jA=OH!8:'A=QQ^1G Câu 6 ( 1, 0 đ): eTPIO>k3'9:6E,6=MPl'9:65=>2E4E'9: 6=>EiK>'9:61=>0EiOA5lPIE!,6=MPA8= lPI=>4iG (5m02Em0E1m0iE^m3EnFm?iE5'mi4Eomi?Em23. HẾT  PHÒNG GIÁO DỤC VÀ ĐÀO TẠO HƯỚNG DẪN CHẤM THI CHỌN HSG MÔN: HOÁ HỌC 8 Câu Đáp án Điểm 0 j0./p1 2  8 /1 2 2.2/1 2 p1 2  8 E 2 1 ? 2/1 3 3./1 3 p 2 1 →  2 /1 4 4. 2 /1 4 p5'1 → 5'/1 4 p 2 1 E2? E2? E2? E2? !j$ppFm?@ mq2pm?@(O&6m&6F.(0. 8&67A"+'B&67,CA"=>0@: 2cm0@(2. k(0.K>(2.OA"MPm2rm0 E2? E2? E2? E2? 2 0%_=>&6A1H=I9"Jd $A 1 m_(.KN_q mmqA QQ m0Lp_(. sQtC]5Um  QQ A 0U A ⇔ _ 0Um0?U _p0L ⇔ _m3(. E2? E2? E2? E2? 2. aj):!+AW6MNKCC)8:$=NKXAY=> Q8,D51 2 $)8,C,D"auKNMNKC)85(1. 2  78I)Z,C551 3 51 2 p5(1. 2  q551 3 p 2 1 -8,6=MP551 3 Y:#):!+AW E2? E2? b j^'&Z)8,C,D_V9)u nFK>,D 8_788_&ZDQt788_&Zk 3nFp21 2   8 -qnF 3 1 4 sQt"R='v^w ^6=MP&Z&'um,6=MP&Z!"H'p,6=MP ,D8_ mmq^6=MP&Z&'u&x[ E2? E2? 3 2   4E4@  m m mE2(A8=. 22E4 22E4 %A=>$)Rl,A=87\(A ∈ oEyAy4. $ \pA5= → \5= A p A 2  2 ↑ E02? E02? 0A A 2 F8 \ m 2   A 2 m 2E2 A q \ E4 m A →  \ \ A 00E2 \m m m2@A E4  A NXX)RlE$X)R\MB]M&'  0 2 3 \ 2@ ?i @4 X)RDP=> m2 \m?i    → ^A=87/Z(nF. E2? E2? E2? 4 zX&6]X=%,DHvF8&60E2E3E4 pf>"$A"M=7HAX=%Ev),D - 1 2 KO=>A>"$A!fX9 - 3,Dd=7,CMP=>/1 2 E51 2 K> 2 p{=H=MPk,Dd=7K>8QQMN)8AEv) -^D/1 2 Q8=>AAIA>'QQ)8AKO /1 2 p) 2 p 2 1 q 2 /1 4 p2) -2,Dd=7,CMP=>,D 2 E51 2 ptQ{=H=MPX,Dd=7|'Q'QRMNKC)8E v),D - 51 2 K>78K}"t 51 2 p5(1. 2  q551 3 p 2 1 -5d=7=>,D 2 ,CMP E02? E02? E02? E02? E02? E02? E02? E02? E02? E02? E02? E02? ? j 2 /1 4 p21 →  2 /1 4 p2 2 1 E2? !j- 2 4 H SO mE30mE3(A8=. -F8E 1 m2 2 4 H SO m2E3mEi(A8=. → 5 e(1. m 0, 06 0, 05 m0E2e E2? E2? E2? j)'d!h^1  2 /1 4 p2^1 → ^ 2 /1 4 p2 2 1  ^1 m2 2 4 H SO m2E3mEi(A8=. A ^1 mEi?im3E3i(. A QQ(^1?EiU. m3E3i 100 5, 6 mi(.  QQ(^1. m 6 1, 045 m?LE4(A=. E2? E2? E2? E? E2? i $ 5 m 2E4 E2 02 mol=   m Ei Ei 0 mol=  1 m 0Ei E0 0i mol=  51mE2EiE0 m2i0  5"BV5 2  i 1 8,6=MPA8=lPI=>4ime 2 i C H O  :5lPI=>5 2  i 1 E02? E02? E02? E2? E02? E02? E02? HẾT .  PHÒNG GIÁO DỤC VÀ ĐÀO TẠO ĐỀ THI CHỌN HỌC SINH GIỎI MÔN: HOÁ HỌC 8 (Không kể thời gian giao đề) Câu 1 ( 2,0 đ):  !"#$%&'()*"+', - '$. / (0. /1 2 (2.  /1 3 (3.   2 /1 4  (4.  5'/1 4 !#&67 )8 '9:;'9:6<=>?@/67A"+'B&67 ,CA"=>0@7D&6EEF )8 <G Câu. q551 3 p 2 1 - 8 ,6=MP551 3 Y:#):!+AW E2? E2? b j^'&Z )8 ,C,D_V9)u nFK>,D 8_  78 8_ &ZDQt 78 8_ &Zk 3nFp21 2   8 -qnF 3 1 4 sQt"R='v^w ^6=MP&Z&'um,6=MP&Z!"H'p,6=MP ,D 8_  mmq^6=MP&Z&'u&x[ E2? E2? 3 2  . aj):!+AW6MNKCC )8 :$=NKXAY=> Q8,D51 2 $ )8 ,C,D"auKNMNKC )8 5(1. 2   78 I)Z,C551 3 51 2 p5(1. 2  q551 3 p 2 1 - 8 ,6=MP551 3 Y:#):!+AW E2? E2? b