1、 2015 2 60 1 “ ” A B C D . A B C D A A B B C C D D C 2 2 1991 In 49 115 A 115 B 49 C 66 D 164 . = = A = = 49 49 115 B = = 49 49 C = = 49 49 66 D = = 49 49 164 B = = 3 2 A B C D - . A A B B C C D D A 4 2 2009 KMnO 4 A B C D . KMnO 4 “ + ” KMnO 4 A B C D C 5 2 “ ” K 2 Cr 2 O 7 Cr 2 SO 4 3 A +6 +3 B +3
2、 +6 C +6 +5 D +5 +3 . K 2 Cr 2 O 7 Cr 2 SO 4 3 +1 2 x K 2 Cr 2 O 7 +1 2+2x+ 2 7=0 x=+6 2 y Cr 2 SO 4 3 2y+ 2 3=0 y=+3 A 6 2 N 2 NO NO 2 NH 4 NO 3 N A 3 B 4 C 5 D 6 . 0 0 N 2 N 0 NO O 2 0 N +2 NO 2 O 2 0 N +4 NH 4 NO 3 +1 N 3 N +5 N 5 0 +2 +4 3 +5 C O N 7 2 2003 A B C D . A A B B C C D D D 8 2 2011 A
3、 HCHO B CO 2C NH 3D CH 4 . A HCHO B CO 2 C NH 3 D A 9 2 A B C D 2 . A = =13 =10 3 4 B = = = = C 8 2 D = =13 =10 A = =13 =10 3 4 A B = =13 =10 B C 8 2 C D = =13 =10 3 D D 10 2 A B C D . A B C D D 11 2 2005 KCl Cl 2HClO X NaClO 4 X A AgCl B KClO 3C HClO 2D Cl 2 O 5 . 1 0 +1 x +7 A AgCl 1 B KClO 3 +1 +
4、b+ 2 3=0 b=+5 C HClO 2 +1 +c+ 2 2=0 c=+3 D Cl 2 O 5 2d+ 2 5=0 d=+5 X A A 12 2 A B C D . A B C D A A B B C C D D D 13 2 2012 “ ” “ ” A B C D . A B C D A B D A A 14 2 2014 20 60 4 O 4 A O 4 B O 4 2 O 2 C O 4 O 2 D O 4 O 2 . A O 4 B O 4 C O 4 O 2 D O 4 O 2 A O 4 A B O 4 “ O 4 2 O 2 ” B C O 4 O 2 “O 4 O 2 ” C D O 4 O
