Ham oksidlovchi, ham qaytaruvchi xossalarni namoyon qilmaydigan moddal

A) 1-b, 2-a, 3-b, 4-b, 5-c, 6-d
B) 1-c, 2-c, 3-a, 4-b, 5-a, 6-c
C) 1-c, 2-a, 3-c, 4-a, 5-a, 6-b
D) 1-a, 2-b, 3-c, 4-a, 5-a, 6-a 66. (v17-121-8) Oksalat (shavel) kislotani neytral muhitda kaliy permanganat bilan oksidlandi. Oksidlovchi va qaytaruvchining ekvivalent massasini aniqlang. A) 31,6; 15 B) 52,7; 45 C) 79; 90 D) 158; 45 67. (v19/20-112-25) Quyidagi jarayonlarning qaysilari qaytarilish jarayoni hisoblanadi? 1) Mn+7 -> Mn+2; 2) S+4 —> S+6; 3) Mn+4 -> Mn+7; 4) C+4 -> C+2. A) 1 va 2 B) 2 va 3 C) 3 va 4 D) 1 va 4 68. (v19/20-123-25) Faqat oksidlovchi xossalarini namoyon qiluvchi zarrachalarni korsating. 1) K°; 2) Na+; 3) Cr3+; 4) Al3+; 5) N3"; 6) Cr6+. A) 2, 4, 6 B) 1, 3, 5 C) 2, 5, 6 D) 3, 5, 6 69. (v19/20-125-8) Quyidagilardan qaysilari oksidlanish jarayonini aks ettiradi? 1) CH3CH2OH —> CH3CHO; 2) Cr20 -> Cr3+; 3) HCHO -> CH3OH; 4) PH3 —> P203. A) 2, 4 B) 1, 4 C) 2, 3 D) 1, 3 70. (v19/20-127-18) Oltingugurtning qaysi birikmalari faqat qaytaruvchi yoki faqat oksidlovchi xossalarini namoyon qiladi? 1) H2S; 2) S03; 3) H2S03; 4) H2S04; 5) Na2S03; 6) Na2S203. A) 1,2, 4 B)3, 6 C) 3, 4 D) 1 va 3 71. (v19/20-128-16) 0,4 mol MnO ~ ioni necha dona (NA) elektronni biriktirib Mn02 ga aylanadi? A)2-Na B)1,6-Na C) 1,2-Na D) 0,8-Na 72. (v20/21-108-8) Quyida berilganlardan faqat oksidlovchilarni ajrating. 1) NaMn04; 2) H2S04; 3) H2S; 4) Cr03; 5) NH3; 6) HCI04. A) 1,2, 5 B) 1, 2, 4, 6 C) 4, 5, 6 D) 1,2,3 73. (v20/21-109-3) 0,4 mol Mn0 4 ioni necha dona (Na) elektronni biriktirib Mn2+ ioniga aylanadi? A) 0,8-Na B)2-Na C) 1,6-Na D) 1-Na 74. (V20/21-117-20) Faqat oksidlovchi xususiyatga ega bolgan moddalarni toping. 1) nitrat kislota; 2) nitrit kislota; 3) kaliy xromat; 4) xrom (III) xlorid; 5) kalsiy gidrid; б) rux; 7) brom; 8) vodorod sulfid; 9) kaliy permanganat; 10) ammiak. A) 2, 4, 6 B)3, 5, 8 C)1,3, 9 D) 3, 4, 7 1) nitrat kislota; 2) vodorod sulfid; 3) nitrit kislota; 4) xrom (III) xlorid; 5) ammiak; 6) sulfit kislota; 7) vodorod peroksid; 8) kaliy bixromat; 9) marganes (IV) oksid. A) 1,2, 3,4, 8 B) 1,2, 5, 9 C) 1, 2, 5, 8 D) 2, 5, 8
E) 3, 4, 6, 7, 9