89. Qaysi birikmalarda temirning oksidlanish darajasi +2 bo’ladi. 1) mor tuzi; 2) sariq qon tuzi; 3) qizil qon tuzi; 4) kaliy ferrat; 5) temir kuporosi A) 2,3 B) 1,4,5 C) 1,2 D) 1,2,5
90. Birikmalarning qaysi birida oltingugurtning oksidlanish darajasi -1 ga teng. A) vodorod sulfid B) kalsiy gidrosulfat C) temir disulfid D) natriy sulfit
91. Oksidlanish darajasi manfiy bo’lgan azot birikmalarini toping. 1) HNO3; 2) NH4Cl; 3) NH3; 4) NO; 5) NH2OH; 6) NaNO3 A) 2,3,6 B) 4,5,6 C) 1,2,4 D) 2,3,5
92. Azotning birikmalardagi oksidlanish darajalarini toping. 1) N2H4; 2) NH2OH; 3) NH4Cl; 4) HNO2; 5) CO(NH2)2 A) -3, -2, -4, +3, -2 B) -1, +3, -3, +3, -1 C) -2, -1, -3, +3, -3 D) +3, -3, +2, +3, +4
93. Atomining valentligi uchga, oksidlanish darajasi esa nolga teng bo’lgan molekulani toping. A) ammiak B) vodorod ftorid C) azot D) fosfor(V)oksid
94. Mishyakning eng past oksidlanish darajasiga ega bo’lgan ionining elektron kofiguratsiyasini toping. A) …3d104s24p5 B) …3p63d10 C) …3p64s2 D) …3s23p63d104s24p6
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