Element atomlarining boshqa elementlarning muayyan sondagi atomlarini biriktirib olish xususiyati


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KIMYO TEST 2022umumiy kimyo

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Qaysi birikmalarda uglerod atomlarining oksidlanish darajalari yig‘indisi -2 dan


katta? 1) C2H4 2) CH3COOH 3) С2Н5OH 4) C6H12O6
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1, 3
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# 2, 4
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1, 4
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2, 3
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Quyidagi reaksiya tenglamasidan oksidlovchi va qaytaruvchini ko‘rsating.
Fe + HCl -→FeCl2 +H2
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Fe - oksidlovchi, Cl – qaytaruvchi
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Fe - oksidlovchi, H – qaytaruvchi
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# H - oksidlovchi, Fe – qaytaruvchi
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Cl - oksidlovchi, Fe – qaytaruvchi
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28. Ammoniy nitrit tarkibidagi azot atomlarining oksidlanish darajasi yig‘indisi-ni aniqlang.
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-1
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# 0
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+2
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+1
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Qaysi zarrachalar juftligida xlorning oksidlanish darajasi manfiy qiymatga ega?
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A) ClO3- va HCl
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B) CIBr3 va CIF4
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C) Cl2O7 va CCl4
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#D) PCl5 va SCl2
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30. Qaysi tuzlarning suvli eritmasi fenolftaleinni to‘q qizil rangga bo‘yaydi?
1) natriy karbonat; 2) alyuminiy nitrat; 3) kaliy ftorid; 4) rux sulfat.
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# 1, 3

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