
СО и ОВР
Authored by Marina Komarova
Chemistry
8th Grade
Used 6+ times

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11 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Степень окисления О2 и Хе одинаковые и равны
-2
+8
0
не одинаковые!
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Степень окисления серы в H2S и H2SO4
отличаются
одинаковые
-2 и +6
+6 и -2
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Степень окисления азота в азотистой кислоте равна
+5
-3
+2
+3
4.
FILL IN THE BLANK QUESTION
20 sec • 1 pt
запишите степень окисления марганца в перманганате калия KMnO4
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
В каком веществе нет элементов со степенью окисления +2 ?
Na2S
Cu2SO4
K2MnO4
AlCl3
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Что происходит с электронами марганца при изменении степени окисления от +2 до +7 ?
отдает 7 электронов
принимает 5 электронов
отдает 5 электронов
принимает 7 электронов
7.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
запишите, сколько электронов теряет сера при переходе S-2 --->S+6
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