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1-101
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•99 Qs
химия 200-300
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100 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
В реакции
2KMnO4+16HCl =2KCl+2MnCl2+5Cl2+8H2O
количество электронов отданных хлором:
2
4
6
3
5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
В реакции
2KMnO4+3K2SO3+H2O=2MnO2+3K2SO4+2KOH
указать восстановитель:
K2SO3
H2O
MnO2
KOH
KMnO4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
В реакции
3S+6NaOH=Na2SO3+2Na2S+3H2O
и восстановитель и окислитель:
S
H2O
NaOH
Na2SO3
Na2SO4
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
В реакции
2KClO3=2KCl+3O2
число электронов, отданных
кислородом :
4
3
5
6
2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
В реакции
2KMnO4=K2MnO4+MnO2+O2
указать элемент, принимающий электроны:
Mn
K
O
нет такого элемента
все элементы только отдают электроны
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Указать тип ОВР: :
2KClO3=2KCl+3O2
внутримолекулярная
диспропорционирование
межмолекулярная
конпропорционирование
молекулярная
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Указать тип окислительно-восстановительной реакции
3S+6NaOH=Na2SO3+2Na2S+3H2O
диспропорционирование
конпропорционирование
внутримолекулярная
молекулярная
межмолекулярна
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