
Кремний 9 класс
Authored by Сергеевна undefined
Chemistry
1st Grade
Used 3+ times

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30 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Какое место занимает кремний в периодической системе:
2 период, 4 гр.побоч.
3 период, 3 гр. главн.
3 период, 4 гр. главн.
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
По распространенности в природе кремний _____ элемент:
первый
второй
третий
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Соли кремниевой кислоты:
карбонаты
гидросиликаты
силикаты
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Из предложенных соединений выберите формулу оксида кремния:
Si3О2
SiО2
SiО
Si2О3
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Из природных соединений кремния наиболее распространен:
оксид кремния
силан
кремневая кислота
6.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
Кремниевая кислота образуется при взаимодействии:
SiO2 и HCl
SiO2 и H2O
Na2SiO3 и H2SO4
K2SiO3 и HCl
7.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
Охарактеризуйте свойства кремниевой кислоты:
нерастворима в воде
легко разлагается при небольшом нагревании
может быть получена при взаимодействии SiO2 и H2O
является сильной кислотой
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