
Кислород
Authored by Катрин Н
Chemistry
7th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Химическая формула кислорода:
О
О2
2О
О3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Кислород - самый распространенный элемент:
Во Вселенной
в земной коре
в атмосфере
на Солнце
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Относительная молекулярная масса кислорода равна:
32
48
16
8
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Только из атомов кислорода построены молекулы:
углекислого газа
железной окалины
азота
озона
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Кислород нельзя получить по реакции:
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Кислород можно собрать в сосуд:
Расположенным дном вверх
Расположенным дном вниз
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Наличие кислорода в сосуде можно доказать:
С помощью тлеющей лучины
по запаху
по цвету
добавлением известковой воды
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