
халькогены
Interactive Video
•
Chemistry
•
9th Grade
•
Practice Problem
•
Easy
Сергей Мизин
Used 1+ times
FREE Resource
6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Какая электронная схема соответствует атому серы?
2е,8е,5.е
2е,8,е,6е
2е.6е
2е.8е.1е
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
В каком из веществ сера имеет минимальную степень окисления?
SO2
H2SO4
H2S
SF6
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Как изменяется степень окисления кислорода в реакции
2H2O2 = 2H2O +O2
от -2 до 0
от -1 до 0
от 0 до -2
от 0 до -1
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Чем является кислород в реакциях с металлами?
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Составить уравнение реакции и определить сумму коэффициентов в реакции
2H2S +O2 =2S+ 2H2O
Ввести число
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
В какой реакции кислород проявляет восстановительные свойства?
2Na +O2 = Na2O2
S+O2 = SO2
O2 +2F2 =2OF2
CH4 +2O2 =CO2 +2H2O
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