
9 кл хим неМе
Authored by Viki Ko
Biology
Professional Development
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14 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Степень окисления углерода в оксиде углерода(IV) равна:
а) +4;
б) –2;
в) +2;
г) 0
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Степень окисления углерода в карбонате кальция равна:
а) +6;
б) +3;
в) –2;
г) +4.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Укажите формулу оксида углерода(II):
а) SО2;
б) CО2;
в) SО3;
г) CO.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Укажите формулу угольной кислоты:
а) HСl;
б) H2SО3;
в) H2CО3;
г) H2SО4.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Укажите формулу нитрата кальция:
а) Са(NO2)2;
б) KNO3;
в) Са(NO3)2;
г) KNO2.
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Степень окисления атомов азота равна +3 в соединении:
а) NH3;
б) NаNO3;
в) N2O3;
г) Nа3N.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Атом азота на внешнем электронном слое содержит:
а) 2e ;
б) 7e ;
в) 5e
г) 4e .
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