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Quiz
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Chemistry
•
6th - 8th Grade
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Practice Problem
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19 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Что такое pKa?
Константа равновесия кислотно-основной реакции
Отрицательный логарифм концентрации ионов водорода
Связь между pH и концентрацией
Отрицательный логарифм кислотной константы
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Какой объем 0,1 М раствора HCl потребуется для нейтрализации 25 мл 0,2 М NaOH?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой из углеводородов имеет наиболее высокую температуру кипения?
метан
пропан
бутан
пентан
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой ион определяет кислотность раствора?
Na⁺
OH⁻
Н+
Cl⁻
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой фактор влияет на константу равновесия реакции?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какая реакция используется для отличия альдегидов от кетонов?
реакция серебрянного зеркала
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какой цвет индикатора фенолфталеина в щелочной среде?
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