
Жайдар
Authored by Жайдарлым Ермұрат
Chemistry
9th Grade
Used 2+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Уравнение образования гидрокарбоната кальция в природе:
CaCO₃ + CO₂ + H₂O → Ca(O₃)₂
CaCO₃ + CO₂ + H₂O → Ca(HCO₃)₂
CaCO₃ + CO₂ + H₂O → Ca(HO₃)₂
CaCO₃ + H₂O → Ca(HCO₃)₂
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
К какому классу ферментов относится бромелайн?
Протеазы
Пропен
Протез
Протеаз
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Как называется эффект, вызванный накоплением CO₂ в атмосфере из-за деятельности человека?
эффект
Парафиновый эффект
Парниковый эффект
Парник эффект
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Сколько частиц содержит 10 г кристаллического йода при плотности раствора 0,95 г/мл?
185 мл раствора
210 мл раствора
150 мл раствора
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Сколько электронов содержит анион I⁻?
53 электрона
54 электрона
14 электрона
электрона
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Этот газ выделяется при дыхании человека и животных, а также при горении топлива. Он входит в состав сухого льда.
CO₂
CO
CО
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какова сумма коэффициентов в уравнении фотосинтеза: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂?
5
78
7
47
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