Câu hỏi về Hóa học
Authored by 19. Nguyên
English
12th Grade
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104 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
Để bảo quản các kim loại kiềm cần phải làm gì?
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Hiện tượng nào đã xảy ra khi cho Na kim loại vào dung dịch CuSO4?
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
Cho dung dịch Ba(HCO3)2 lần lượt vào các dung dịch: CaCl2, Ca(NO3)2, NaOH, Na2CO3, KHSO4, Na2SO4, Ca(OH)2, H2SO4, HCl. Số trường hợp có tạo ra kết tủa là
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Dẫn 17,6 gam CO2 vào 500 ml dung dịch Ca(OH)2 0,6M. Phản ứng kết thúc thu được bao nhiêu gam kết tủa?
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Dẫn V lit CO2 (đktc) vào dung dịch Ca(OH)2 thu được 25 gam kết tủa và dung dịch X, đun nóng dung dịch lại thu thêm được 5 gam kết tủa nữa. Giá trị của V là
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
Công thức của X, Y, Z lần lượt là:
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7.
OPEN ENDED QUESTION
3 mins • 1 pt
Nhôm bền trong môi trường không khí và nước là do
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