
KHTN 8_MUỐI
Authored by Linh Khánh
Science
8th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
PTHH nào sau đây viết sai?
2.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Cho dung dịch KOH vào ống nghiệm đựng dung dịch FeCl3, hiện tượng quan sát được là:
Có kết tủa trắng xanh
Có khí thoát ra
Có kết tủa đỏ nâu
Kết tủa màu trắng
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho sơ đồ phản ứng sau: Na2CO3 + ? ---> BaCO3 + NaCl
Chất phù hợp để điền vào dấu ? là
BaCl
BaCl2
BaClO
Ba(ClO)2
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Cho phương trình hoá học: BaCO3 + 2HCl → BaCl2 + Y + H2O
Vậy chất Y là
CO
H2
Cl2
CO2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trộn 2 dung dịch nào sau đây sẽ không xuất hiện kết tủa?
BaCl2, Na2SO4
Na2CO3, Ba(OH)2
BaCl2, AgNO3
NaCl, K2SO4
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