
Hóa 9
Authored by Kim Dung
Chemistry
9th Grade
37 Questions
Used 3+ times

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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hòa tan hoàn toàn x gam CuO trong 200 ml dd HCl 0,5 M thì vừa đủ. Tính x.
8 g
4 g
0,8 g
0,4 g
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dãy oxit tác dụng với dung dịch H2SO4 loãng tạo thành muối và nước là
MgO, CO2
MgO, CuO
Al2O3, SO3
MgO, P2O5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất khí nào sau đây là nguyên nhân chính gây ra mưa axit?
CO2
CH4
H2
SO2
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Các oxit tác dụng được với nước là
CaO, FeO
PbO2, K2O
BaO, K2O
NO, SO2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Để tẩy trắng và chống nấm mốc các sản phẩm như dược liệu, măng khô, hoa quả khô,... ta phải dùng chất nào sau đây?
CaO
HCl
SO2
H2SO4
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Khí ẩm nào sau đây có thể được làm khô bằng canxi oxit?
SO3
SO2
H2
CO2
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Dãy chất nào sau đây chỉ gồm các oxit bazo?
CuO, CaO, MgO
CO2, K2O, Na2O
CuO, NO, MgO
CO, P2O5, Al2O3
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