
Chemistry Quiz
Authored by Thoa Hà
Chemistry
8th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tỉ lệ hệ số tương ứng của chất tham gia và chất tạo thành của phương trình sau: Fe + 2HCl → FeCl2 + H2
1:2:1:2
1:2:2:1
2:1:1:1
1:2:1:1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Than cháy tạo ra khí carbon dioxide (CO2) theo phương trình: Carbon + oxygen → Khí carbon dioxide Khối lượng carbon đã cháy là 4,5kg và khối lượng oxygen phản ứng là 12kg. Khối lượng khí carbon dioxide tạo ra là?
16,2 kg
16.3 kg
16,4 kg
16,5 kg
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Người ta điều chế vôi sống bằng cách nung đá vôi. Lượng vôi sống thu được từ 1 tấn đá vôi với hiệu suất phản ứng bằng 90% là
0,252 tấn
0,378 tấn
0,504 tấn
0,405 tấn
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là acid?
NaOH
CaO
KHCO3
H2SO4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây không phải là acid?
NaCl
HNO3
HCl
H2SO4
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây tác dụng với Hydrochlric acid sinh ra khí H2?
MgO
FeO
CaO
Fe
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dung dịch chất nào sau đây làm quỳ tím hóa xanh?
NaCl
Na2SO4
NaOH
HCl
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