hoa hoc
9th Grade
•10 Qs
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hoa hoc
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
PGD Hồng
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Đốt cháy hết 8 gam kim loại đồng trong khí oxi thu được 10 gam CuO. Khối lượng khí oxi tham gia phản ứng là
2,0 gam
8,0 gam
10,0 gam
18,0 gam
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho PTHH sau: 2Na + 2H2O --> 2NaOH + H2. Tỉ lệ số nguyên tử Na với số phân tử H2 là
2 : 1
1 : 1
1 : 2
2 : 2
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Nếu hai chất khí khác nhau mà có thể tích bằng nhau ( đo ở cùng nhiệt độ và áp suất) thì chứng có cùng
tỉ khối với không khí
khối lượng
khối lượng mol
số mol chất
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Cho phản ứng sau: a Al(OH)y + b H2SO4 --> Alx(SO4)y + c H2O . Giá trị của a, b, c, x, y lần lượt là
2, 3, 3, 2, 3
2, 2, 2, 3, 3
2, 3, 6, 2, 3
3, 3, 5, 2, 3
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Thể tích của 0,2 mol khí o2(đktc)là
22,4l
11,2l
4,48 l
2,24l
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Phần trăm khối lượng Fe trong Fe3O4
74,12%
72,50%
72,41%
24,14%
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Trộn 4 g bột lưu huỳnh với 14 gam bột sắt rồi đun nóng. Khối lượng sắt (II) sunfua(FeS) thu được là
18 gam
16 gam
13 gam
11 gam
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