
ôn tập cuối năm
Quiz
•
Chemistry
•
8th Grade
•
Medium
son nguyen
Used 2+ times
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63 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nguyên tố X có nguyên tử khối bằng 3,5 lần nguyên tử khối của oxi. X là nguyên tố nàosau đây?
Ca
Na
K
Fe
2.
MATCH QUESTION
1 min • 1 pt
Phân loại các chất sau bằng cách nối
HCl
bazơ không tan
NaOH
bazơ tan
Cu(OH)2
axit
NaHSO4
muối trung hòa
K2SO4
muối axit
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
PTHH nào dưới đây chính xác khi cho Na tác dụng với H2O?
2Na + 2H2O -> 2NaOH + H2
Na + H2O -> NaOH + H2
Na + 2H2O -> 2NaOH + H2
Na + 2H2O -> Na(OH)2
4.
MATCH QUESTION
1 min • 2 pts
Nối công thức hóa học với tên gọi tương ứng
FeSO4
axit clohidric
CuCl2
natri clorua
HCl
magie hidroxit
NaCl
sắt (II) sunfat
Mg(OH)2
đồng (II) clorua
5.
DRAG AND DROP QUESTION
1 min • 1 pt
Oxi là chất (a) , không màu, không mùi, (b) trong nước, (c) không khí.
6.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Cho m gam bột sắt vào dung dịch axit sunfuric loãng dư, phản ứng hoàn toàn tạo ra 6,72 lít khí hiđro (đktc). Giá trị của m là:
16,8
15,6
8,4
11,2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đồng (II) sunfat là tên gọi của
Cu(OH)2
CuSO4
Cu2O
CuSO3
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