
ôn tập KHTN
Authored by lê MinhTrang
Science
8th Grade
Used 4+ times

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33 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Acid là những chất làm cho quỳ tím chuyển sang màu j ?
Xanh
TÍm
đỏ
hồng
2.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
để an toàn khi pha sulfuric acid đăc cần thực hiên theo cách:
Rót cả nước và acid vào cùng 1 lúc
Rót từng giọt nước vào acid
rót từ từ acid vào nước và khuấy đều
cách nào cx được
3.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Cho sơ đồ phản ứng sau: ? + H2SO4 → Na2SO4 + CO2 + H2O
Chất thích hợp để điền vào vị trí dấu hỏi (?) là
NaOH
CaCO3.
Na2O.
Na2CO3.
4.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
acid có trong dạ dày của ng và động vật dùng để tiêu hóa thức ăn là acid j?
sulfuric acid
Acetic acid
Hydrochloric acid
acid stearic
5.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Cho các chất sau: KCl, NaOH, MgSO4, HNO3, P2O5, NaNO3. Số chất thuộc loại muối là
1
2
3
4
6.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
các loại phân lần đều cung cấp cho cây trồng nguyên tố
nitrogen
carbon
potassium
phophorus
7.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
công thức tính áp suất là
p=F/S
p=F.S
p=P/S
P=P/S
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