8. HKI. KHTN
Authored by Hong Anh
English
8th Grade
Used 3+ times
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1. Chất nào sau đây là acid?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2. Chất nào sau đây tác dụng với Hydrochlric acid sinh ra khí H2?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Cho 5,6g sắt tác dụng vơi hydrochloric acid dư, sau phản ứng thể tích khi H2 thu được ở đkc là:
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4. Dung dịch chất nào sau đây là quỳ tím hoá xanh?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5. Sodium hydroxide (xút ăn da) là chất rắn, không màu, dễ nóng chảy, hút ẩm mạnh, tan nhiều trong nước và toả ra một lượng nhiệt lớn. Công thức của Sodium hydroxide là?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6. SO2 là oxide:
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
7. Cứ mỗi hecta đất nông nghiệp ở Quảng Ngãi cần 45 kg nitrogen. Như vậy, để cung cấp đủ lượng Nitrogen cho đất thì cần phải bón bao nhiêu kg phân ure?
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