b1508
Authored by 40. Minh Tú
Science
8th Grade
Used 1+ times
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15 questions
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1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Cho dãy các chất sau theo thứ tự từ KL mạnh đến yếu: K, Ca, Al, ..., Pb, Cu.
Kim loại không phù hợp để điền vào "..." là:
Zn
Mg
Fe
Sn
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Phản ứng nào không xảy ra:
Na2CO3 + CaSO4
ZnCO3 + HCl
Na + BaSO4
Pt + AgCl
3.
OPEN ENDED QUESTION
3 mins • 1 pt
Cho 100g NaOHvà 90g HCl. Chất nào sẽ hết trước?
Evaluate responses using AI:
OFF
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho 80g NaOH tác dụng với 170g HCl. Tính khối lượng muối sau phản ứng.
117g
5.
OPEN ENDED QUESTION
3 mins • 1 pt
Giải thích tại sao dù đứng trước trong dãy hoạt động kim loại nhưng K không tác dụng trực tiếp với dung dịch Na2CO3
Evaluate responses using AI:
OFF
6.
OPEN ENDED QUESTION
3 mins • 1 pt
Giải thích tại sao thân tàu thủy làm bằng sắt thép thường được mạ một lớp Zn
Evaluate responses using AI:
OFF
7.
OPEN ENDED QUESTION
3 mins • 1 pt
Cho 1 mol acid HCl tác dụng với 16.2g kim loại Al. Phương trình được tính theo số mol của:
Evaluate responses using AI:
OFF
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