
hóa 8 hk2 Chi
Authored by Trường THPT Na Hang
Computers
1st Grade
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32 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1. Thành phần của không khí (theo thể tích):
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2. Nhóm các chất nào sau đây đều là axit?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3. Cho dãy chất sau: CO2, P2O5, CaCO3, SO3, Na2O, SiO2, CO, ZnO, PbO, N2O5, NO. Những chất nào là oxit axit?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 5. Tính số gam nước tạo ra khi đốt cháy hoàn toàn 4,48 lít khí hidro (đktc) trong oxi?
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 6. Càng lên cao, tỉ lệ thể tích khí oxi càng giảm vì:
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 7. Đốt cháy 6,2g photpho trong bình chứa 10g oxi. Sau phản ứng chất nào còn dư, vì sao?
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 8. Bằng phương pháp hóa học nhận biết các chất sau: NaCl, axit H2SO4, KOH, Ca(OH)2, bằng cách nào?
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