
hoa hoc
Authored by Phúc Hoàng
Chemistry
12th Grade
Used 13+ times

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39 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dãy nào là dãy kim loại kiềm
Li, Na, Ca, Fe, K, Cl
Li, Na, K, Rb, Cs, Fr
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
hợp chất kim loại kiềm số oxi hóa
+1
+2
+3
+4
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
nước cứng chứa nhiều?
Na+, K+.
Mg2+, Ca2+.
Be2+, Ba2+.
Cl‑, HCO3-
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kim loại kiềm có tính khử mạnh nhất trong tất cả các kim loại là do nguyên nhân nào sau đây?
Kim loại kiềm dễ nóng chảy nhất nên dễ nhường electron.
Kim loại kiềm nhẹ nhất nên dễ nhường electron.
Kim loại kiềm có năng lượng ion hoá I1 nhỏ nhất.
Kim loại kiềm chỉ có số oxi hóa +1 trong các hợp chất.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phương pháp điều chế sắt:
Nhiệt luyện dùng CO khử oxit sắt
Nhiệt nhôm dùng Al để khử oxit sắt
Thủy luyện dùng kim loại mạnh đẩy muối sắt ví dụ như Al
Điện phân dung dịch muối sắt
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Na + H20 => ?
2Naoh + H2
2KOH+ H2
Naoh + H2O
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
K + H2O => ?
2KOH + H2
KOH + H2
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