
trung bình
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KG
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Practice Problem
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Hard
phương nguyễn
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57 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khi cho dung dịch tác dụng với HCl 2N cho kết tủa màu trắng, tủa hóa đen khi thêm NH3 dư. Vậy trong dung dịch có thể có ion nào sau đây:
Ag+
Pb2+
Hg22+
Fe2+
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khi cho H2SO4 2N vào dung dịch muối vô cơ có chứa KMnO4 thấy xuất hiện tủa màu hồng. Vậy trong dung dịch có thể chứa ion nào trong các ion sau:
Ca2+
Ba2+
Mg2+
Pb2+
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hoàn thành phương trình phản ứng sau: Ag+ + KI ® ......(X)..... + K+
AgI↓
Ag+
KI
I-
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hoàn thành phương trình phản ứng sau: Pb2+ + 2Kl ® .......(X)..................
PbI + K+
PbI2 + 2K+
PbI2
PbI2 + K+
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hoàn thành phương trình phản ứng sau: Ca2+ + (NH4)2C2O4 ® ..........(X)............
CaC2O4 + NH4+
CaC2O4
CaC2O4 + 2NH4+
CaC2O4 + 3NH4+
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hoàn thành phương trình phản ứng sau: Fe3+ + 3KSCN ® ............(X).............
Fe(SCN)3 + K+
Fe(SCN)2 + K+
Fe(SCN)3
Fe(SCN)3 + 3K+
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hoàn thành phương trình phản ứng sau: 3Fe2+ +2 K3[Fe(CN)6] ® ........(X)............
Fe2[Fe(CN)6]3 + 6K+
Fe[Fe(CN)3]2 + 6K+
Fe[Fe(CN)2]2 + 6K+
Fe3[Fe(CN)6]2 + 6K+
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