
hoá 6
Authored by Anh Lee
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Professional Development
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48 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1: Số electron lớp ngoài cùng của nguyên tử K (Z=19) là
1
2
3
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2: Công thức của natri hidroxit là
A. Na(OH)2.
B. NaO2.
C. Na2O.
D. NaOH.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3: Cấu hình electron của nguyên tử Li (Z =3) là
A. 1s22s2 2p6 3s1.
B. 1s22s2 2p6.
C. 1s22s1.
D. 1s22s2 2p6 3s23p1.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 4: Chất phản ứng được với dung dịch NaOH tạo kết tủa là
A. KNO3.
B. FeCl3.
C. BaCl2.
D. K2SO4.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 5: Dung dịch làm quỳ tím chuyển sang màu xanh là
A. NaCl.
B. Na2SO4.
C. NaOH.
D. NaNO3.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 6: Sản phẩm tạo thành có chất kết tủa khi dung dịch Na2CO3 tác dụng với dung dịch
A.KCl.
B.KOH.
C.NaNO3.
D.CaCl2.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 7: Khi nhiệt phân hoàn toàn NaHCO3 thì sản phẩm của phản ứng nhiệt phân là
A. NaOH, CO2, H2.
B. Na2O, CO2, H2O.
C. Na2CO3, CO2, H2O.
D. NaOH, CO2, H2O.
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