
giua ki 1 hoa 11 dcm
Quiz
•
Science
•
10th Grade
•
Practice Problem
•
Easy
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31 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
chất nào sau đây là chất điện li
cl2
hno3
MgO
CH4
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
chất nào sau đây là chất điện li mạnh
NaOH
CO2
H2O
H2S
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
dung dịch nào sau đây có pH >7
NaNO3
KCl
H2SO4
KOH
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ứng dụng nào sau đây KHÔNG PHẢI ứng dụng của Nitrogen ?
bảo quản mẫu thực vật trong y học
tạo khí quyển trơ
sx phân lân
bảo quản thực phẩm
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
ở nhiệt độ cao, N2 thể hiện tính khử khi phản ứng với đơn chất nào sau đây ?
MgO
O2
Ca
H2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
tính base của ammonia dc thể hiện qua phản ứng nào ?
NH3+HCl—-> NH4Cl
4NH3+5O2——-> 4NO+6H2O
4NH3+3O2—> 2N2+6H2O
2NH3+3CuO—->3Cu+2N2
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
phát biểu nào sau đây không đúng?
các muối ammonium đều dễ tan trong nước
dung dịch muối ammonium phân li hoàn toàn thành ion
các muối ammonium đều kém bền với nhiệt, khi đun nóng bị phân huỷ thành ammonia và acid tương ứng
muối ammonium tác dụng với dung dịch kiềm giải phóng ammonia
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