hoa 11. ĐIỆN LY
Quiz
•
Chemistry
•
11th - 12th Grade
•
Practice Problem
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Medium
Dương Lãnh
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1: Dung dịch chất nào sau không dẫn điện?
C2H5OH
NaCl
NaHCO3.
CuSO4
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2. (ĐH B-2008) Cho dãy các chất: KAl(SO4)2.12H2O, C2H5OH, C12H22O11 (saccarozơ), CH3COOH, Ca(OH)2, CH3COONH4. Số chất điện li là:
2
3
4
5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3. Chỉ ra câu trả lời sai về pH
pH = - lg[H+]
[H+] = 10a thì pH = a
pH + pOH = 14
[H+].[OH-] = 10-14
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất chất lưỡng tính là ?
NH4Cl
(NH4)2SO4
(NH4)2CO3
NH4NO3
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hidroxit nào sau đây không phải là hidroxit lưỡng tính?
Pb(OH)2
Al(OH)3
Zn(OH)2
Ca(OH)2
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Dung dịch X chứa 0,2 mol Ca2+; 0,15 mol Mg2+; 0,4 mol Cl– và a mol HCO3–. Đun dung dịch X đến cạn thu được muối khan có khối lượng là :
43,8 g.
44,1g
34,8g
45,5g
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là chất điện li?
ancol etylic
.glucozơ
saccarozơ
axit sunfuric
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