
ktra lý thuyết
Authored by Phạm Yến
Chemistry
1st - 12th Grade
Used 2+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dung dịch nào sau đây có khả năng dẫn điện?
A. Dung dịch đường.
B. Dung dịch muối ăn.
C. Dung dịch rượu.
D. Dung dịch benzen trong ancol.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dãy nào dưới dây chỉ gồm chất điện li mạnh?
A. HBr, Na2S, Mg(OH)2, Na2CO3.
B. H2SO4, NaOH, NaCl, HF.
C. HNO3, H2SO4, KOH, K2SiO3.
D. Ca(OH)2, KOH, CH3COOH, NaCl.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dãy chất nào sau đây, trong nước đều là chất điện li yếu?
A. H2S, H2SO3, H2SO4.
B. H2CO3, H3PO4, CH3COOH, Ba(OH)2.
C. H2S, CH3COOH, HClO.
D. H2CO3, H2SO3, HClO, Al2(SO4)3.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Trong dung dịch axit nitric (bỏ qua sự phân li của H2O) có những phần tử nào?
A. H+, NO3-.
B. H+, NO3-, H2O.
C. H+, NO3-, HNO3.
D. H+, NO3-, HNO3, H2O.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Cho dãy các chất: KAl(SO4)2.12H2O, C2H5OH, C12H22O11 (saccarozơ), CH3COOH, Ca(OH)2, CH3COONH4. Số chất điện li là
A. 3
B. 4
C. 5
D.6
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dung dịch chất nào sau đây không làm đổi màu quỳ tím?
A. HCl.
B. Na2SO4.
C. Ba(OH)2.
D. HClO4.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Đối với dung dịch axit yếu CH3COOH 0,10M, nếu bỏ qua sự điện li của nước thì đánh giá nào về nồng độ mol ion sau đây là đúng?
A. [H+] = 0,10M.
B. [H+] < [CH3COO-].
C. [H+] > [CH3COO-].
D. [H+] < 0,10M.
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