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Authored by Phương Trần
Chemistry
9th Grade
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2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Một hydrocarbon ở thể khí thường được dùng làm nhiên liệu để hàn cắt kim loại, đó là
A.etan.
B.ethylene.
C.methane.
D.acetylene
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ứng với công thức phân tử C4H8, có số công thức cấu tạo dạng mạch hở là
A.5.
B.3.
C.2.
D.4.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Các trái cây, trong quá trình chín sẽ thoát ra một lượng nhỏ chất khí là
A.ethylene.
B.methane.
C.etan.
D.acetylene.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Công thức phân tử của ethylene là
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Để tinh chế khí methane có lẫn ethylene và acetylene, ta dùng
A.dung dịch nước bromine dư.
B.dung dịch NaOH dư.
C.dung dịch AgNO3/NH3 dư.
D.dung dịch nước vôi trong dư.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong các chất sau: C2H4, BaCO3, NH3, CO2, C2H5ONa, HCOOH có
A.1 hợp chất hữu cơ và 5 hợp chất vô cơ.
B.2 hợp chất hữu cơ và 4 hợp chất vô cơ.
C.4 hợp chất hữu cơ và 2 hợp chất vơ cơ.
D.3 hợp chất hữu cơ và 3 hợp chất vô cơ.
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