
KHTN8 CHƯƠNG 2
Authored by LAN LTV
Science
8th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dụng cụ nào dùng để nung các chất ở nhiệt độ cao ?
Cốc.
Bình tam giác.
Ống nghiệm.
Bát sứ.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Quá trình nào sau đây là sự biến đổi vật lí ?
Cho vôi sống CaO vào nước được vôi tôi.
Cồn để trong lọ không kín bị bay hơi.
Khí carbon dioxide làm đục nước vôi trong.
Nung đá vôi thành vôi sống.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dấu hiệu nào giúp ta khẳng định có phản ứng hoá học xảy ra ?
Có chất kết tủa (chất không tan).
Có chất khí thoát ra (sủi bọt).
Có sự thay đổi màu sắc.
Một trong số các dấu hiệu trên.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dung dịch base làm quỳ tím hóa màu gì ?
Hóa đỏ
Hóa vàng
Hóa xanh
Hóa trắng
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mol là lượng chất có chứa NA nguyên tử hay phân tử chất đó ? NA là bao nhiêu?
6,022.1023
6,022.1024
6,022.1025
6,022.1026
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đâu là hợp chất acid ?
NaOH
HCl
CaCl2
CO2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Sulfuric acid có công thức hóa học gì ?
H2SO4
H2SO3
HNO3
H2S
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