KHOA HỌC TỰ NHIÊN 8 - ÔN TẬP KIỂM TRA CUỐI KÌ 1 - ĐỀ 2
Quiz
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Chemistry
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8th Grade
•
Practice Problem
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Medium
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30 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nung nóng đá vôi (calcium carbonate) thu được vôi sống (calcium oxide) và khí carbon dioxide. Chất tham gia của phản ứng là
Không khí
Calcium oxide
Carbon dioxide
Calcium carbonate
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dụng cụ nào dùng để đựng trộn các hóa chất rắn với nhau hoặc nung các chất ở nhiệt độ cao?
Cốc
Bình tam giác
Ống nghiệm
Bát sứ
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong các hiện tượng sau, hiện tượng nào là hiện tượng vật lí?
Đường cháy thành than
Cơm bị ôi thiu
Sữa chua lên men
Nước hóa đá dưới 0oC
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khối lượng mol có kí hiệu
n
N
m
M
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nếu phản ứng giữa chất N và M tạo ra chất P và Q thì ta có
mN = mM +mQ + mP
mN + mM = mP + mQ
mP = mM + mQ + mN
mQ = mN + mM + mP
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Số nguyên tử có trong 2 mol nguyên tử nhôm (aluminium) là
1,2046 × 1024
1,2046 × 1025
1,2044 × 1024
1,2044 × 1025
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong 1 mol H2O có chứa bao nhiêu nguyên tử hydrogen?
3,011.106
9,022.1023
12,044.1023
6,022.1023
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