
CÂU HỎI TRẮC NGHIỆM KHTN 7
Quiz
•
Science
•
7th Grade
•
Medium
Tien Tran
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đơn chất kim loại là
sodium.
phosphorus.
sulfur.
carbon.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đơn chất phi kim là
aluminium.
sodium.
chlorine.
megnesium.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là hợp chất?
Than chì do nguyên tố C tạo nên.
Khí oxygen do nguyên tố O tạo nên.
Khí nitrogen do nguyên tố N tạo nên.
Khí carbon dioxide do nguyên tố C và O tạo nên.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nguyên tử O khi nhận thêm 2 electron thì tạo thành ion nào?
O+.
O2+.
O-.
O2-.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nguyên tử Ca khi nhường đi 2 electronthì tạo thành ion nào?
Ca+.
Ca2+.
Ca-.
Ca2-.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Khối lượng phân tử CaCO3 là
68 kg.
100 kg.
68 amu.
100 amu.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ở thực vật, sự trao đổi khí với môi trường bên ngoài được thực hiện chủ yếu qua
tế bào biểu mô ở lá cây.
tế bào biểu bì của lá cây.
tế bào khí khổng ở lá cây.
tế bào mô mềm ở lá cây.
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