Kiểm tra Hóa 8 - Chủ đề Hiđro
Flashcard
•
Chemistry, Education
•
8th Grade
•
Practice Problem
•
Hard
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10 questions
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1.
FLASHCARD QUESTION
Front
Khí hiđro được dùng để nạp vào khí cầu vì
Back
khí hiđro là khí nhẹ nhất.
2.
FLASHCARD QUESTION
Front
Dẫn khí H₂ dư qua ống nghiệm đựng CuO nung nóng. Hiện tượng quan sát được:
Back
Chất rắn màu đỏ, có hơi nước bám ở thành ống nghiệm.
3.
FLASHCARD QUESTION
Front
Khí hiđro là nhiên liệu sạch, không gây ô nhiễm môi trường khi cháy:
Back
khí hiđro chỉ tạo ra nước.
4.
FLASHCARD QUESTION
Front
Hình không mô tả cách thu khí hiđro?
Back
Hình A
5.
FLASHCARD QUESTION
Front
Al + HCl → AlCl3 + H2. Tỉ lệ nguyên tử, phân tử:
Back
2 : 6 : 2 : 3
6.
FLASHCARD QUESTION
Front
Phương trình hóa học biểu diễn phản ứng thế:
Back
Fe + CuCl₂ → FeCl₂ + Cu
7.
FLASHCARD QUESTION
Front
Tỉ lệ H₂ và không khí để đốt hỗn hợp phát ra tiếng nổ mạnh nhất:
Back
Vₕ₂ / Vₖₖ = 2 / 5
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