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& 2%6uKIỂM TRA 15 PHÚT
MA TRẬN:
Nội dung Nhận biết Thông hiểu Vận dụng thấp
Metan và
axetilen
Viết được công
thức cấu tạo của
axetilen
Câu 1a: 2điểm
Nêu được điểm đặc
biệt trong cấu tạo của
phân tử axetilen
Câu 1b: 3 điểm
Nhận biết được metan,
axetilen dựa vào tính
chất hóa học
Câu 2: 5 điểm
Tổng
0,5 câu-2 điểm 0,5 câu-3 điểm 1 câu-5 điểm
ĐỀ: Câu 1: a) Hãy viết công thức cấu tạo của axetilen? (3 điểm)
b) Cấu tạo phân tử axetilen có gì đặc biệt? (3 điểm)
Câu 2: Trình bày phương pháp hóa học nhận biết 2 khí đựng trong các lọ mất
nhãn sau: metan, axetilen. (4 điểm)
Câu hỏi Đáp án Biểu điểm
1 a) H – C = C – H
b) Trong phân tử axetilen có 1 liên kết 3 C ≡ C, trong liên kết
này có 2 liên kết kém bền, dễ bò phá vỡ khi tham gia phản
ứng hóa học.
2 đ
3đ
2 Đánh dấu, lấy mẫu thử.
Nhỏ vài giọt dung dòch brom vào 2 mẫu thử:
+ Mẫu nào làm mất màu dung dòch brom là axetilen
1đ
1đ
1đ
N+(/>W> 3S
dán nhãn
PTHH: CH≡CH + Br
2(dd)
CHBr = CHBr
+ Mẫu còn lại là metan dán nhãn
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