
hóa cúi kì
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Chemistry
11th Grade
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49 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 1. Có bao nhiêu liên kết đôi trong phân tử penta – 1,3 – đien?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 2. Cho toluen tác dụng với Cl2 trong điều kiện có ánh sáng (tỉ lệ mol 1:1), sản phẩm hữu cơ thu được là
A. m-clotoluen.
B. p-toluen.
C. benzyl clorua.
D. o-clotoluen.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 3. Cho một mẩu CaC2 vào ống nghiệm đựng 1ml nước, xuất hiện chất khí không màu X. Dẫn khí X qua dung dịch AgNO3 trong NH3, ta thấy
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 4. Dãy đồng đẳng của anken có công thức tổng quát là
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 5. Phản ứng nào sau đây chứng minh phenol có tính axit yếu:
A. C6H5OH + Na.
B. C6H5ONa + Br2.
C. C6H5ONa + CO2 + H2O.
D. C6H5OH + NaOH.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 6. Cho m gam ancol X (C2H5OH) tác dụng hoàn toàn với kim loại Na dư, thu được 0,672 lít khí H2 (ở đktc). Giá trị của m là?
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Câu 7. Khi vòng benzen đã có sẵn một nhóm ankyl thì nhóm thế kế tiếp sẽ ưu tiên vào vị trí
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