Câu 10: Hợp chất C₃H₆ có bao nhiêu công thức cấu tạo dạng mạch vòng ?

A. 1 B. 2 C. 3 D. 4

Câu 11: Một hợp chất hữu cơ có công thức C₃H₇Cl , có số công thức cấu tạo là:

A. 4. B. 3. C. 1. D. 2.

Câu 13: Số công thức cấu tạo của C₄H₁₀ là: A. 3. B. 5. C. 2. D. 4.

Bài 1: Nguyên tố A có số hiệu nguyên tử là 17, chu kì 3, nhóm VII. Hãy cho biết:

a. Cấu tạo của nguyên tố A.

b. Tính chất của nguyên tố A và so sánh với các nguyên tố lân cận.

Bài 2: Nguyên tố X có điện tích hạt nhân là 16+; có 3 lớp electron, lớp electron ngoài cùng có 6 electron. Hãy cho biết vị trí của nguyên tố X và tính chất cơ bản của nó.

Cho các oxit sau: K₂O, SO₂, BaO, Fe₂O₃, N₂O₅, Al₂O₃. Trong các chất trên, chất nào tác dụng với:

a. nước (4 pứ) b. dd axit sunfuric (4 pứ)

c. dung dịch Kali hidroxit. (3 pứ)

Viết các PTHH xảy ra

Bài 1: Hoàn thành chuỗi phản ứng sau:

a) Fe₂O₃ → FeCl₃ → Fe(OH)₃ → Fe₂O₃ → Fe → FeSO₄ → Fe(NO₃)₂

b) Al → AlCl₃ → Al(OH)₃ → Al(NO₃)₃ → Al(OH)₃ → Al₂O₃ → Al

c) MnO₂ → Cl₂ → HCl → MgCl₂ → Mg(NO₃)₂ → Mg(OH)₂ → MgO

Bài 2: Bằng phương pháp hóa học, hãy nhận biết (trình bày bằng sơ đồ):

a. 3 dung dịch: HCl ; Na₂SO₄ ; KOH. b. 4 dung dịch: HCl ; H₂SO₄ ; NaOH ; NaCl

c. 4 d: HNO₃ ; NaOH ; Ca(OH)₂ ; HCl d. 3 kim loại: Al ; Fe ; Cu

f. 2 oxit bazơ: CaO và MgO

Nhà văn Nguyễn Dữ đã kết thúc Chuyện người con gái Nam Xương bằng chi tiết Vũ Nương hiện về gặp chồng rồi sau đó biến mất.

Có ý kiến cho rằng: giá như nhà văn để Vũ Nương trở về trần gian sống hạnh phúc cùng chồng con thì kết thúc của truyện sẽ có ý nghĩa hơn. Có người lại nhận xét: cách kết thúc của tác giả như vậy là hợp lí.

Suy nghĩ của em về hai ý kiến trên

\(\left\{{}\begin{matrix}x+y+z=9\\\frac{1}{x}+\frac{1}{y}+\frac{1}{z}=1\\xy+yz+zx=27\end{matrix}\right.\)

1.“You’d better not lend that man any more money, Mary” said John.

A. John advised Mary not to lend that man any more money.

B. John advised Mary to lend that man any more money.

C. John advised Mary not to borrow that man any more money.

D. John advised Mary to borrow that man any more money.

2.Let’s put garbage bins around the school yard.

A. She told me put garbage bins around the school yard. B. Garbage bins should put around the school yard.

C. Garbage bins are put around the school yard. D. I suggest putting garbage bins around the school yard.

3.“Would you like to come to my house for lunch?” she said to me.

A. She asked me to come to her house for lunch. B. She invited me to come to her house for lunch.

C. She told me to come to my house for lunch. D. She invited me to come to my house for lunch.

4. She started learning English two years ago.

A. She has not learnt English before. B. She has started learning English for two years.

C. She has learnt English for two years. D. She has learnt English since two years.

5.My uncle gave up smoking two months ago.

A. My uncle hasn’t smoked for two months. B. The last time my uncle has smoked was two months ago.

C. My uncle hasn’t smoked two months ago. D. My uncle last gave up smoking two months ago.

6. They have worked for this company for five years.

A. They began working for this company five years ago.

B. They haven’t worked for this company for five years.

C. It is five years since they have worked for this company

D. It is the first time they have worked for this company.

7. He last visited the Temple of Literature three months ago.

A. He hasn’t visited the Temple of Literature for three months.

B. He hasn’t visited the Temple of Literature since three months.

C. He didn’t visit the Temple of Literature for three months.

D. His visit to the Temple of Literature lasted three months.

8. Nobody has ever treated me with such kindness.

A. I have never been treated with such kindness. B. I haven’t treated with such kindness.

C. Have never I treated with such kindness. D. I have ever been treated with such kindness.

9. He hasn’t visited his home village for over two years.

A. The last time he visited his home village was over two years ago.

B. He will visit his home village in over two years.

C. His visit to his home village lasted over two years.

D. Over two years ago, he often visited his home village.

10.We haven’t visited our grandparents for two months

A. we visited our grandparents since two months.

B. The last time we visited our grandparents was two months ago.

C. The last time we visited our grandparents was for two months.

a)\(\left\{{}\begin{matrix}x+y+z=9\\\frac{1}{x}+\frac{1}{y}+\frac{1}{z}=1\\xy+yz+zx=27\end{matrix}\right.\)

b)\(\left\{{}\begin{matrix}x-y=7\\x^3+y^3=133\end{matrix}\right.\)

c)\(\left\{{}\begin{matrix}x^2-5x+y=0\\x-\sqrt{y}+1=0\end{matrix}\right.\)

11. The teenagers aren’t buying that model these days.

A. That model isn’t being bought by the teenagers these days.

B. That model isn’t bought these days by the teenagers.

C. On these days that model isn’t being bought due to the teenagers.

D. Because of that model isn’t being bought these days by the teenagers

12. People say that he is the most experienced teacher of English.

A. He is said to be the most experienced teacher of English.

B. He is said the most experienced teacher of English.

C. He said the teacher of English is most experienced.

D. That he is the most experienced teacher of English is said by people.

13. People believe that he is a good teacher.

A. It is believed that he was a good teacher. B. He is believed to be a good teacher.

C. They were really believed he is a good teacher. D. He is believed to have been a good teacher.

14. It is thought that he has died a natural death.

A. He is thought to have died a natural death. B. He is thought to be dying a natural death.

C. He is thought to have been dying a natural death. D. He is thought to die a natural death.

15. The coach said, “It’s time for you to go home, boys!”

A. The coach told the boys that it was time for you to go home.

B. The coach tells the boys that it was time for them to go home.

C. The coach told the boys that it is time for them to go home.

D. The coach told the boys that it was time for them to go home.

16.“Why don’t you go with me?” she asked me.

A. He asked me why I don’t go with him. B. He asked me why didn’t I go with him.

C. He asked me why I didn’t go with him. D. He asked me why he didn’t go with me.

17. Why don’t we recycle bottles and cans?

A. We must recycle bottles and cans, mustn’t we? B. What do we recycle bottles and cans for?

C. Shall we recycle bottles and cans? D. How can we recycle bottles and cans?

18. “Why don’t you use the new car, Mr Son?” said Nam.

A. Nam made Mr Son to use the new car. B. Nam asked Mr Son not to use the new car.

C. Nam suggested that Mr Son use the new car. D. Nam suggested that Mr Son uses the new car.

19“Why don’t you use the new car, Mr. Son?” said Nam

A. Nam made Mr. Son to use the new car. B. Nam asked Mr. Son not to use the new car.

C. Nam suggested that Mr. Son use the new car. D. Nam suggested that Mr. Son uses the new car.

20.“You should not lend Susan any more money, Linda” said Nancy.

A. Nancy advised Susan not to borrow any more money from Linda.

B. Nancy advised Linda not to lend Susan any more money.

C. Linda advised Susan not to lend Linda any more money.

D. Nancy advised Linda to lend Susan some more money.