Cho các chất sau: C₂H₅OH, C₆H₅OH, C₂H₅NH₂, dung dịch C₆H₅NH₃Cl, dung dịch NaOH, CH₃COOH, dung dịch HCl loãng. Cho từng cặp chất tác dụng với nhau có xúc tác, số cặp chất có phản ứng xảy ra là:

A. 10 

B. 11 

C. 9

D. 8

Cho các phát biểu sau:

(a) Anđehit vừa có tính oxi hóa vừa có tính khử.

(b) Phenol không tham gia phản ứng thế.

(c) Nitro benzen phản ứng với HNO₃ đặc (xúc tác H₂SO₄ đặc) tạo thành m-đinitrobenzen.

(d) Dung dịch lòng trắng trứng tác dụng được với Cu(OH)₂ cho dung dịch phức có màu xanh tím.

(e) Nguyên liệu để điều chế CH₃CHO bằng phương pháp hiện đại để là C₂H₂.

Có bao nhiêu phát biểu đúng?

A. 2.                     

B. 3.                     

C. 5.                     

D. 4 .

VIII/ Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions from 56 to 65.

Psychologists have debated a long time about whether a child’s upbringing can give it the ability to do outstandingly well. Some think that it is impossible to develop genius and say that it is simply something a person is born with. Others, however, argue that the potential for great achievement can be develop. The truth lies somewhere between these two extremes.

It seems very obvious that being born with the right qualities from gifted parents will increase a child’s ability to do well. However, this ability will be fully realized only with the right upbringing and opportunities. As one psychologist says, “To have a fast car, you need both a good engine and fuel.”

Scientists have recently assessed intelligence, achievement, and ability in 50 sets of identical twins that were separated shortly birth and brought up by different parents. They found that achievement was based on intelligence, and later influenced by the child’s environment.

One case involving very intelligent twins was quoted. One of the twins received a normal upbringing, and performed well. The other twin, however, was brought up by extremely supportive parents and given every possible opportunity to develop its abilities. That twin, though starting out with the same degree of intelligence as the other, performed even better.

This case reflects the general principle of intelligence and ability. The more favorable the environment, the more a child’s intelligence and ability are developed. However, there is no link between intelligence and socioeconomic level of a child’s family. In other words, it does not matter how poor or how rich a family is, as this does not affect the intelligence.

Gifted people can not be created by supportive parents, but they can be developed by them. One professor of music said that outstanding musicians usually started two or three years earlier than ordinary performers, often because their parents had recognized their ability. These musicians then needed at least ten years’ hard work and training in order to reach the level they were capable of attaining.

People who want to have very gifted children are given the following advice:

-     Marry an intelligent person.

-     Allow children to follow their own interests rather than the interests of the parents.

-     Start a child’s education early but avoid pushing the child too hard.

-      Encourage children to play; for example, playing with musical instrument is essential for a child who wants to become an outstanding musician.

All of the following statements are true EXCEPT x .

A. a child’s intelligence is influenced by that of his/ her parents 

B. studying different twins is useful scientific procedure 

C. educational development depends completely on economic well-being 

D. to become successful, a child need both native intelligence and development

Có các phát biểu sau đây:

(1) Amilozơ có cấu trúc mạch phân nhánh. 

(2) (5) Fructozơ có phản ứng tráng bạc.

(6) Glucozơ tác dụng được với dung dịch thuốc tím.

(7) Trong dung dịch, glucozơ tồn tại chủ yếu ở dạng mạch vòng và một phần nhỏ ở dạng mạch hở.(6) Glucozơ tác dụng được với dung dịch thuốc tím.

(7) Trong dung dịch, glucozơ tồn tại chủ yếu ở dạng mạch vòng và một phần nhỏ ở dạng mạch hở.

Số phát biểu đúng là:

A. 6                      

B. 5                      

C. 3                      

D. 4

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 42 to 48

Today, there are 600 million cars in the world. They may seem like a lot. However, there are over 7 million people on our planet. Most of the world’s population uses public transportation to get around. The number of people using public transportation continues to rise. Subway systems worldwide carry 155 million passengers each day. That’s more than 30 times the number carried by all the world’s airplanes. Every day in Tokyo passengers take more than 40 million rides on public transportation.

Yet many people see public transportation as ‘a depressing experience’, says author Taras Gresco. They say it is slow, crowded, or too expensive. In fact, Gresco says, it is actually ‘faster, more comfortable and cheaper’ than driving a car.Like millions of people, Taras Gresco is a ‘straphanger’ - a person who rides public transportation. In his book straphanger: Saving Our Cities and Ourselves from the Automobile, Gresco describe the benefits of public transportation. Firstly, it is better for the environment. When people use public transportation, they use less fuel. Twenty people on one bus use much less fuel than 20 people in 20 cars. Fewer cars mean less pollution and cleaner air.

Using public transportation can be good for your health in other ways. It can even help you lose weight. In one study, a group of people took public transportation every day for six months. Each day they walked to a bus stop or train station. In six months, each person lost an average of six pounds - almost three kilograms. Taking public transportation has another benefit, says Gresco. It helps people become part of their community. When you are alone in your car, you don’t talk to anyone. One Tokyo straphanger told Gresco, “To use public transport is to know how to cooperate with other people,’ It teaches you ‘how to behave in a public space’. So, public transportation is more than a way to get to work or school. It can help lead to cleaner cities. It may also lead to a healthier and more cooperative world population.

Which of the following can be the best title of the reading passage?

A. Public Transportation _ We all Benefit 

B. Public transportation - to Save the Environment 

C. Public Transportation - a way to Loose Weight. 

D. public transportation - Cleaner - Cities

Ankađien là :

A. hiđrocacbon, mạch hở có công thức là C_nH_2n-2.

B. hiđrocacbon có công thức là C_nH_2n-2.

C. hiđrocacbon có 2 liên kết đôi C=C trong phân tử.

D. hiđrocacbon mạch hở, có 2 liên kết đôi C=C trong phân tử.

Este X đơn chức, mạch hở có tỉ khối hơi so với oxi bằng 3,125. Đốt cháy hoàn toàn 0,3 mol hỗn hợp E chứa X và hai este Y, Z (đều no, mạch hở, không phân nhánh) cần dùng 1,125 mol O₂, thu được 1,05 mol CO₂. Mặt khác, đun nóng 67,35 gam E với đung dịch KOH vừa đủ thu được hỗn hợp chứa hai ancol có cùng số nguyên tử cacbon và hỗn hợp hai muối có khối lượng m gam. Giá trị của m gần nhất với giá trị nào sau đây?

A. 82,9

B. 83,9.

C. 64,9

D. 65,0

Bảng dưới đây ghi lại hiện tượng khi làm thí nghiệm với các chất sau ở trạng thái lỏng (nguyên chất hoặc dung dịch nước): X, Y, Z, T và Q

 Chú thích :  (-) không có phản ứng;  (+) có phản ứng

Các chất X, Y, Z, T và Q lần lượt là

A. Isopren, metyl acrylat, p-xilen, axit fomic, fructozơ

B. Vinylaxetylen, fructozơ, o-xilen, metylacrylat, anđehit fomic

C. 3- metylbut-1-in, hexametylenđiamin, m-xilen, phenol, metanal

D. Pen-2-en, benzen, toluen, axit axetic, axetanđehit

X, Y, Z, T là một trong những chất hữu cơ sau: HCHO, CH₃CHO, HCOOH, CH₃COOH. Cho bảng số liệu sau:

Nhận định đúng là

A. Y là HCOOH

B. T là CH₃CHO

C. X là HCHO

D. Z là CH₃COOH