Đốt cháy hoàn toàn m gam chất béo X (chứa triglixerit của axit stearic, axit panmitic và các axit béo tự do đó). Sau phản ứng thu được 6,72 lít CO₂ (đktc) và 5,22 gam nước. Xà phòng hoá m gam X (hiệu suất = 90%) thì thu được khối lượng glixerol là:         

Thủy phân hoàn toàn 6,8 gam este đơn chức X trong 100 gam dung dịch NaOH 20% đun nóng, thu được dung dịch Y. Trung hòa kiềm dư trong Y cần dùng 200ml dung dịch H₂SO₄ 1M. Sau khi các phản ứng xảy ra hoàn toàn, thu được dung dịch chứa m gam hỗn hợp muối. Giá trị của m là:

Đốt cháy hoàn toàn m gam chất béo X (chứa triglixerit của axit stearic, axit panmitic và các axit béo tự do đó). Sau phản ứng thu được 6,72 lít CO₂ (đktc) và 5,22 gam nước. Xà phòng hoá m gam X (hiệu suất = 90%) thì thu được khối lượng glixerol là:         

Hợp chất hữu cơ X thuần chức (chỉ chứa C,H,O). 5,8 gam X tác dụng với lượng dư AgNO₃ trong NH₃ được 43,2 gam Ag. Hydro hóa hoàn toàn 0,1 mol X được chất Y. Toàn bộ Y phản ứng vừa hết 4,6 gam Natri. Đốt cháy hoàn toàn X thu được:

Metyl axetat bị khử bởi LiAlH₄ thu được sản phẩm?     

Thủy phân 8,8 gam etyl axetat bằng 200 ml dung dịch NaOH 0,2M. Sau khi phản ứng xảy ra hoàn toàn, cô cạn dung dịch, thu được m gam chất rắn khan. Gía trị của m là:      

Đốt cháy hoàn toàn 1,53 gam este X thu được 3,3 gam CO2 và 1,35 gam H2O. Công thức phân tử của X là.         

Thủy phân este X no đơn chức mạch hở trong môi trường axit thu được axit cacboxylic Y và ancol Z có cùng số nguyên tử cacbon. Đem nung Z với  đặc thu được hợp chất hữu cơ T có tỉ khối so với Z bằng 1,7. Y là axit:         

  Xà phòng hóa este nào sau đây thu được sản phẩm có khả năng tham gia phản ứng tráng bạc

Cho các este: etyl fomat (1), vinyl axetat (2), triolein (3), metyl acrylat (4), phenyl axetat (5). Dãy gồm các este đều phản ứng được với dung dịch NaOH (đun nóng) sinh ra ancol là:

Hỗn hợp M gồm axit cacbonxylic X và este Y (đều đơn chức và cùng số nguyên tử cacbon). Cho m gam M phản ứng vừa đủ với dung dịch chứa 0,25 mol NaOH, sinh ra 18,4 gam hỗn hợp hai muối. Mặt khác, cũng cho m gam M trên tác dụng với lượng dư dung dịch AgNO₃ trong NH₃ đung nóng kết thúc phản ứng thu được 32,4 g Ag. Công thức của X và giá trị của m lần lượt là ?        

Reading the following passage and mark the letter A,B,C or D on your anwer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

The latest addiction to trap thousands of people is the Internet, which has been (31)____ for broken relationships, job losses, financial ruin and even one suicide. Psychologists now recognize Internet Addiction Syndrom (IAS) as a new illness that could (32)______ serious problems and ruin many lives. Special help groups have been set up to offer suffers help and support. IAS is similar to (33)_____ problems like gambling, smoking and drinking: addicts have dreams about the Internet, they need to use it first thing in the morning; they lie to their partner about how much time they spend online; they wish they could cut down, but are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet; although they felt guilty, they became depressed if they were (34) ___________ to stop using it. Almost anyone can be at risk. Some of the addicts are teenagers who are already hooked on computer games and who (35) ___________ it very difficult to resist the games on the Internet. Surprisingly, however, psychologists say that most victims are middle-aged housewives who have never used a computer before.  

Question 32:

Reading the following passage and mark the letter A,B,C or D on your anwer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

The latest addiction to trap thousands of people is the Internet, which has been (31)____ for broken relationships, job losses, financial ruin and even one suicide. Psychologists now recognize Internet Addiction Syndrom (IAS) as a new illness that could (32)______ serious problems and ruin many lives. Special help groups have been set up to offer suffers help and support. IAS is similar to (33)_____ problems like gambling, smoking and drinking: addicts have dreams about the Internet, they need to use it first thing in the morning; they lie to their partner about how much time they spend online; they wish they could cut down, but are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet; although they felt guilty, they became depressed if they were (34) ___________ to stop using it. Almost anyone can be at risk. Some of the addicts are teenagers who are already hooked on computer games and who (35) ___________ it very difficult to resist the games on the Internet. Surprisingly, however, psychologists say that most victims are middle-aged housewives who have never used a computer before.  

Question 33:

Reading the following passage and mark the letter A,B,C or D on your anwer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

The latest addiction to trap thousands of people is the Internet, which has been (31)____ for broken relationships, job losses, financial ruin and even one suicide. Psychologists now recognize Internet Addiction Syndrom (IAS) as a new illness that could (32)______ serious problems and ruin many lives. Special help groups have been set up to offer suffers help and support. IAS is similar to (33)_____ problems like gambling, smoking and drinking: addicts have dreams about the Internet, they need to use it first thing in the morning; they lie to their partner about how much time they spend online; they wish they could cut down, but are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet; although they felt guilty, they became depressed if they were (34) ___________ to stop using it. Almost anyone can be at risk. Some of the addicts are teenagers who are already hooked on computer games and who (35) ___________ it very difficult to resist the games on the Internet. Surprisingly, however, psychologists say that most victims are middle-aged housewives who have never used a computer before.  

Question 34:

Reading the following passage and mark the letter A,B,C or D on your anwer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

The latest addiction to trap thousands of people is the Internet, which has been (31)____ for broken relationships, job losses, financial ruin and even one suicide. Psychologists now recognize Internet Addiction Syndrom (IAS) as a new illness that could (32)______ serious problems and ruin many lives. Special help groups have been set up to offer suffers help and support. IAS is similar to (33)_____ problems like gambling, smoking and drinking: addicts have dreams about the Internet, they need to use it first thing in the morning; they lie to their partner about how much time they spend online; they wish they could cut down, but are unable to do so. A recent study found that many users spend up to 40 hours a week on the Internet; although they felt guilty, they became depressed if they were (34) ___________ to stop using it. Almost anyone can be at risk. Some of the addicts are teenagers who are already hooked on computer games and who (35) ___________ it very difficult to resist the games on the Internet. Surprisingly, however, psychologists say that most victims are middle-aged housewives who have never used a computer before.  

Question 35:

Read the following passage and mark the letter A,B ,C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks:

Organized football games began in 1863. In football, two (31)_____ of eleven players try to kick or head the ball into the goal of the other team. The goal keeper, (32)_____tries to keep the ball out of the goal, is the only player on the field who can touch the ball with his or her hands. The other players must use their feet, heads and bodies to (33)_____ the ball. Every four years, football teams around the world (34)_____ for the World Cup. The World Cup competition started in 1930. Brazil is the home of many great football players, including the most famous player of all, Pele’. With his fast dazzling speed, Pele’ played for many years in Brazil and then in New York. People in more than 140 countries (35)_____ the world play football. It is definitely the world’s most popular sport.  

Question 35:

Read the following passage and mark the letter A,B ,C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks:

Organized football games began in 1863. In football, two (31)_____ of eleven players try to kick or head the ball into the goal of the other team. The goal keeper, (32)_____tries to keep the ball out of the goal, is the only player on the field who can touch the ball with his or her hands. The other players must use their feet, heads and bodies to (33)_____ the ball. Every four years, football teams around the world (34)_____ for the World Cup. The World Cup competition started in 1930. Brazil is the home of many great football players, including the most famous player of all, Pele’. With his fast dazzling speed, Pele’ played for many years in Brazil and then in New York. People in more than 140 countries (35)_____ the world play football. It is definitely the world’s most popular sport.  

Question 34:

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

In the 1998 World Cup, sports fans around the world (31) ________ various battles between fierce football rivals but also between the companies that sponsored them. Nike sponsored Brazil. Adidas sponsored France. While the teams (32) ________ for the biggest prize in football, the two companies tried to win the biggest battle, the battle of the brands as 500 million people from 195 countries turn in to watch the greatest footballers in the world. Afterwards, the sportswear companies hope was for people to go out and buy some new kits. Adidas paid $20 million for the privilege of being an official sponsor of the 1998 World Cup and so one might have assumed it would have had the greatest presence at the (33) ________. Sometimes, however, sponsoring doesn’t (34) ________ the company much good. Other times, the sponsors advertising campaigns are very original. Nike has claimed that if sponsors really want to support athletes, they can’t turn up only for the photo opportunities and the media events and smile and (35) ________ for the cameras. They have to accept the whole package with its spitting, swearing, sweating and blistering-breaking. They just have to get used to it.

Question 34:        

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

In the 1998 World Cup, sports fans around the world (31) ________ various battles between fierce football rivals but also between the companies that sponsored them. Nike sponsored Brazil. Adidas sponsored France. While the teams (32) ________ for the biggest prize in football, the two companies tried to win the biggest battle, the battle of the brands as 500 million people from 195 countries turn in to watch the greatest footballers in the world. Afterwards, the sportswear companies hope was for people to go out and buy some new kits. Adidas paid $20 million for the privilege of being an official sponsor of the 1998 World Cup and so one might have assumed it would have had the greatest presence at the (33) ________. Sometimes, however, sponsoring doesn’t (34) ________ the company much good. Other times, the sponsors advertising campaigns are very original. Nike has claimed that if sponsors really want to support athletes, they can’t turn up only for the photo opportunities and the media events and smile and (35) ________ for the cameras. They have to accept the whole package with its spitting, swearing, sweating and blistering-breaking. They just have to get used to it.

Question 35:        

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

My home is in the air – I do an enormous amount of travelling. It is a fast life and full of work, but I like it and that is the only way (31)..................me. Everything is tiring – music, travelling – but what can I do? I am not (32).................to complaining. It is hart to imagine now that I will never be very long in one place. My home town is on the Caspian Sea. There is sea, wind, sun and too many tourists and hotels. I have my own flat with four or five rooms. But I am seldom there. If I am there for a day or two I prefer to (33)................ with my mother and grandmother. They live in a small house, but it is very comfortable and my mother cooks for me. I like good, simple food. I have no wife, no brothers or sisters and my father died when I was seven. He was an engineer and I don’t ( 34).............him very well. He liked music very much and wanted me to (35)..............a musician.

Question 35:

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 31 to 35:

My home is in the air – I do an enormous amount of travelling. It is a fast life and full of work, but I like it and that is the only way (31)..................me. Everything is tiring – music, travelling – but what can I do? I am not (32).................to complaining. It is hart to imagine now that I will never be very long in one place. My home town is on the Caspian Sea. There is sea, wind, sun and too many tourists and hotels. I have my own flat with four or five rooms. But I am seldom there. If I am there for a day or two I prefer to (33)................ with my mother and grandmother. They live in a small house, but it is very comfortable and my mother cooks for me. I like good, simple food. I have no wife, no brothers or sisters and my father died when I was seven. He was an engineer and I don’t ( 34).............him very well. He liked music very much and wanted me to (35)..............a musician.

Question 34: