Một Este Có Công Thức Phân Tử Là C3H6O2 Có Phản ... - Cungthi.online

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Một este có công thức phân tử là C3H6O2 có phản ứng tráng gương với dung dịch AgNO3 trong NH3. Công thức cấu tạo của este đó là công thức nào?  

A.

A: HCOOC3H7

B.

B: HCOOC2H5

C.

C: C2H5COOCH3

D.

D: CH3COOCH3

Đáp án và lời giải Đáp án:B Lời giải:

Este có phản ứng tráng gương → este có gốc axit là HCOO-  

Vậy đáp án đúng là B

 

Câu hỏi thuộc đề thi sau. Bạn có muốn thi thử?

Bài tập trắc nghiệm 45 phút Khái niệm, cấu tạo, đồng phân, danh pháp Este - Hóa học 12 - Đề số 2

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Một số câu hỏi khác cùng bài thi.

• Este X có trong hoa nhài có công thức phân tử C9H10O2, Khi thủy phân X tạo ra ancol thơm Y. Tên gọi của X là:  

• Thủy phân este có công thức phân tử C4H6O2 (với xúc tác axit), thu được 2 sản phẩm hữu cơ X và Y. Từ X có thể điều chế trực tiếp ra Y. Vậy chất X là:  

• Hợp chất X có công thức phân tử C5H8O2, khi tham gia phản ứng xà phòng hóa thu được một anđehit và một muối của axit cacboxylic. Số đồng phân cấu tạo thỏa mãn tính chất trên của X là

• Xà phòng hóa một hợp chất có công thức phân tử C10H14O6 trong dung dịch NaOH dư thu được glixerol và hồn hợp gồm 3 muối (không có đồng phân hình học). Công thức của 3 muối đó là:         

• Hợp chất X có công thức cấu tạo: . Tên gọi của X là:         

• Thủy phân este no đơn chức nào sau đây thu được ancol metylic?

• Este X có tỉ khối hơi so với He bằng 22. Số đồng phân cấu tạo của X là 

• Thủy phân este mạch hở X có công thức phân tử C4H8O2, thu được sản phẩm không có phản ứng tráng bạc. Số công thức cấu tạo phù hợp của X là

• Este X được tạo thành từ axit axetic và ancol metylic có công thức phân tử là:

• Cho sơ đồ phản ứng:        

  (1) X (C5H8O2) + NaOH  X1 (muối) + X2        

  (2) Y (C5H8O2) + NaOH Y1 (muối) + Y2

  Biết X1 và Y1 có cùng số nguyên tử cacbon; X1 có phản ứng với nước brom, còn Y1 thì không. Tính chất hóa học nào giống nhau giữa X2 và Y2:

• Thủy phân este X (C4H6O2) mạch hở trong môi trường axit thu được hai chất hữu cơ Y và Z. Tỉ khối hơi của Z so với H2 bằng 16. Phát biểu nào sau đây đúng?

• Xà phòng hóa hoàn toàn 1 hợp chất có công thức C10H14O6 trong lượng dư dung dịch NaOH thu được hỗn hợp gồm 3 muối (không có đồng phân hình học) và glixerol. Công thức 3 muối lần lượt là :  

• Chất nào sau đây không phải là este ?  

• Este nào sau đây có công thức phân tử C4H8O2?

• Este X có CTPT CH3COOC6H5. Phát biểu nào sau đây về X là đúng         

• Một este có công thức phân tử là C3H6O2 có phản ứng tráng gương với dung dịch AgNO3 trong NH3. Công thức cấu tạo của este đó là công thức nào?  

• Hỗn hợp X gồm hai este đơn chức, mạch hở là đồng phân cấu tạo của nhau. Cho m gam X phản ứng vừa đủ với dung dịch NaOH, thu được dung dịch Y (chỉ chứa 2 muối) và (m – 14,7) gam hỗn hợp hơi gồm 2 anđehit no, đồng đẳng kế tiếp, có tỉ khối hơi so với H2 bằng 24,625. Cô cạn dung dịch Y thu được (m – 3,7) gam chất rắn. Công thức cấu tạo của hai este là    

• Metyl axetat có công thức là 

• Este có CTPT C2H4O2 có tên gọi nào sau đây?  

• Hợp chất X không no mạch hở có công thức phân tử C5H8O2, khi tham gia phản ứng xà phòng hoá thu được một anđehit và một muối của axit hữu cơ. Có bao nhiêu công thức cấu tạo phù hợp với X (không kể đồng phân hình học)?          

• Chất X có công thức phân tử , là este của axit axetic. Công thức cấu tạo thu gọn của X là:  

• Vinyl fomat có công thức phân tử là:           

• Isoamyl axetat là este có mùi chuối chín có khối lượng phân tử là             

• Chất X có công thức cấu tạo CH2=CHCOOCH=CH2. Tên gọi của X là:         

• Etyl axetat có công thức cấu tạo thu gọn là:

Một số câu hỏi khác có thể bạn quan tâm.

• Read the following passage and choose the correct word or phrase that best fits each of the numbered blanks.

  The warming of the Pacific Ocean has created weather patterns (31)__________ strongly affect the  worlD. When the water is warm, the (32)__________ of rainfall in Indonesia and the surrounding regions decreases. Australia could even experience a drought in many parts. On the other hand, Chile (which borders the Pacific Ocean) is preparing for severe rainstorms. In Pakistan and northwestern India, the weather pattern makes the rainy season weaker and makes the area much drier. This happening is called El Nino and is used by weather forecasters to make long-range weather predictions. They also know that El Nino will (33)__________  unusually heavy rains to the southwestern part of the United States and make the central part of the country drier at the same time. According to research, weather forecasters (used to know about the coming weather with certainty. Now everything has become (34)__________  different. El Nino itself used to be (35)__________ . It would occur every two to seven years. But now, this weather pattern is becoming more frequent. We cannot say when and how often tornadoes or cyclones occur. Scientists are unsure of the reason for this change on a global scale either.

  Điền vào ô 33.

• Read the following passage and choose the correct word or phrase that best fits each of the numbered blanks.

  The warming of the Pacific Ocean has created weather patterns (31)__________ strongly affect the  worlD. When the water is warm, the (32)__________ of rainfall in Indonesia and the surrounding regions decreases. Australia could even experience a drought in many parts. On the other hand, Chile (which borders the Pacific Ocean) is preparing for severe rainstorms. In Pakistan and northwestern India, the weather pattern makes the rainy season weaker and makes the area much drier. This happening is called El Nino and is used by weather forecasters to make long-range weather predictions. They also know that El Nino will (33)__________  unusually heavy rains to the southwestern part of the United States and make the central part of the country drier at the same time. According to research, weather forecasters (used to know about the coming weather with certainty. Now everything has become (34)__________  different. El Nino itself used to be (35)__________ . It would occur every two to seven years. But now, this weather pattern is becoming more frequent. We cannot say when and how often tornadoes or cyclones occur. Scientists are unsure of the reason for this change on a global scale either.

  Điền vào ô 34.

• Read the following passage and choose the correct word or phrase that best fits each of the numbered blanks.

  The warming of the Pacific Ocean has created weather patterns (31)__________ strongly affect the  worlD. When the water is warm, the (32)__________ of rainfall in Indonesia and the surrounding regions decreases. Australia could even experience a drought in many parts. On the other hand, Chile (which borders the Pacific Ocean) is preparing for severe rainstorms. In Pakistan and northwestern India, the weather pattern makes the rainy season weaker and makes the area much drier. This happening is called El Nino and is used by weather forecasters to make long-range weather predictions. They also know that El Nino will (33)__________  unusually heavy rains to the southwestern part of the United States and make the central part of the country drier at the same time. According to research, weather forecasters (used to know about the coming weather with certainty. Now everything has become (34)__________  different. El Nino itself used to be (35)__________ . It would occur every two to seven years. But now, this weather pattern is becoming more frequent. We cannot say when and how often tornadoes or cyclones occur. Scientists are unsure of the reason for this change on a global scale either.

  Điền vào ô 35.

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

  The criminal is believed to be living abroad

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

  Astrology greatly interests him.

• Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

  "If I were you, I would never turn the television up late at night" the man told his daughter.

• Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

• Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

• 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.

  Househusbands

  Dear Editor,

  I read with interest the article on American families. In general I agree with it, but there are some important things it left out. It didn't tell the reader much about the life of a househusband. It's not an easy life. I know, because I'm now a househusband myself. A househusband has to change many of his ideas and his ways.

  First of all, he has to change the way he thinks about time. Before I was a househusband, I worked full-time for the New York Times. I was a reporter, and time was always important. We had to finish our article quickly and give them to the editor. Everyone was always in a hurry. This is the way, many other men work, too. Businessmen, lawyers, bankers, and doctors all have to work quickly.

  At home it's different. The househusband cannot be in a hurry all the time. If you rush around, you will make everyone unhappy! The children will be unhappy because they don't understand. For them, time is not important. Your wife will be unhappy because the children are unhappy. You will be unhappy, too, because they are all unhappy. So you have to learn to slow down. That is the first and most important rule for a househusband.

  There is something else the househusband must learn. You must learn to show how you feel about things. At work, men usually do not talk about feelings. If they do, people think they are strange. So, many men are not used to telling anyone about their feelings. They do not know how to talk about their anger, worries, or love. But children need to know how you feel. They need to know how much you love them. If you are angry, they need to know why. Your wife also needs to know about your feelings. If you do not say anything, your family may get the wrong idea. Then there may be serious problems.

  People talk a lot about househusbands these days. Usually they talk about men doing the housework, the cooking, cleaning, and shopping. But in my opinion, these are the easiest things to learn. It was much harder for me to change the way I think and the way I act with my family. I think, other men will also find this harder, but, like me, will find it necessary if they want to have a happy family!

  Ted Diamond

  According to the passage, children _______ .

• 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.

  Househusbands

  Dear Editor,

  I read with interest the article on American families. In general I agree with it, but there are some important things it left out. It didn't tell the reader much about the life of a househusband. It's not an easy life. I know, because I'm now a househusband myself. A househusband has to change many of his ideas and his ways.

  First of all, he has to change the way he thinks about time. Before I was a househusband, I worked full-time for the New York Times. I was a reporter, and time was always important. We had to finish our article quickly and give them to the editor. Everyone was always in a hurry. This is the way, many other men work, too. Businessmen, lawyers, bankers, and doctors all have to work quickly.

  At home it's different. The househusband cannot be in a hurry all the time. If you rush around, you will make everyone unhappy! The children will be unhappy because they don't understand. For them, time is not important. Your wife will be unhappy because the children are unhappy. You will be unhappy, too, because they are all unhappy. So you have to learn to slow down. That is the first and most important rule for a househusband.

  There is something else the househusband must learn. You must learn to show how you feel about things. At work, men usually do not talk about feelings. If they do, people think they are strange. So, many men are not used to telling anyone about their feelings. They do not know how to talk about their anger, worries, or love. But children need to know how you feel. They need to know how much you love them. If you are angry, they need to know why. Your wife also needs to know about your feelings. If you do not say anything, your family may get the wrong idea. Then there may be serious problems.

  People talk a lot about househusbands these days. Usually they talk about men doing the housework, the cooking, cleaning, and shopping. But in my opinion, these are the easiest things to learn. It was much harder for me to change the way I think and the way I act with my family. I think, other men will also find this harder, but, like me, will find it necessary if they want to have a happy family!

  Ted Diamond

  The word "rush" in paragraph 3 is closest in meaning to ______ .

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