0Chương 4 : Đại cương về hóa hữu cơ và HidrocacbonCho những thí nghiệm sau : ( a ) Cho dung dịch Al ( NO3 ) 3 tính năng với dung dịch NH3 dư. ( b ) Cho dung dịch KOH dư vào dung dịch AlCl3. ( c ) Cho dung dịch HCl dư vào dung dịch NaAlO2. ( d ) Dẫn khí CO2 dư vào dung dịch KAlO2. ( e ) Sục H2S vào dung dịch Pb ( NO3 ) 2. ( g ) Sục CO2 vào dung dịch Ba ( OH ) 2 dư. Số thí nghiệm thu được kết tủa khi phản ứng kết thúc là A. 4. B. 3. C. 2. D. 5.

nội dung

Cho các thí nghiệm sau:
(a) Cho dung dịch Al(NO3)3 tác dụng với dung dịch NH3 dư
(b) Cho dung dịch KOH dư vào dung dịch AlCl3
(c) Cho dung dịch HCl dư vào dung dịch NaAlO2
(d) Dẫn khí CO2 dư vào dung dịch KAlO2
Số thí nghiệm thu được kết tủa khi phản ứng kết thúc là:

A.A : 1

B.B : 2

C.C : 3

D.D : 4

Đáp án và lời giải
Đáp án : B
Lời giải :- Các phản ứng xảy ra :
( a ) Al ( NO3 ) 3 + 3NH3 + 3H2 OCho dung dịch Al(NO3)3 tác dụng với dung dịch NH3 dư
( b ) AlCl3 + 3N aOHdưCho dung dịch Al(NO3)3 tác dụng với dung dịch NH3 dưAl ( OH ) 3 + NaOHCho dung dịch Al(NO3)3 tác dụng với dung dịch NH3 dư( c ) NaAlO2 + HCl + H2OCho dung dịch Al(NO3)3 tác dụng với dung dịch NH3 dưAl ( OH ) 3 + 3HC lCho dung dịch Al(NO3)3 tác dụng với dung dịch NH3 dư( d ) CO2 dư + KAlO2 + 2H2 OCho dung dịch Al(NO3)3 tác dụng với dung dịch NH3 dư
Vậy có 2 phản ứng tạo kết tủa là ( a ), ( d ) .

Vậy đáp án đúng là B

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

Bài tập trắc nghiệm 15 phút Tổng hợp vô cơ – Tổng hợp Vô cơ 12 – Hóa học 12 – Đề số 40

Làm bài

Chia sẻ

Một số câu hỏi khác cùng bài thi.

  • ( d ) Cho hỗn hợp Na2O và Al2O3 ( tỉ lệ mol 1 : 1 ) vào nước dư .
    ( e ) Cho dung dịch NaHCO3dư vào dung dịch Ca ( OH ) 2 .

    (g) Cho hỗn hợp bột Cu và Fe2O3 (tỉ lệ mol 1 : 1) vào dung dịch HCl dư.

    Sau khi những phản ứng xảy ra trọn vẹn, số thí nghiệm thu được kết tủa là :

Một số câu hỏi khác có thể bạn quan tâm.

  • 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:

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    Question 32:

  • 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:

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    Question 32:

  • 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:

    The warming of the Pacific Ocean has created weather pattern ( 31 ) _______ strongly affect the world. When the water is warm, the amount of rainfall in Indonesia and the surrounding regions decreases. Australia could ( 32 ) _______ 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 ( 33 ) _______ weather forecasters to make long-range weather predictions. They also know that El Nino will bring unusually rain 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 ( 34 ) _______ know about the coming weather with certainty. Now everything has become completely different. El Nino itself used to be predictable. 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 ( 35 ) _______ on the global scale either .

    Question 31:

  • Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions:

    The plan may be ingenious. It will never work in practice .

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    She wasn’t wearing a seat-belt. She was injured .

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  • 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:

    A typical person needs about 1,800 calories per day to stay running. They keep yourorgans operating ( 31 ) ________ and your brain running. They also keep your body toàn thân warm. A person gains weight because he or she consumes more calories per day than necessary. The only way to lose fat is to reduce the number of calories that you consume per day. This is the basic principle ( 32 ) ________ going on a diet. Unfortunately, diets don’t work for most people. They do lose weight but then go off the diet and put it back. Building a sensible diet and exercise plan is the key to maintaining a consistent weight. You need to figure out how many caloriesyou need in a day and how many you actually ( 33 ) ________. The next step is to addexercise so that you can raise the number of calories you can consume per day. Burning 250 or 500 calories per day can make a big ( 34 ) ________. You can ridean exercise bike while you are watching television or you can take the stairs instead of the elevator. Find an exercise partner. Exercises can be a lot easier if there issomeone to talk to. It’s a good idea to wear firm fitting clothes if you are ( 35 ) ________. Tight clothing acts as a reminder of what you are trying to accomplish .

    Question 33:

  • Mark the letter A,B,C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions:

    Women still cover their heads in some countries. They did so in the past .

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