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• Phần trăm khối lượng của nguyên tố oxi trong glucozơ là         

Câu 1:

Phần trăm khối lượng của nguyên tố oxi trong glucozơ là         

A.

A: 44,44%

B.

B: 53,33%

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 - CTPT của glucozơ là C6H12O6 có %O =   

Vậy đáp án đúng là B

C.

C: 51,46%

D.

D: 49,38%

Những câu hỏi này đến từ bài kiểm tra này. Bạn có muốn thực hiện bài kiểm tra thử không?

Bài tập trắc nghiệm 15 phút Khái niệm, cấu trúc phân tử, trạng thái tự nhiên Glucozơ - Hóa học 12 - Đề số 5

• 15 phút
• 10 câu hỏi

Làm bài kiểm tra

Một số câu hỏi từ cùng một bài kiểm tra

• Những phản ứng hóa học lần lượt để chứng minh rằng phân tử glucozơ có nhóm chức CHO và có nhiều nhóm OH liền kề nhau là:     

• Chất nào dưới đây là monosaccarit?

• Glucozo còn được gọi là:         

• Để chứng minh glucozơ có tính chất của andehit, ta cho dung dịch glucozơ phản ứng với?         

• Thí nghiệm nào sau đây chứng tỏ trong phân tử glucozơ có nhiều nhóm OH kề nhau?    

• Phát biểu đúng về cacbohiđrat là:

• Số nguyên tử oxi trong phân tử glucozơ là

• Để phân biệt các dung dịch glucozơ, saccarozơ và hồ tinh bột có thể dùng dãy chất nào sau đây làm thuốc thử ?         

• Phần trăm khối lượng của nguyên tố oxi trong glucozơ là         

• Đồng phân của glucozơ:

Một số câu hỏi khác bạn có thể quan tâm

• Only 300 for that laptop? That’s a real ________!

• Read the email and choose the best options. Hi Nick, Great to receive your email. Because you’ll be here soon, I’d like to share with you my family customs and traditions. Well, we have the custom (17) ____ spending Saturdays together. You may ask why not Sundays. It’s simply because my mum works on Sundays. On Saturdays, we always (18)____ out. Sometimes we visit our grandparents in Vung Tau. Sometimes we go on a picnic in the park on a nearby beauty spot.You ask me about Tet holiday, right? There’s a (19) ____ that we make tetcake and cook braised pork and eggs. Tetcake is similar to chungcake in Ha Noi, but it’s long, not square. Braised pork and eggs is our traditional (20) ____ for Tet. It’s so delicious! When you come here, my mum will cook it for you.What about your family? Share with me the customs and traditions you follow. Cheers, Ha.

  Well, we have the custom (17) ____ spending Saturdays together.

• Hai điểm M và N nằm trên cùng một đường sức của một điện trường đều có cường độ E, hiệu điện thế giữa M và N là UMN, khoảng cách MN = d. Công thức nào sau đây không đúng?

• Read the following passage and mark the letter A, B, C, or D on your answer answer to each of the questions.

  One of the most interesting authors of the twentieth century, J.R.R. Tolkien, achieved fame through his highly inventive trilogy, The Lord of the Rings. Born in 1892, Tolkien received his education from Oxford and then served in World War I. After the war, he became a professor of Anglo-Saxon and English language and literature at Oxford University.

  Although published in 1965, the three books that comprise The Lord of the Rings were written in intervals from 1936 to 1949. This was mainly due to Tolkien’s responsibilities as a professor and the outbreak of World War II. By the late 1960s, this fascinating trilogy had become a sociological phenomenon as young people intently studied the mythology and legends created by Tolkien. The trilogy is remarkable not only for its highly developed account of historical fiction but also its success as a modern heroic epic. The main plot chronicles the struggle between good and evil kingdom as they try to acquire a magic ring that has the power to rule the world. The novels, which are set in a time called Middle Earth, describe a detailed fantasy world. Established before humans populated the Earth, Middle Earth was inhabited by good and evil creatures such as hobbits, dwarves, elves, monsters, wizards, and some humans. The characters and the setting of Middle Earth were modeled after mythological stories from Greece and Northern Europe.

  Although readers have scrutinized the texts for inner meaning and have tried to connect the trilogy with Tolkien’s real life experiences in England during World War II, he denies the connection. He claims that the story began in his years as an undergraduate student grew out of his desire to create mythology and legends about elves and their language.

  Tolkien was a masterful fantasy novelist who used his extensive knowledge of folklore to create a body or work that is still read and enjoyed throughout the world today.

  The following sentence could be added to paragraph 2. Where would it best fit into this paragraph?

  “Once the ring is found by hobbit, a wizard selects a group to take the ring to the volcano where it was forged and destroy it.”

• 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.

  For many people who live in cities, parks are an important part of the landscape. They provide a place for people to relax and play sports, as well as a refuge from the often harsh environment of a city. What people often overlook is that parks also provide considerable environmental benefits.

            One benefit of parks is that plants absorb carbon dioxide - a key pollutant - and emit oxygen, which humans need to breathe. According to one study, an acre of trees can absorb the same amount of carbon dioxide that a typical car emits in 11,000 miles of driving. Parks also make cities cooler. Scientists have long noted what is called the Urban Heat Island Effect: building materials such as metal, concrete, and asphalt absorb much more of the sun’s heat and release it much more quickly than organic surfaces like trees and grass. Because city landscapes contain so much of these building materials, cities are usually warmer than surrounding rural areas. Parks and other green spaces help to mitigate the Urban Heat Island Effect.

            Unfortunately, many cities cannot easily create more parks because most land is already being used for buildings, roads, parking lots, and other essential parts of the urban environment. However, cities could benefit from many of the positive effects of parks by encouraging citizens to create another type of green space: rooftop gardens. While most people would not think of starting a garden on their roof, human beings have been planting gardens on rooftops for thousands of years. Some rooftop gardens are very complex and require complicated engineering, but others are simple container gardens that anyone can create with the investment of a few hundred dollars and a few hours of work.

            Rooftop gardens provide many of the same benefits as other urban park and garden spaces, but without taking up the much-needed land. Like parks, rooftop gardens help to replace carbon dioxide in the air with nourishing oxygen. They also help to lessen the Urban Heat Island Effect, which can save people money.

            In the summer, rooftop gardens prevent buildings from absorbing heat from the sun, which can significantly reduce cooling bills. In the winter, gardens help hold in the heat that materials like brick and concrete radiate so quickly, leading to savings on heating bills. Rooftop vegetable and herb gardens can also provide fresh food for city dwellers, saving them money and making their diets healthier. Rooftop gardens are not only something everyone can enjoy, they are also a smart environmental investment.

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• - “Your parents must be proud of your results at school". 

   - “______”