Cho X, Y là 2 chất thuộc dãy đồng đẳng của axit acrylic và M_X < M_Y; Z là ancol có cùng số nguyên tử cacbon với X; T là este 2 chức được tạo bởi X, Y và Z. Đốt cháy hoàn toàn 11,09 gam hỗn hợp E gồm X, Y, Z và T cần vừa đủ 13,048 lít khí O₂ (đktc) thu được H₂O và 10,416 lít khí CO₂ (đktc). Mặt khác 11,09 gam E tác dụng tối đa với dung dịch chứa 0,04 mol Br₂. Cho 11,09 gam E tác dụng hết với dung dịch KOH dư, thu được m gam muối. Giá trị của m là

A. 4,61.

B. 5,80.

C. 4,68.

D. 5,04

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks from 45 to 54.

Criticism

It can (45) _________along time to become successful in your chosen field, however talented you are. One thing you have to be (46) _________ of is that you will face criticism along the way. The world is full of people who would rather say something negative than positive. If you’ve made up your (47) _________ to achieve a certain goal, such as writing a novel, don’t let the negative criticism of others prevent you from reaching your (48)_________ and let constructive criticism have a positive (49) _________ on your work. If someone says you’re totally (50) _________ in talent, ignore them. That’s negative criticism. If, however, someone advises you to revise your work and gives you good reasons for doing so, you should (51) _________ their suggestions carefully. There are many film stars who were once out of (52) _________. There are many famous novelists who made a complete (53) _________ of their first novel - or who didn’t, but had to keep on approaching hundreds of publishers before they could get it published. Being successful does depend on luck, to a certain extent. But things are more likely to (54) _________ well if you persevere and stay positive.

Điền vào ô số 47

A. mind 

B. thought 

C. decision 

D. idea

Trong không gian tọa độ Oxyz, cho hai điểm A(-1;0;1), B(-2;1;1). Phương trình mặt phẳng trung trực của đoạn AB là

A. x - y +2= 0

B. x + y + 1 = 0

C. -x + y +1 = 0

D. x - y -2 = 0

Trung hòa 6,75 gam amin no, đơn chức, mạch hở X bằng lượng dư dung dịch HCl. Sau khi phản ứng xảy ra hoàn toàn, thu được 12,225 gam muối. Số đồng phân cấu tạo của X là

A. 2

B. 4

C. 3

D. 1

Read the passage, then choose the best answer by circling the letter A, B, C or D ( 15p ):

In the very distant geological past, all animals were aquatic. The very first vertebrates or animals with backbones, of which we have any fossil record, lived in water. These vertebrates, the fish, were adapted to underwater living. Their streamlined bodies were covered with scales to reduce surface friction: they had muscular tails so that they could swim swiftly in such a dense medium as water; and they were endowed with gills for breathing underwater.

   Descendants of fish-type ancestors crossed the seashore barrier and accommodated themselves to life on land.

 As amphibians, they possessed limbs instead of fins and lungs instead of gills. But they never became completely free of the bonds that tied them to the water; even today many amphibians return to the water to lay their eggs.

   Millions of years after the first clumsy amphibians crawled over the land, newer types of land dwellers appeared, these animals give rise to the present-day reptiles and mammals. They were completely converted for land dwelling, with bodies and biological activities far different from those of fish. With these special adaptations, mammals have been able to colonize the woods and meadows, the deserts and high mountains, often far removed from the sea.  

Animals found desert living possible only……………………. 

A.When they became amphibious

B. When they were fully adapted to land 

C.After they could walk on two feet

D. If they migrated to sea periodically

Cho 4,5 gam amin X đơn chức, bậc 1 tác dụng với lượng vừa đủ dung dịch HCl thu được 8,15 gam muối. Tên gọi của X là:

A. alanin

B. đietyl amin

C. đimetyl amin

D. etyl amin