Hình vẽ sau mô tả thí nghiệm điều chế khí Z:

A.H₂SO₄ đặc + Na₂SO₃ rắn ® SO₂ + Na₂SO₄ + H₂O

B.HCl dung dịch + Zn ® ZnCl₂ + H₂

C.Ca(OH)₂ dung dịch + NH₄Cl rắn ® NH₃ + CaCl₂ + H₂O

D.MnO₂ + HCl đặc ® MnCl₂ + Cl₂ + H₂O

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

                                                    THE EARTH GALLERIES
To many people, the word ‘geology’ conjures up rather dull image of lumps of rock in glass cases. People tend to regard geology as an academic subject that you don’t need to know about (56)________you have to study it at school. If you visit te Earth Galleries at London’s Natural history Museum, however, you’ll (57)________that this image couldn’t be further from the truth.

      The aim of the exhibition is not to procedure future geologists, but rather to inspire interest in a subject which is relevant to everyday life. The Earth Galleries turn the traditional idea of geological museum (58)________, literacy because you begin at the top. The central space in the museum is a glass-topped atrium. As you enter, you (59)________up to the top of this by escalator. On the (60)________, the escalator passed through a massive revolving globe, measuring eleven metres (61)________diameter. This represents a planet, not necessarily the Earth. (62)________at the top, you work your way down through the six different exhibitions that (63)________the museum.

      The individual exhibitions explain natural phenomena such as earthquakes and volcanoes as well as looking at the Earth’s energy (64)________and where our most common building (65)__________come from. These exhibitions allow everyone to appreciate the fascination of geology. 
Question 61

A. on

B. around

C. across

D. in

Hỗn hợp Y gồm 2 aminoaxit (phân tử mỗi chất chứa 2 nhóm – NH₂ và 1 nhóm –COOH). Đốt cháy hoàn toàn m gam Y thu được 0,56 gam N₂. Nếu cho m gam Y tác dụng vừa đủ với a gam dung dịch HCl 20%. Giá trị của a là

A. 3,65.

B. 0,73.

C. 7,30.

D. 1,46.