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Bài 5.  Viết PT chữ cho các hiện tượng hoá học sau:

a.     Cho vôi sống vào nứơc được vôi tôi ( canxi hiđroxit)

b.     Đốt phốt pho đỏ trong không khí được điphốtpho penta oxit

c.      Nhiệt phân muối kaliclorat thu được kaliclorua và khí oxi

d.     Thả một mẩu kim loại kẽm vào dd axit clohiđric thấy có khí hiđro bay lên ,cô cạn dd thu được muối kẽm clorua.

e.      Thả mẩu đá vôi ( canxi cacbonat) và dung dich axit sunfuric thu được canxi sunfat, khí cacbonic và nước

Đốt cháy hoàn toàn 16,2 gam một cacbohidrat X thu được 13,44 lít khí CO₂ (đktc) và 9,0 gam nước.

a) Tìm công thức đơn giản nhất của X. X thuộc loại cacbohiđrat nào đã học?

b) Đun 16,2 gam X trong dung dịch axit thu được dung dịch Y. Cho Y tác dụng với lượng dư dung dịch AgNO₃/NH₃ thu được bao nhiêu gam Ag? Giả sử hiệu suất của quá trình bằng 80%.

1. ………….is only a short walk from my house to the cinema. A. There B. It C. This D. That

2. There are far more opportunities for young people than there …… A. was   B use  C. used  D. used to be

3. There is nothing very ……….to do in that small town. A. interest B. interested C. interesting D. interestingly

4. Cyclists must …………………….for pedestrians when they are cycling along the country lane.

A. see off B. look out C. avoid D. observe

5. In Britain there is an enormous market for …….pizzas. A. freeze  B. freezing C. froze D. frozen

6. The new film has good audience figures …………………….poor reviews in the press.

A. despite B. in spite C. although D. nevertheless

7. Sales are poor now. There may, .….,be an increase before Christmas. A. however B. although C. even if  D. but

8. – “…………………….did you first meet Kaye, Khanh?”    - “In Da Nang last summer.”

A. Where B. Why C. What D. How

9. He became …………………….when a journalist asked him questions about his private life.

A. embarrass B. embarrassed C. embarrassing D. embarrassingly

10. …………………….do the buses run? – Every ten minutes.

A. How B. How many C. How often D. What time

III. Who are these notices for? Mark A, B, or C for your answers.

1. Roadwork ahead. A. Drivers B. Workers C. Customers

2. First class ticket holders only. A. People at a museum   B. People in a cinema  C. People on a train

3. Please fasten your seatbelt. A. Students B. Airline passengers    C. People in a theatre

4. Please do not talk to the driver A. In your car B. In a shop C. On a bus

5. Tyres changed here A. At a garage B. At the cinema C. At a supermarket

IV. Use the correct form of the words in brackets to complete the sentences.

1. The plane’s (depart) …………………….was delayed because of (mechanic) ……………………. difficulties. The passengers (tell) …………………….that they would have to wait for three hours.

2. What a (love) …………………….painting. Your daughter must be very (art) ………………., Mrs. Green.

3. Harvest festival was the occasion for the (express) ……………….of the community’s beliefs and values.

4. The traffic in some cities now is so (chaos) …………….that it is difficult to see any (solve) …………….

5. Madonna’s (perform) …………………….in the film is praised by many (critic) …………………….

…………………………………………………………………………………………

1. We/ used/ school/ on/ foot.
……………………………………………………………………………………………………….

2. about / 30km/ my town/ Ha Long Bay/.
……………………………………………………………………………………………………….

3. My family/ used/ go / holiday / seaside / summer/.
……………………………………………………………………………………………………….

4. How/ long / it / take/ you/ Ha Noi / Sa Pa/?
……………………………………………………………………………………………………….

5. There / used / be / a factory / town centre / but/ it / move/ the/ suburbs/.
……………………………………………………………………………………………………….

6.  You/ must / learn / about / road safety/ before/ riding/ your/ bike/ road/.
…………………………………………………………………………………………

1. We must be quick. There’s …………time left.   A. little B. few C. much D. more

2. He made the soup by mixing ………… meat with some rice.  A. little B. few   C. a little D. a few

3. Luckily, I ………few mistakes in my last exam. A. make B. made  C. have made  D. am making

4. You look very …………. I’m sure you play sports regularly. A. thin B. fat   C. fit D. well

5. Hamlet is an example of a ……. It has an unhappy ending. A. tragedy B. character C. comedy  D. play

6. I …………such nice and enthusiastic volunteers before.

A. never meet B. have never met C. never met D. will never meet

7. I want to pass the test, …………I’m studying hard.  A. but B. because C. so D. although

8. Paul is similar to his brother in their interest ………horse riding. A. to B. with    C. for D. in

9. I am not ready yet and …………A. she is too B. she is not C. so is she D. she isn’t either

10. They play was very long, but there were two……… A. intervals  B. rests  C. interruptions D. gaps

……………………………………………………………………………………….

Sandwiches are common in many countries. But (1) ……                 ……did this strange name come from? The Earl of Sandwich (1718 – 1792) was an Englishman. He liked (2) …                        ………cards. One night he played for hours and got very hungry. (3) ……                    …… he didn’t want to stop his card games. He asked for some roasts meat (4) …                            ……… two pieces of bread. (People bake roast meat in the oven or a stove). He ate the food (5) ……                                       …… he played cards. People gave his name (6) ……                                           …… this new kind of food.

Pizza is (7) ……                                            ……international food. A baker probably (8) ………                            …the pizza in Naples, Italy. It was about the same time (9) ……                                                               …… the first sandwich. “Pizza” means “pie” in Italian. People (10) ……                                     …… the name “pizza pie” for a long time. Now it is just “pizza”.

1.                            A. what                                  B. when                              C. where                                     D. how

2. A. play                                                       B. played                                              C. plays                                D. playing

3. A. So                                                     B. Moreover                                                         C. But                              D. Because

4. A. for                               B. between                        C. on                         D. among

5. A. while                                           B. until                           C. after                                 D. before

6. A. to                                B. for                    C. from                                      D. with

7. A. other                       B. another                              C. others                               D. the other

8. A. did                                B. discovered                           C. invented                         D. found

9. A. than                            B. as                                                          C. like                                                D. from

10. A. was used                    B. have used                                               C. use                              D. used