Đốt cháy hoàn toàn 14g etylen

a) Viết phương trình phản ứng và tính thể tích không khí cần dùng ở đktc? Biết thể tích oxi bằng 1/5 thể tích không khí

b) Tìm khối lượng khí cacbonic tạo thành, biết hiệu suất phản ứng là 80%

Cho 50ml dung dịch HCl nồng độ 2M tác dụng vừa đủ với dung dịch NaHCO3 1M

a) Tính thể tích dung dịch NaHCO3 đã dùng

b) Khí thoát ra dẫn qau nước vôi trong. Tính khối lượng kết tủa tạo thành

Dẫn 11,2 lít khí etilen qua bình đựng dd brom thu được sản phẩm đibrom etan

a) Viết phương trình phản ứng xảy ra

b) Tính m (khối lượng) sản phẩm thu được ( biết H=90%)

Complete the second sentence in each pair so that it has the similar meaning to the first sentence:

Go to bed early and you will be healthier.

=> If ______________________________________________________________.

2. Vegetarians don’t eat meat.

=> If you’re a vegetarian, ______________________________________________

Do as directed in brackets

He turned on the air conditioner because it was hot.

_________________________________________________________________

(Rewrite the sentence, using ‘so’ )

We/used/have/good time/grandparents/when/we/children.

(Complete the sentence using the words given)

__________________________________________________________________

I. Choose the best answer to complete each sentence or do as directed

Choose the word whose main stress is placed differently from the others:

a. adulthood b. confidence c. influence d. empathy

Choose the word whose underlined part is pronounced differently from the others:

a. variety b. generation c. facility d. familiar

2.The dragon pattern was sometimes _______________ on the cloth.

a. moulded b. carved c. cast d. embroidered

What time will you set up _______________ Da Lat?.

a. with b. for c. at d. in

We can _________________the information of the journey on leaflets.

a. look up b. look through c. set up d. find out

He asked me where ________________ the next day.

a. to go b. go c. went d. would go

When I turned up , the town hall was _____________ of teenagers .

a. packed b. full c. crowded d. jammed

She turned _______________ the new job in New York because she didn’t want to move to a strange place.

a. on b. off c. up d. down

Japan is the _______________ developed country in the world .

a. most second b. second in most c. second most d. two most

Men used __________________ the bread winner of the family a. to be b. being c. be d. to being

They wish they _______________ a new house now.

a. have b. had c. will have d. would have

Giving lucky money to the young and the old at Tet is a common ________ in many Asian countries.

a. behavior b. tradition c. practice d. occasion

I love going to this park ______________ it is the quietest place in the city.

a. so b. though c. so that d. as

Do you know who is _________________ his pottery workshop? .

a. taking over b.bringing out c. passing down d. turning down

She said to me that she _________________ to me the Sunday before.

a. wrote b. has written c. had written d. was writing

Fill in the space with a suitable word based on the one provided in brackets.

1. It isn't __________ to stay that your trip cost only fifty US dollars. (reason)

2. Due to its extremely dangerous areas, the forest is __________ . (accessible)

3. The Egyptian pyramids attract approximately 14 million__________ every year. (tourism)

4. Hawaiian native raspberry is a type of __________ fruits. (tropic)

5. Tammy was very __________ with the trip's schedule offered by this travel agency. (pleasure)

6. All of our 300 guests were __________ by this luxury hotel. (accommodation)

7. It is believed that open- ___________ people usually like travelling to new places. (mind)

8. The __________ of Bali has persuaded her to choose it for her honeymoon. (magnificent)

Choose the underlined word or phrase (marked A, B ,C or D) in each sentence that needs correcting.

1. The bad weather didn't make my flight be delayed, but the

A B C

terrorism does

D

2. Kevin had took home lots of nice souvenirs last time, so he didn't buy

A B C D

anymore

3. A tour guide was showing the tourist around when a something fell

A B C

down from the sky.

D

4. If you decide to start the trip, you must reserve a seat in

A B

advancece on planes or trains.

C D

5. I bet you will never have the nerve to start an expedition

A B C

to an Amazon rainforest.

D

Write the sentences, using the correct form and tense of the verbs in brackets:

1. I decide __________ (book) my holiday with Vietravel, a reputable travel agency.

2. I __________ (just/narrow) my trip down to three Asian countries due to the high cost.

3. Although it is nearly the end of his journey, John prefers __________ (explore) the Thames river.

4. Since an event happened, Sofia __________ (make) up her mind when to end the trip.

5. Sue __________ (tease) David about wearing an ugly T-shirt at the moment.

Choose the underlined word or phrases that are not correct in standard written English then correct them

1. He is used to drink coffee for breakfast but now he drinks milk

2. We were very poor when we were first in America, we can't buy everything

3. We have lived in Viet Nam for a long time , so we used to the hot

4. My uncle wishes he didn't waste time when he was young

5. We had to use the stairs because te lift was out order

6. He has worked for the same company since he leaves school

7. This is the first time I tried to play badminton

8. We wish we can consult an expert on how to solve this problem

9. I used to listen to music during i was riding my bike to school

10. He said that they will have to set off soon after midnight

11. when he lived in Japan, he didn't used to eat food with forks, but with chopsticks.

12. She wishes she is not getting stuck in another traffic jam

13. He works much more hard for his exams than he does for his normal shool work

14. Thank you for inviting me to the party, i wish i can but I can't

15. When I was on holiday last summer, i was going to the beach everyday