Câu 16: Có 5 lọ không nhãn, mỗi lọ đựng một dung dịch các chất sau: NaCl, K2SO4, H2SO4, HNO3, Ba(OH)2. Chỉ được dùng thêm 1 hóa chất để phân biệt 3 lọ trên, hóa chất cần dùng là: A. dd phenolphtalein B. dd NaOH C. Quỳ tím D. dd BaCl2 Câu 17: Cho 20 gam CaCO3 vào 500 ml dung dịch HCl 1M (d = 1,2 g/ml), khuấy đều cho phản ứng xảy ra hoàn toàn. Tính thể tích khí CO2 sinh ra: A. 4,48 lít B. 5,6 lít C. 2,24 lít D. 8,96 lít Câu 18: Cho 200ml dung dịch BaCl2 0,5M vào 300ml dung dịch H2SO4 0,3M đến khi phản ứng xảy ra hoàn toàn. Khối lượng kết tủa thu được là: A. 23,3 g B. 20,97 g C. 20 g D. 22,5 g Câu 19: Chỉ được dùng duy nhất 1 hóa chất để phân biệt 3 lọ mất nhãn chứa các dung dịch sau: HCl, H2SO4, Ba(OH)2. Hãy chỉ ra hóa chất cần dùng: A. Quì tím B. dd NaOH C. dd phenolphtalein D. A & C Câu 20: Hòa tan 2,7 gam kim loại A bằng dung dịch H2SO4 loãng dư. Sau phản ứng thu được 3,36 lít khí H2 (đktc). Kim loại A là: A. Fe B. Zn C. Al D. Mg

I.  MULTIPLE CHOICE (8.0 points)

Mark the letter A, B, C, or D to indicate the word whose underlined part is pronounced differently front that of the rest in each of the following questions.

1. A. oceanic    B. remote    C. occasion    D. metro

2. A. festival    B. cultural    C. sculpture    D. virtual

Mark the letter A, B, C, or D to indicate the word that differs from the other three in the position of primary stress in each of the following questions.

3. A. external    B. determine    C. mysterious    D. customer

4. A. miraculous    B. individual    C. certificate    D. astronomy

Mark the letter A, B, C, or D to indicate the underlined part that needs correction in each of the following questions.

5. Now that the stress of examinations are over, we can go somewhere for our holiday.

                     A                     B                     C                     D

6. The English summer course will start in May 29th and finish in August.

                     A                     B                     C                     D

7. There were so a lot of people trying to leave the burning building that the police

             A                B             C

had a great deal of trouble controlling them.

                   D

Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.

8. The earthworm is a worm _______in moist, warm soil in many geographical areas.

    A. where is it found       B. is found

    C. and found it               D. which is found

9. Our flight from Amsterdam to London was delayed    the heavy fog.

    A. as a result     B. on account     C. instead of     D. due to

10. It is_______ to translate each lesson into your language. This is not a good way to study English.

    A. productive     B. unproductive     C. producing     D. unproducing

11. A good clock always keeps_______ time.

    A. certain    B. accurate    C. true    D. serious

12. It seems that the world record for this event is almost impossible to_______.

    A. meet    B. compare    C. beat    D. balance

13. The soldier was punished for_______ to obey his commanding officer's order.

    A. refusing    B. regretting    C. objecting    D. resisting

14. It is believed that she'll be a billionaire by the time she_______ forty.

    A. is    B. was    C. will be    D. would be

15. Some of the passengers spoke to reporters about their_______ in the burning bus.

    A. occasion    B. happening    C. event    D. experience

16. _______the rise in unemployment, people still seem to be spending more.

    A. Nevertheless    B. Meanwhile    C. Despite    D. Although

Choose the best answer.

I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

Choose the best answer.

We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

Choose the best answer.

I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.