Предмет: Химия, автор: Аноним

оксиды проявляющие амфотерные свойства это: 1)cao, na2o
2)K2O,MgO
3)BeO,Al2O3
4)Li2O,BaO

Ответы

Автор ответа: svetka1574
0

Оксиды с амфотерными свойствами: BeO, Al2O3

Ответ: 3

Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Математика, автор: iumniska
пожалуйста помогите мен​
6 лет назад
Предмет: Математика, автор: elizaduseeva5
Длина прямоугольника 4/5м ширина 1/5м найдите периметр
6 лет назад
Предмет: Английский язык, автор: saulezarylbekova
Test for the 6" form 3 четверть (1 вариант)

1. Find the adjective. The car is red. a) The b) car c) is d) red

2. Butter, cheese are ...

a) fruits b) milk products c) vegetables d) meat

3. Fill the sentence. My is on the 21 of October a) book b) friend c) birthday d) mother

4. Fill the article. Use your ... napkin.

a) b) a c) an d) the 5. I took ... job at ... garden centre.

a)-/the b) a/a c) an/the d) the/a 6. Spring is ... best season of. year.

a)-/the b) a/a c) an/the d) the/a

7. Choose the right pronoun. ... mother is a teacher.

a) he b) she c) mine d) their

8. We like ... republic.

a) our

b) she c) mine d) their

9. Choose the verb. Look at the little boys! They. . with shoes

a) play b) will play c) are playing d) is playing

10. Translate the sentence " Ularda mashina yo'q edi."

a) They don't have a car b) They had a car c) They didn't have a car

11. Choose the verb. I (go) to the park yesterday

a) went b) was c) want d) visited

12. Write the date " 1974"

a) nine eighty four b) ninety seventy four c) nineteen eighty two d) nineteen

seventy four

13. Choose the right answer. My mother's brother is my...

a) aunt b) niece

c) uncle d) grandfather

14. Choose the right answer. My sister's daughter is my...

a) aunt b) niece

c) uncle

d) grandfather

15. Find verbs ( irregular) go, swim, take, have.

a) go, swam, took, has

c) go, swim, took, had

16. Find verbs (regular)

a) talk, know, want, put

c) swim, talk, help, put

b) went, swim, took, has d) went, swam, took, had

b) talk, want, watch, help

d) have, go, help, watch

17. Choose the right answer " to be" There. a lot of pupils at school. The

school ... far from my house.

a) are/is b) is/are c) -/are d) are/- 18. When and where were you born?

19. Translate the sentence: " Last month we visited my grandparents." 20. Cheeseburgers came to Uzbekistan from .

21. Fill the sentence. In summer it is ... in Uzbekistan. "

22. Write the antonym to " new

23. Write the antonym to "expensive " 24. How many regions are there in Uzbekistan?

25. How many parts are there in the UK?
6 лет назад
Предмет: Алгебра, автор: LizaZai
Найдите sin t, если cos t=√91/10 и t принадлежит (0;п/2).Знаю как решать.
sin^2 a + cos^2 a = 1; ⇒ sin^2 a = 1 - cos^2 a
Расскажите пожалуйста, как мне из 1 вычесть √91/10.
9 лет назад
Предмет: Физика, автор: fatimkama
Скоростью равномерного прямолинейного движения называется_________________величина, равная _______________ __________________________ к промежутку времени
9 лет назад