Предмет: Химия, автор: artem2009paramonov

СРОЧНО какие соеденения называется амфотерными? Привелите примеры
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Ответы

Автор ответа: Artyomstern
1

Амфотерные соединения - это вещества, которые могут проявлять как кислотные, так и основные свойства.

Примеры : Al, Zn(OH)2, Fe2O3, Cr(OH)3, MnO2...

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I. READING
Read the text and complete the sentences after it.
Shall We Go to McDonalds?
McDonalds food has always been popular, especially with young people and children. They have always liked their Big Mac and drinks. You can find fast food restaurants in all countries of the world, almost in all big cities. People come in and quickly have their lunches and dinners. They say they like McDonalds restaurants because it doesn’t take them long to have a meal, the food is fairly tasty and you don’t pay much money for it. But is this food really healthy? Can we say that it does more good than harm to people who eat it?
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1) McDonalds food ... .
a) was popular in the past and is popular now
b) was popular in the past more than it is now
c) is popular only with young children

2) Eating junk food can be … as taking drugs
a) no less dangerous b) as dangerous c)not so dangerous

3) McDonalds food is ... .
a) quite healthy b) very dangerous c) rather unhealthy

4) Eating … food regularly is risky and can be really dangerous.
a) healthy b) junk c) genetically modified


5) Many people have become obese because…
a) of junk food b) they are fond of vitamins c) there is much sugar in pies and cakes

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