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Home > Science > Edexcel Science Topics > There’s one Earth > Useful products from air and seawater

Science

There’s one Earth

Useful substances from air and seawater - Test

1.

Air is mostly:

2.

Air liquefies at about:

3.

Which gas (nitrogen, oxygen or carbon dioxide) liquefies at the lowest temperature?

4.

Which gas (nitrogen, oxygen or carbon dioxide) is removed from the top of the fractionating column when liquefied air is distilled?

5.

What is the main salt in seawater?

6.

Which three products form when electricity is passed through concentrated salt solution?