Bulk and Surface Properties Of Matter (1)

Question 1

What would you see when sodium hydroxide solution is added drop by drop to tap water containing aluminium ions?

Answer 1

Sodium hydroxide produces a white precipitate which then dissolves in excess sodium hydroxide

Question 2

Tick the best description of nanosize layer

Answer 2

A layer a few hundred atoms thick

Question 3

Suggest two ways in which using ‘nanocoated’ tennis balls would be good for the environment

Answer 3

Less pollution and less waste

Question 4

How can you tell from the diagram that polymer B is not thermosoftening?

Answer 4

There are covalent bonds between polymers

Question 5

Give the formula of the compound

Answer 5

NO

Question 6

Suggest why a manufacturer of catalytic converters would want to use less catalyst

Answer 6

Reduce cost

Question 7

The silver nanoparticles should be trapped in the sock fibres.
Explain why

Answer 7

So they do not get released during washing so the socks keep their odour preventing properties