Air Flashcards
1
Q
Air is a mixture because
A
It’s composition varies from place to place
The different gases condense as liquids at different temps.
2
Q
Cobalt chloride paper
A
Is used to test for the presence of water. It is blue when dry, pink when wet
3
Q
Limewater
A
Is used to test for carbon dioxide
4
Q
Oxygen is prepared by he breakdown of
A
Hydrogen peroxide into oxygen and water in the presence of manganese dioxide
5
Q
Manganese dioxide
A
Is a catalyst-it speeds up the breakdown of the hydrogen peroxide
6
Q
A glowing splint is used to test
A
For oxygen. Oxygen relights a glowing splint
7
Q
Air consists of the elements
A
Nitrogen(78%) oxygen(21%) argon(1%)
