Air- revision

Air is a homogeneous mixture of gases.

• True

• False

78% of air is .......... .

• oxygen

• argon

• nitrogen

• water

Nitrogen dissolves in water very well.

• True

• False

Oxygen has no smell and colour.

• True

• False

In an analysis reaction we have a few substrates and one product.

• True

• False

Tlenek węgla + ............ --> węgiel + tlenek magnezu

What is missing?

• hydrogen

• carbon

• magnesium

• oxygen

Hydrogen is a chemical element that has the most density.

• True

• False

Hydrogen is combustible.

• True

• False

.......... + tlenek węgla (IV) --> tlenek miedzi (II) + węgiel

What is missing?

• hydrogen

• oxygen

• carbon

• copper

Mętnienie wody wapiennej to reakcja charakterystyczna dla ........... .

• oxygen

• carbon dioxide

• air

• hydrogen