What colour does the halogen bromine go when burnt?
Orange
Green
Blue
Complete the word equation. Bromine + sodium iodide ->
Bromine iodide + sodium
Iodine Bromide + sodium
Sodium bromide + iodine
Sodium reacts with chlorine. What is the name of the compound made?
Chlorine sodide
Sodium chloride
Sodium and chloride
The word equation for the action of heat on copper carbonate, CuCO3, is Copper carbonate -> copper oxide + carbon dioxide Write a balanced symbol equation for this reaction.
CuCO3 -> CuO + CO2
CuCO -> CO + CO2
CuCO3 -> 2CO + 2CO2
Copper is a transition element. Suggest the colour of copper carbonate when burnt.
Purple
Red
Car bodies can be made from steel or aluminium. What are two advantages of using aluminium instead of steel?
Aluminium is lighter than steel It has a natural layer that protects the surface from corrosion
It is a nicer colour There is more of it
There aren't any. Steel is better to make cars with than aluminium
Car seats can be made from leather. Leather is attractive to look at. Write down one other reason why leather is chosen to make car seats.
It is shiny.
There aren't any more reasons for why leather is chosen to make car seats.
They are easier to clean
The chemical name for rust is hydrated iron(III) oxide. Write down the word equation for the rusting of iron.
Hydrated Iron(III) oxide <- Iron + water + oxygen
Hydrated Iron(III) <- Iron + water
Hydrated Iron(III) oxide <- Iron + water + Salt
What state is fluorine at room temperture?
Solid
Liquid
Gas
