When substances react with oxygen they form
- oxides
- chlorides
- hydroxides
- sulphides
When substances react with chlorine they form
- chlorides
- oxides
- chlorates
- nitrates
When substances react with carbon and oxygen they form
- carbonates
- carbonides
- oxides
- sulphates
When substances react with sulphur and oxygen they form
- sulphates
- carbonates
- nitrates
- sulphides
When substances react with nitrogen and oxygen they form
- nitrates
- carbonates
- chlorates
- sulphates
When substances react with iodine they form
- iodides
- bromides
- oxides
- chlorides
When substances react with sulphur they form
- sulphides
- carbonides
- oxides
- sulphates
Which of these is not present in Zinc Sulphate
- carbon
- zinc
- sulphur
- oxygen
Which of these is not present in Copper Sulphate
- hydrogen
- copper
- oxygen
- sulphur
Not a property of mixtures
- fixed composition
- easy to separate into elements
- composition can vary
- made of two or more substances
Not a property of compounds
- easy to separate into elements
- fixed composition
- one substance only
- difficult to separate into elements; a reaction is needed
Fractional distillation separates mixtures uses the fact that different substances have different
- boiling points
- melting points
- densities
- smells
Which of these would not be used to get pure water from salty water
- chromatography
- evaporation
- condensation
- distillation
Which of these modifications will help magnesium burn quickly as seen in fireworks?
- make it into a fine powder
- clump it together in one big lump
- mix it with another metal
- heat it up more
When we mix two or more metals together we make
- an alloy
- an element
- a mixture
- it weaker
The boiling point of a substance is
- always higher than the melting point
- always lower than the melting point
- usually but not always higher than the melting point
- lower than the freezing point
The boiling point of a substance is
- the point at which the substance turns from a liquid to a gas
- the point at which the substance turns from a gas to a solid
- the point at which the substance turns from a liquid to a solid
- the point at which the substance turns from a solid to a gas
If a substance sublimes then it doesn't have a
- liquid form
- solid form
- gas form
- backbone
Aristotle came up with a theory that substances were made up from various parts. One of these was not part of his theory
- ash
- water
- earth
- fire
For a pure substance the melting and boiling point are always
- constant
- equal
- different
- within 5 degrees C of each other
Alchemists were obsessed with turning metals such as lead into
- gold
- water
- silver
- tin
What percentage of the air is oxygen
- 21%
- 78%
- 18%
- 1%
A centrifuge can be used to separate
- the blood cells from the plasma
- different coloured inks
- the sulphur from sulphuric acid
- salt from salty water
Which of these can be used to separate out different coloured inks
- chromatography
- colourimetry
- filtration
- condensation
Solids can be separated out from liquids by
- filtering
- dissolving
- chromatography
- fractional distillation
When scuba divers rise to the surface to quickly dissolved nitrogen can come out as bubbles in the blood. This is called
- the bends
- bubbling
- corners
- fizzing
Which of the following is not made from crude oil
- metals
- plastics
- petrol
- lubricating oil