WorksheetsThe wonders of chemistry at KS4
Total questions: 26
Worksheet time: 13mins
How many electrons has one fluorine atom?
9
19
10
Loads - you can't tell from this image
Which element is the FIRST element in group 1 in the periodic table?
hydrogen
helium
lithium
unobtanium
Which non-metallic element is the most reactive non-metal?
chlorine
bromine
windowlene
fluorine
What is the definition of isotopes?
Different elements with a similar appearance
Atoms with the same numbers of protons but different numbers of neutrons
Atoms with radioactive tendencies
The same elements but with different physical appearances
Beryllium is in group 2 and fluorine is in group 7. How many atoms of fluorine are needed to react with one atom of aluminium?
1
2
3
7
What type of bonding is present in graphite?
Ionic
Covalent
Metallic
Adhesive
Why is graphite a good conductor of electricity?
It has big spaces between atoms to allow the current to flow
It has a low electrical resistance due to the gaps between the atoms
It has delocalised electrons which are free to move through the structure
It has lots of ions which are able to move easily
The structure of gold can be described as...
Giant metallic lattice
Simple molecule
Complicated
Giant ionic lattice
Ethanol has a low melting and boiling point because...
It has weak covalent bonds
It has weak ionic bonds
It has weak bonds between layers
It has weak intermolecular forces of attraction
What is the name of this piece of equipment?
A burette
A volumetric pipette
A Pasteur pipette
A syringe
How many atoms in of oxygen are in aluminium hydroxide?
3
5
7
6 X 1023
Which gases do scientists think had the highest percentages when the earth first formed?
Ammonia, methane and water
Ammonia, methane and carbon dioxide
Carbon dioxide, nitrogen and oxygen
Carbon dioxide, water and oxygen
Why did levels of carbon dioxide decrease in the atmosphere? Choose TWO options.
People stopped breathing
People respired
Plants photosynthesised
Some was absorbed into the oceans
Plants respired
Which chemicals can be added to water in order to make it safe to drink?
Chlorine and covid-19
Chlorine and UV light
Chlorine and ozone
Chlorine and bromine
Potable water is...
Pure water
Water containing low levels of dissolved minerals
Water from a pot containing typhoid bacteria
Salt solution
What is the MAIN reason that carbon dioxide levels are rising?
The population is increasing
The rain forests are being removed
We are burning fossil fuels
We are burning more fossil fuels
Nitrogen dioxide is produced when...
Nitrogen reacts with oxygen inside a hot car engine
Nitrogen monoxide reacts with oxygen in the air
Nitrogen reacts with carbon dioxide
Nitrogen reacts with oxygen inside a catalytic converter
A correct way to remove sulfur dioxide from the acidic gases released by power stations is...
To spray the gases with calcium oxide or calcium carbonate to neutralise them.
To spray the gases with sodium hydroxide or potassium hydroxide to neutralise them.
To remove the sulfur from the fuels before burning.
To dissolve the gases in plenty of water.
The products from the reaction between copper carbonate and sulfuric acid are...
Copper oxide and water
Copper sulfide and water
Copper sulfate and water
Copper sulfate, water and carbon dioxide
How would we describe a substance with a pH of 7.3?
Weak acid
Neutral
Weak alkali
Water
Which of the following are both amphoteric oxides?
Sodium oxide and copper oxide
Zinc oxide and aluminium oxide
Sulfur dioxide and nitrogen dioxide
Nitrogen monoxide and carbon monoxide
What can we use to detect the presence of water?
Anhydrous copper II sulfate and dry cobalt chloride paper
Lime water and hydrated copper II sulfate crystals
Lit spill
Damp litmus paper
Oxides which show no acidic or basic properties are known as...
Salts
Amphoteric
Acebase oxides
Neutral oxides
Which of the following could be used as a catalyst in chemistry?
Sodium
Hydrogen bomb
Argon
Platinum
Which of the following happens when a catalyst is used in a reaction? Choose TWO options.
Particles gain more kinetic energy.
Particles gain more activation energy.
More particles reach activation energy.
The catalyst lowers the activation energy.
The pupils are galvanised into action.
Which of the following is an example of a reversible reaction?
Sulfur + oxygen
Sulfur dioxide + oxygen
Sulfur trioxide + water
Sulfuric acid + oleum
