@Diamond is one of the hardest substances known. This is because:
the atoms are tightly packed in a giant structure
the atoms are arranged in layers
diamond contains both ionic and covalent bonds
@Which one of the following is a liquid at room temperature?
Bromine
Iodine
Fluorine
@The diagram shows an experiment set up to test the diffusion of hydrogen. If the apparatus is left for some time:
#diff
The level in tube x goes down and the level in tube y up
The two levels in x and y stay the same
The level in tube y goes down and the level in x goes up
@A piece of moist universal indicator paper is put into ammonia gas. The paper will:
Turn blue
Turn red
Turn green
@Roughly how much of the Earth's crust is made by oxygen (in various compounds)?
47%
5%
21%
@Sulphur is obtained from the ground by the:
Frasch process
Contact process
Lacq process
@The name of this substance is:
#propene
Propene
Propanol
Propane
@Which of the following atoms is the largest?
Rb
K
Li
@Two test tubes contain sulphuric acid. In tube X is magnesium powder and in tube Y are small pieces of magnesium. Both contain the same amount. Which statement is correct?
#ttube
Tube X will react more quickly than Y
Tubes X and Y will react at exactly the same rate
Tube Y will react quicker than X
@Copper II oxide reacts with hydrogen to form copper and water. The copper II oxide is:
Reduced
Oxidised
Neutralised
@What liquid is used to 'top up' car batteries?
Distilled water
Nitric acid
Hydrochloric acid
@What are fossil fuels?
Fuels that are formed from things that were once alive
Fuels that are formed only from the bones of land animals
Fuels formed from plant material only
@If this measuring cylinder was full to the top of the scale it would contain:
#cylin1
75.0 cmÏ
70.0 cmÏ
45.0 cmÏ
@To separate the dyes ink is made from, it is easiest to use:
Chromotography
Filtration
Evaporation
@What is the relative molecular mass of chlorine gas?
71.0
35.5
72.0
@Which of the following statements MUST be true for an acid salt?
It contains hydrogen that can be replaced by a metal
It can only be formed from a weak acid
It is formed when an acidic oxide reacts
@The liquid in the container is copper II sulphate (CuSOÝ). When carbon rods X and Y are connected to a battery, gas bubbles can be seen around one of them. This gas is:
#electro1
Oxygen
Hydrogen
Sulphur dioxide
@Heat is one form of:
Energy
Joules
Light
@In a crystal atoms are arranged:
In a regular pattern
According to the shape of the container they were made in
In single long chains
@Iron and sulphur are:
Both elements
Both compounds
Both mixtures
@Which one of the following contains 10 electrons, 11 protons and 12 neutrons?
Naä
MgÎ
F×
The reaction below is for the extraction of aluminium. Which one is correct?
2AlÛOÜ(l) ï 4Al(l) + 3OÛ(g)
2AlÛOÜ(s) ï 2Al(s) + 3OÛ(g)
AlÛOÜ(s) ï 2Al(l) + 3O(g)
@Out of the hundred or so known elements, how many are metals roughly?
80
20
50
@A metal nitrate was heated, producing oxygen gas,and left behind a pale yellow residue. The nitrate was:
Sodium nitrate
Lead nitrate
Calcium nitrate
@In carbon dioxide, then main types of bond are:
Covalent
Ionic
Van der Waals
@Which one of the following is a solid at room temperature (20ÌC)?
Iodine
Bromine
Chlorine
@If a lighted splint is put into a test tube containing hydrogen then it will:
Make a popping sound
Burn more brightly
Make the splint go out
@When hydrogen chloride gas mixes with ammonia gas:
