a)
There are a number of different types of intermolecular force possible between molecules.
Which types of forces can be classified as 'van der Waals' forces?
[2]
Assess your score
View Answer
b)
Methanol, CH3 OH, is a small alcohol molecule that forms hydrogen bonds with water.
Sketch 2 different hydrogen bonding interactions between methanol and water.
[2]
Assess your score
View Answer
c)
Methanol, CH3 OH can be oxidised to methanal, CH2 O and then to methanoic acid, HCOOH.
Identify the strongest type of intermolecular force between:
i)
Methanal molecules
ii)
Methanoic acid molecules
iii)
Water and methanal
iv)
Water and methanoic acid
[4]
Assess your score
View Answer
d)
Methanoic acid reacts with sodium hydroxide to form sodium methanoate:
HCOOH + NaOH HCOONa + H2 O
Explain why sodium methanoate is a solid at room temperature and methanoic acid is a liquid.
[3]
Assess your score
View Answer
Next Question
a)
Group 17 of the Periodic Table contain non-metals that are often referred to as the halogens.
Iodine, I2 , is one of these halogens. At room temperature and pressure it exists as a grey-black solid.
Describe the bonding and forces present in I2 in the solid state.
[2]
Assess your score
View Answer
b)
The state of the halogens changes down the group, with fluorine being a gas and astatine being a solid.
Explain why the melting point of the halogens increases down the group.
[2]
Assess your score
View Answer
c)
The halogens are all diatomic covalent molecules.
Predict the most probable physical properties shown by all of the elements in Group 17.
[3]
Assess your score
View Answer
d)
The halogens can also form interhalogen compounds, such as iodine monochloride, ICl.
Predict the state of iodine monochloride at room temperature and pressure, and explain your answer with reference to the intermolecular forces present.
[3]
Assess your score
View Answer
Previous Question Next Question
a)
Describe the bonding in solid sodium.
[2]
Assess your score
View Answer
b)
Potassium has a lower melting point than sodium does.
Explain why.
[2]
Assess your score
View Answer
c)
Magnesium is in the same period as sodium, but has a much higher melting point.
Explain why.
[2]
Assess your score
View Answer
d)
Predict whether magnesium is harder or softer than sodium and explain why.
[2]
Assess your score
View Answer
Previous Question Next Question
a)
Copper is a common metal used in wiring.
Explain the electrical conductivity of copper.
[2]
Assess your score
View Answer
b)
Explain why copper is also very malleable.
[2]
Assess your score
View Answer
c)
Copper is used in alloys such as brass and bronze.
Outline why copper alloys are usually less malleable than pure copper.
[1]
Assess your score
View Answer
d)
Copper is used for water pipes.
Suggest two properties of copper that make it suitable for this use, excluding malleability.
[2]
Assess your score
View Answer
Previous Question