a)
C2H6, C4H10 and C3H8 are alkanes.
i)
Put them in order of increasing boiling point and explain your answer.
[3]
ii)
Put them in order of increasing volatility and explain your answer.
[3]
b)
Predict, with a reason, whether the alkanes are soluble in water and propanone.
[5]
c)
Pentane can exist as isomers, including pentane, CH3CH2CH2CH2CH3 and 2,2-dimethylpropane, CH3C(CH3)2CH3.
i)
Draw skeletal formula for each isomer shown above.
[2]
ii)
Predict and explain which isomer of pentane would have the greater volatility.
[3]
d)
There are two isomers possible with the molecular formula C2H6O.
i)
Draw the skeletal formulae of both isomers
[2]
ii)
Identify the strongest type of intermolecular force present in each isomer
[2]
iii)
Predict which isomer would have the higher melting point
[1]
a)
Explain why transition metals, such as iron, alloy best with other transition metals, such as nickel.
[2]
b)
State the name of the most common type of iron alloy and the element it is alloyed with.
[2]
c)
Describe and explain the trend in the melting points of all the Group 1 metals as you descend the group.
Use page 7 of the Data book.
[3]
d)
Describe and explain the trend in melting points across the Period 3 metals of sodium, magnesium and aluminium.
Use page 7 of the Data book.
[3]
