Paper 2 Questions

Question 1

Explain why nanoparticles may have properties that are different from the properties in bulk. [2]

Answer 1

• Nanoparticles have a high surface to volume ratio (1 mark).
• Smaller quantities are therefore are needed for them to more effective than materials with normal particles sizes (1 mark).

Question 2

What are the first four members of the alcohol homologous series? [4]

Answer 2

1. Methanol (1 mark)
2. Ethanol (1 mark)
3. Propanol (1 mark)
4. Butanol (1 mark)

Question 3

How are aqueous solutions of ethanol produced? [2]

Answer 3

sugar solutions are fermented (1 mark) using yeast (1 mark)

Question 4

When carboxylic acids react with alcohols, what do they produce? [2]

Answer 4

ester (1 mark) and water (1 mark)

Question 5

What are alkenes used for? [1]

Answer 5

they are used to produce polymers/ are the starting material for other chemicals . [1]

Question 6

Alkenes along with alkanes can be produced from cracking. How do we test for alkenes and what do we see? [2]

Answer 6

• tested with bromine water (1 mark)
• it will turn bromine water colourless (1 mark).

Question 7

Define condensation polymerisation [3]

Answer 7

• Condensation polymerisation involves monomers with two functional groups (1 mark)
• When these monomers react they join together (1 mark) usually losing small molecules,
• so are called condensation polymerisation reactions (1 mark).

Question 8

What must the two monomers have in common for the condensation polymerisation reaction to
occur? [1]

Answer 8

The same functional group [1]