DP Chemistry (last assessment 2024)

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Question 18N.3.sl.TZ0.11c.ii

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.3.sl.TZ0.11c.ii
Level sl Paper 3 Time zone TZ0
Command term Describe Question number c.ii Adapted from N/A
c.ii.
[Maximum mark: 1]
18N.3.sl.TZ0.11c.ii

Solar energy, which is freely available, is indispensable to life on earth.

(c.ii)

Describe how vegetable oils can be converted to a more suitable fuel.

[1]

Markscheme

convert to esters of monoatomic alcohols

OR

react with short-chain alcohols «in the presence of acid or base» ✔

 

Accept “convert to shorter «carbon chain» esters” OR “transesterification”.

Accept specific alcohols, such as methanol or ethanol.

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