A Levels Chemistry

Sulfur dioxide is used to bleach wood pulp in the production of paper. It is also used as an
additive in the production of jam and marmalade, often in the form of sulfite compounds. When it
is present in quantities greater than 10 mg / kg it is required to be listed as an ingredient of the
jam.
Why is sulfur dioxide added to jam?
A It is a bleaching agent and removes the undesirable colours from the fruit used in the jam.
B It is a preservative that destroys unwanted bacteria and enzymes.
C I tis a reducing agent and removes the acids that give the jam a sharp taste.
D It is an acidic gas and maintains the pH of the jam at a suitable value to give it a sharp taste.


Nitrogen and Sulfur | 2010 - O/N - 9701/11 | Q18