(1.2
xidise
for a long time?
ining food materials left
When fats and oils are oxidised, they become rancid and their smell
and taste change. Usually substances which prevent oxidation
educo (antioxidants) are added to foods containing fats and oil. Keeping food
gena in air tight containers helps to slow down oxidation. Do you know that
xidise chips manufacturers usually flush bags of chips with gas such as
eduo, nitrogen to prevent the chips from getting oxidised ?
eaction
QUESTIONS
1.
(1.30
2.
Why does the colour of copper sulphate solution change when
an iron nail is dipped in it?
Give an example of a double displacement reaction other than
the one given in Activity 1.10.
Identify the substances that are oxidised and the substances
that are reduced in the following reactions.
(i) 4Na(s) + 0,(g) → 2NaO(s)
(ii) CuO(s) + H,(g) Cu(s) + H,O(1)
3.
1.31)
1.32)
13
ence Chemical Reactions and Equations
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BALESE
H.
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