Synthetic chemicals used as preservatives are:

Sodium benzoate

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Sodium hydroxide

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Potassium sulphate

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Ammonium chloride

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Solution

The correct options are
A Sodium benzoate
C Potassium sulphate
Preservatives are substances added to food items to preserve them for a long time so they can be stored and consumed safely later. Salt solution, sugar solution, oil, vinegar etc. are commonly used traditional preservatives. Apart from these, there are synthetic chemicals which are also used. Eg: sodium benzoate, potassium sulphate.

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Similar questions

Why do we use chemicals such as sodium benzoate and sodium meta-analysis bisulphate as chemical preservatives? Why don't other chemicals?

Name any two special chemicals which are used as food preservatives.

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