Sodium sulphite is used in preserving squashes and other mildly acidic foods due to:

potassium salt has preservative action

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potassium metabisulphite prevents oxidation

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potassium metabisulphite is not influenced by acid

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sulphur dioxide and sulphurous acid formed kill bacteria and germs

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Solution

The correct option is D sulphur dioxide and sulphurous acid formed kill bacteria and germs
Sodium sulphite is used in preserving squashes and other mildly acidic foods. Sulphur dioxide and sulphurous acid formed kill bacteria and germs. Sodium sulphite is anti microbial agent and antioxidant.

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Similar questions

Which of the following cannot be used as a food preservative ?

(a) sodium metabisulphite (b) sodium hydroxide (c) sodium benzoate (d) citric acid

Rita wants to make mango jam, what should she use to preserve the jam?

I. Sugar

II. Sodium benzoate

III. Salt

IV. Sodium metabisulphite

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