Which of these are used as food preservatives?

sodium chloride

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sodium metabisulphite

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both of these

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none of these

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Solution

The correct options are
A
sodium chloride

B
sodium metabisulphite

C
both of these

Preservatives are chemical agents that prevent the growth of microbes. Sodium chloride (common salt), potassium metabisulphite, citric acid, oil, sugar, etc are commonly used food preservatives.

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

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In 2Na_(S) + Cl₂ → 2 NaCl_(S) ; The oxidising agent is

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