Which of these is a food preservative?

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 option is D
none of these

Sodium chloride (common salt), acids like sodium benzoate and sodium metabisulphite are commonly used food preservatives. Sodium lauryl sulphate (SLS) is a detergent usually present in shampoo.

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

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

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

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