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Which one of the following is used as a food preservative ?
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- Sodium benzoate
- Sodium thiosulphate
- Sodium hydroxide
- Sodium bicarbonate
Correct Option: A
Sodium benzoate has the chemical formula NaC6H5CO2; it is a widely used food preservative, with E number E211. It is the sodium salt of benzoic acid and exists in this form when dissolved in water. It can be produced by reacting sodium hydroxide with benzoic acid.
