Out of following which compound is used for preservation of food?

N a C l

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H g C l_{2}

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Z n C l_{2}

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C a C l_{2}

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Solution

The correct option is A $N a C l$
NaCl has been used as a preservative for a long time. $N a C l$ helps to prevent spoilage and helps to keep food like ready to eat meats and cheeses to eat. So the correct option is A

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