44th B.P.S.C. (Pre) 2000
Which one of the following substances is used in the preservation of foodstuff?
aCitric acid
bPotassium chloride
cSodium benzoate✓ Correct
dSodium chloride
Explanation
Sodium benzoate is used for food preservation. Its chemical formula is C6H5COONa.
general-science