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Write ‘Four’ Physical Methods of Preserving Food Materials - Chemistry

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Write ‘four’ physical methods of preserving food materials

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Solution

Food preservatives

  • Chemicals that prevent food from spoilage due to microbial growth

  • Example: Table salt, vegetable oil, sodium benzoate (C6H5COONa), salts of propanoic acid

  • Physical methods:
    a. By removal of heat 
    b. By addition of heat 
    c. By removal of water
    d. By irradiation
Concept: Chemicals in Food - Artificial Sweetening Agents and Food Preservatives
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