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GATE 2025 AG – Question 24

Dairy and Food Engineering · Preservation of Food · 1 mark · Multiple select

Which generally result from blanching fresh fruits and vegetables? Select all that apply.

  1. Complete elimination of microorganisms
  2. Removal of entrapped air between plant tissues
  3. Leaching of nutrients
  4. Inactivation of enzymes

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Correct answer: (B) Removal of entrapped air between plant tissues; (C) Leaching of nutrients; (D) Inactivation of enzymes

Explanation

Blanching is a brief heat treatment that inactivates enzymes and expels entrapped air. Water-soluble nutrients may leach into the blanching medium. It reduces microbial load but does not sterilize the product or guarantee complete elimination. Thus the applicable effects are **B, C, D**.

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