Which of the following chemicals is used as a preservative to slow browning and discolouration in foods and beverages during preparation, storage and distribution?

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SSC CGL 2023 Tier-I Official Paper (Held On: 17 Jul 2023 Shift 2)
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  1. Nitrous oxide
  2. Phosgene
  3. Sulphites
  4. Chlorine

Answer (Detailed Solution Below)

Option 3 : Sulphites
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Detailed Solution

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The correct answer is Sulphites.Key PointsSulphites:

  • Sulphites are natural compounds found in foods like dried fruits, wine, and beer.
  • They're also added as additives to prevent browning, discoloration, and spoilage in foods and drinks.
  • Sulphites release sulphur dioxide (SO2), an irritant gas, which can cause allergy-like symptoms in individuals with conditions like asthma.
  • Around 13% of people with asthma also suffer from sulphite sensitivity.
  • People with urticaria may also experience worsened symptoms after consuming sulphites.
  • Due to health concerns, products containing sulphites are labeled, helping individuals make informed choices.

Additional Information

Chemical Formula Uses and Characteristics Notes
Nitrous Oxide N2O - Anesthetic and analgesic in medical procedures - Used in dentistry for pain relief
    - Induces euphoria when inhaled - Proper administration by professionals required
    - Propellant in whipped cream dispensers  
Phosgene COCl2 - Historically used as a chemical weapon in warfare - Lethal gas used in World War I
    - Used in chemical manufacturing for plastics and pesticides - Causes severe respiratory and lung damage
    - Highly toxic  
Chlorine Cl2 - Water treatment for disinfection of drinking water and swimming pools - Vital for public health maintenance
    - Ingredient in bleach and cleaning products - Can cause respiratory issues in high concentrations
    - Used in PVC plastics production
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