Sodium hydroxide is NOT used for  ________. 

This question was previously asked in
SSC GD Previous Paper 3 (Held On: 11 Feb 2019 Shift 3)
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  1. making soap 
  2. making newspapers
  3. degreasing metals
  4. preserving pickle

Answer (Detailed Solution Below)

Option 4 : preserving pickle
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Detailed Solution

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The correct answer is Preserving pickle.

Key Points

  • Sodium hydroxide (NaOH) is known as 'caustic soda' and it is a 'high-base' alkali.
  • It is used in the manufacture of pulp and paper cloth, drinking water, soap, and detergent.
  • In the field of medicine, sodium hydroxide is used for the treatment, control, prevention, and improvement of diseases.

Hint

  • Sodium benzoate is used as a preservative for carbonated drinks, jams and fruit juices, and pickles.
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